BizhubPRESSC1070 Troubleshooting Guidev1.9E

TROUBLESHOOTING GUIDEC1070/C1070P/C1060/C71hc C1060L 2015.4 Ver.1.9 PP support div. Table of contents To correct trouble 1. Image quality 1.1 Spot 1.1.1 Cyclic white spot/black spot ----------------------------------------------------------------------------------- 4 1.1.2 Color Spots due to soilage inside machine ---------------------------------------------------------------- 5 1.1.3 Color Spots (black spots) -------------------------------------------------------------------------------------- 9 1.1.4 White Spot due to the developing leakage (foreign material) ---------------------------------------- 11 1.1.5 White dots from 2nd transfer unit --------------------------------------------------------------------------- 12 1.1.6 First thing in the morning, Attachment of white dusts like a eraser shaving on the paper ttachment of white dusts ---------------------------------------------------------------------------------------------- 13 1.2 Line/Band 1.2.1 Line and uneven density countermeasure flow ---------------------------------------------------------- 15 1.2.2 White lines (to sub-scan direction) ------------------------------------------------------------------------- 18 1.2.3 Gloss line caused by fusing paper exit roller ------------------------------------------------------------- 20 1.2.4 Banding in the main scan direction on halftone image printed on thick paper (Jitter problem) --------------------------------------------------------------------------------------------------------- 21 1.2.5 Line like ripple on image -------------------------------------------------------------------------------------- 24 1.2.6 Waste toner packin ------------------------------------------------------------------------------------------- 25 1.2.7 Darker image up to 44mm from leading edge or after 53mm from white area (Developing memory) ------------------------------------------------------------------------------------------------ 26 1.2.8 Lines or banding to the main scan direction (CD) due to speed difference between 2nd transfer and fusing -------------------------------------------------------------------------------- 27 1.2.9 Image got blurred affected by ozone (cyclic white band) -------------------------------------------- 29 1.2.10 Photoconductor (Drum) memory ------------------------------------------------------------------------- 30 1.2.11 Developing screw mark (at low speed) --------------------------------------------------------------- 32 1.2.12 Lines or banding on image due to speed change (shock noise) --------------------------------- 34 1.2.13 Developing roller (44mm) cycle banding (different density) --------------------------------------- 43 1.2.14 Irregular darker or lighter density band appears after leaving machine under high humidity environment ------------------------------------------------------------------------------------------------------------- 44 1.2.15 Jittering lines at trailing edge ----------------------------------------------------------------------------- 45 1.2.16 8mm interval FD lines -------------------------------------------------------------------------------------- 46 1.2.17 Density change by static electricity ---------------------------------------------------------------------- 47 1.2.18 FD Lines and Banding -------------------------------------------------------------------------------------- 49 1.2.19 5mm cycle density difference caused by the fusing unit ------------------------------------------- 52 1.2.20 Color lines in CD at 13mm from the leading edge --------------------------------------------------- 53 1.2.21 White line due to separation claw mark ---------------------------------------------------------------- 55 1.2.22 Gloss band in CD with margin width -------------------------------------------------------------------- 56 1.2.23 Image lacks at the corner of the trailing edge (Soilage in main scan direction (CD) -------- 58 1.3 Others 1.3.1 Image after white part becomes darker (Developing ghost) ---------------------------------------- 60 1.3.2 Darker at the trailing edge of image ------------------------------------------------------------------------ 62 1.3.3 Background or toner scattering after continuous low coverage ------------------------------------- 63 1.3.4 How to maintain consistent color during continuous printing ----------------------------------------- 64 1.3.5 Small blank area or color registration error ------------------------------------------------------------- 66 1.3.6 Too high gloss -------------------------------------------------------------------------------------------------- 68 1.3.7 Rough image on the 1st side of duplex ------------------------------------------------------------------ 69 1.3.8 White or color banding at thick paper leading and trailing edges ---------------------------------- 70 1.3.9 C-2451, C-2452, C-2453 or C-2454, Low toner density --------------------------------------------- 72 1.3.10 Poor transfer at image front ------------------------------------------------------------------------------- 73 1.3.11 Prevention of the backside soilage ---------------------------------------------------------------------- 75 1.3.12 Fainted outline, darker at edge --------------------------------------------------------------------------- 76 1.3.13 Image bacground under high temperature ------------------------------------------------------------ 77 1.3.14 Backside image soilage ------------------------------------------------------------------------------------ 78 - 1 - KONICA MINOLTA Confidential 1.3.15 Toner is not cleaned at the edge of the transfer belt ------------------------------------------------ 80 1.3.16 TransferabilityatFeedingEmbossPaper ----------------------------------------------------------------- 82 1.3.17 Image density is lighter on uncoated paper(rough paper) ----------------------------------------- 85 1.3.18 Gloss memory ------------------------------------------------------------------------------------------------ 87 1.3.19 Center of line gets broken --------------------------------------------------------------------------------- 88 1.3.20 Secondary color text scatters ----------------------------------------------------------------------------- 89 1.3.21 Image offset caused by fusing unit ---------------------------------------------------------------------- 91 1.3.22 Coverage setting for the exit toner band --------------------------------------------------------------- 97 2 Paper conveyance failure 2.1 Others 2.1.1 Paper waving -------------------------------------------------------------------------------------------------- 100 2.1.2 Setting for OHP sheet printing ----------------------------------------------------------------------------- 101 2.1.3 Trailing edge skews ------------------------------------------------------------------------------------------ 102 2.1.4 Printed paper curls (without RU connection) ----------------------------------------------------------- 103 2.1.5 Fusing wrapping jam ----------------------------------------------------------------------------------------- 105 2.1.6 No feed jam (J-1101/J-1201) ------------------------------------------------------------------------------- 108 2.1.7 Dents on paper at 48mm cycle in FD --------------------------------------------------------------------- 111 2.1.8 Centering error (±5 mm or more) ------------------------------------------------------------------------- 113 2.1.9 Paper stick with each other due to static electricity -------------------------------------------------- 116 2.1.10 Paper removing procedure on fusing wrap up JAM ------------------------------------------------ 122 2.1.11 J-3102 Thin paper feed failure at the 2nd transfer unit --------------------------------------------- 126 2.1.12 Paper wrinkle at duplex printing ------------------------------------------------------------------------- 129 2.1.13 J-3201 paper is caught by the fusing separation claw --------------------------------------------- 130 2.1.14 Corner folding at the paper leading edge, machine front side ----------------------------------- 131 3 Machine Troubles 3.1 Control 3.1.1 Printer gamma offset automatic adjustment does not complete normally after trying several times ---------------------------------------------------------------------------------------------------------- 133 3.1.2 Print job is not accepted while machine indicates dehumidifying --------------------------------- 134 3.1.3 Notes of updating the FW from earlier than ver1.5 (Scan Address/E-mail Title & Text) ----------------------------------------------------------------------------------------------------------------- 135 3.2 Error code 3.2.1 C-2451, C-2452, C-2453 and C-2454 occur ----------------------------------------------------------- 138 3.2.2 C-3102 ADU wiring connector is disconnected -------------------------------------------------------- 139 3.2.3 C-4521, color registration unit is not positioned correctly ------------------------------------------- 142 3.3 Others 3.3.1 Options cannot be recognized. System configuration display without options ----------------- 145 3.3.2 How to eject developer -------------------------------------------------------------------------------------- 146 3.3.3 Image shift ------------------------------------------------------------------------------------------------------ 148 3.3.4 Hard to pull out process mount ---------------------------------------------------------------------------- 150 3.3.5 Note for the developing shutter installation work ------------------------------------------------------ 153 3.3.6 Productivity decrease at first in the morning under low temperature, low humidity ----------- 155 3.3.7 Release of productivity down mode for small size print under high temperature ------------- 156 3.3.8 ADU MT lever is very hard to release -------------------------------------------------------------------- 158 4 Options 4.1 PF-707 4.1.1 Multi-feed of Plain Fine paper under high temperature and high humidity ---------------------- 160 4.1.2 PF-707 Wrinkle on paper ----------------------------------------------------------------------------------- 161 4.1.3 PF-707 Paper skew of small size ------------------------------------------------------------------------- 162 4.1.4 PF-707 Corner fold (dog ear) and conveyance JAM of small size -------------------------------- 165 4.2 PF-602m -2- 2 FS-532 4.175 -3- . KONICA MINOLTA Confidential 4.2.1 Irregular correspondence of the main tray exit -------------------------------------------------------.3.1 J-1710 countermeasure ------------------------------------------------------------------------------------.166 4. On simplex printing. • 1st transfer roller Approx 69mm interval • Opposing roller (?) Approx 75mm interval • 2nd transfer roller Approx. 861mm interval. Table of contents -4- . KONICA MINOLTA Confidential 1. 75mm interval. the symptom occurs on 2nd side.1. 44mm cycle in a single color • Intermediate transfer belt Approx. clean and replace the subject parts. 188mm cycle in a single color • Developing unit Approx. (2) Cause • Drum unit Approx. Cyclic white spot/black spot (1) Symptom White spot/black spot repeatedly occurs at a certain cycle.1. 3. 311mm interval. Solution After specifying the problem parts. • Fusing belt Approx. KONICA MINOLTA Confidential 1.1.2. Color Spots due to soilage inside machine (1) Symptom After pulling out the process mount and re-install it, color spots appear at the leading edge on the first ten prints. (2) Cause While pulling out the process mount, developer and toner coming out from the toner entrance and toner exit of the developing unit. It drops on the paper path, attaching to the paper and resulting in the color spots. Toner exit Toner supply opening -5- KONICA MINOLTA Confidential (3) Solutions 1. Check the condition of toner filter box (A50UR70A) at machine left bottom. When the toner attaches too much, replace the toner filter box (Fig. 1). Then, clean following 3 locations; ● The process mount where the developing unit is installed (Fig. 2) ● Exhausting duct mouth at inside machine at machine rear (Fig. 3) ● Drum unit stay (Fig. 4). Note ● Once toner spills, when process mount is pulled out and push back, the charging corona may be soiled. To prevent that, remove all the charging coronas before pulling out the process mount. ● Do not expose the drum to the light.  Fig 1: Toner filter box, Fig 2 Process mount at machine rear left bottom Drum cartridge stay Fig. 3 Where to clean (inside machine) Fig. 4 Drum unit 2. Check whether the transfer belt cleaning unit (A50UR706) and nearby area and separation claw unit gets soiled. If it is soiled too much, clean it or replace it. -6- KONICA MINOLTA Confidential Transfer belt cleaning unit Separation claw unit 3. Check whether IDC sensor unit upper and main body ceiling gets soiled. If it is soiled too much, clean it. Color registration unit Main body ceiling 4. Clean the toner at the paper path Clean the positions A, B and C with cloth (or vacuum cleaner if it is soiled too much) to (←○→) arrowed direction Note • Should not wipe to (←×→) direction because toner falls. A. Transfer guide plate/Lw B. Paper path steel plate 1 ○ C. Paper path steel plate 2 × 5. Clean the separation discharge unit with the blower brush. Clean the transfer guide plate /Up. Note • When cleaning the black sheet attached to the upper guide of 2nd transfer section of paper path, gently wipe it. Never rub firmly. If it is too dirty, replace it. When the black sheet gets torn or wavy, line or banding appear on image. • When cleaning separation discharge plate ASSY, do not touch the top of needle. If the needle got bent or broken, thin paper separation failure or line may occur. -7- After cleaning. Table of contents -8- . remove the unit and conduct cleaning mentioned in the roller replacement procedure. 6. KONICA MINOLTA Confidential Separation discharge plate unit Black sheet If the soilage still remains. make 10 sheets of blank print in A3 to clean the paper path. See the sample through the loupe with magnification x40 and look carefully the color spots. (2) Cause When the temperature is high or the internal temperature increases too much. After changing the setting. Print 10 pcs of test chart No53 with the density setting 255 and 128. go to (Solution "1") • For the soft clumping. conduct maximum density adjustment. take corrective action from the frequently seen symptom. Service mode→[Process Adjustment]→[Process Fine Adjustment]→[Background Margin Fine Adj. Service mode →[Process Adjustment]→[Drum Peculiarity Adjustment]]→[Gamma Automatic Adjustment] 3. conduct the Gamma Automatic Adjustment. it can be -9- . • It is impossible to completely solve the soft clumping or carrier attachment issue. KONICA MINOLTA Confidential 1. print A3 with 15 % coverage by 100 sheets. Check the maximum density and if it is different from target. some of the above is mixed. However. For example. In many cases.) Note • Check that AC bias and AC frequency is set to “0”. the better against the color spot. Confirm that the color of the core then conduct following for the responding color. How to classify the cause Print test chart No53 with the density setting 255 and 128. • Front & Back adjustment is disadvantageous against white spots. Conduct Background margin fine adjustment. So. • For the carrier attachment. the cause of color spots on the magenta halftone could be attachment of carrier of other color (Y/C/K) or toner (soft clumps). 2. (Confirm the variance of the occurrence. Color spots (black spots) (1) Symptom Color spots (black spots) occurs Yellowsoft Yelllow softcakeing clumping Magenta soft clumping Black carrier For human eyes. However it is disadvantageous against the developing memory problem. then see the improvement level. 1. Around the core. all looks like black spots on the print.] Change the setting to minus direction by 1 to 4 steps. Utility/Counter →[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Front & Back Density] Change the value by 1 to 2 steps to minus direction. • After replacing developer to new one. the toner or carrier forms core.1. if total 10 spots or over is seen in the entire A3 in solid or halftone. The lower the Duty. transfer failure (1st transfer/2nd transfer) occurs and spots appear. So please observe carefully. go to (Solution "2" or "3") (3) Solution 1.3. Check the environment and use condition of the machine • Ambient temperature (The room temperature 30 degrees C and over is not allowed. go to “3. and less than 5% Once 5% or more None • Life of Transfer cleaning blade 50% or more Once → If this does not improve. If the symptom is improved. • Toner storage condition (exposed to sun-light etc) 2. conduct less than twice. print 50 sheets of test chart No. toner hopper section and toner conveyance path then replace developer. Table of contents . 2. 3. Toner issue (environment dependent) 1. 53 (with 255 setting) in the problem color on A3 to eject the soft clumping inside the developer for improvement. Conduct toner refresh mode and check whether ejecting soft clumps is effective. KONICA MINOLTA Confidential improved. Number of times of Toner refresh: Twice If following condition(s) are applicable.10 - . Toner issue (environment independent)”. Toner issue (environment independent) Clean (or replace) toner supply.) • Whether there was a occasion that internal cooling system did not function: JAM or SC during continuous print • Whether customer turn OFF main power switch just after completing printing daily. • Coverage (Last 5000 prints) 3% or more. (3) Solution While checking the image. uneven density or carrier attachment may occur. reduce the value of the Develop AC Bias Fine Adj.11 - . White Spot due to the developing leakage (foreign material) (1) Symptom White spots occur on the solid image. check the image when changing the settings.] When the setting is changed. Then. abnormal discharge occurs against the photoconductor drum. Therefore. KONICA MINOLTA Confidential 1. A conductive foreign material attaches to the developing roller surface and is conveyed to the developing nipping part.1. Service Mode →[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Bias Fine Adj. This appears as white spots.4. conduct gamma automatic adjustment. ← Paper feed direction White spots due to the developing leakage (2) Cause Foreign material which is conductive attaches to the surface of the developing roller and abnormal discharge occurs. Note: Background. it is affected by the developing AC bias. Table of contents . the certain rate is added to the tray setting. When the administrator setting is used.] At 2nd Transfer output adjustment. KONICA MINOLTA Confidential 1. change the value by every +10 and find the optimum value. adjust the 2nd Transfer-Lead Edge and 2nd Transfer-Rear Edge in the same screen. the paper sometime gets dried depending on the ambient moisture. Machine → [Paper Setting] → [Change Set] → [Process Adj. Table of contents .1 to 1mm occurred. (3) Solution (a) At tray setting. the toner repels and white spots appear on print. [2nd Transfer Front]] or [2nd Transfer Back].1. Then the symptom tends to occur easily. When the paper is exposed to the ambient air for days or left inside the PFU for days. the change is applied to all the output. Change the DIPSW 1-0 from 0 to 1 to show the process adjustment in the paper setting. Note: On the thick paper. White dots from 2nd transfer unit (1) Symptom Many white dots in the diameter φ0.10% find the optimum value. Like the step (a)-2. To optimize the leading edge/trailing edge setting. (c) Optimize paper state White dots is effect of the abnormal discharge of the paper.5. At the discharge spot on the paper. Change the 2nd transfer output corresponding to the symptom location. If the adjustment of tray paper setting is used. [Service Mode] → [System Setting] →[Software DIPSW Setting] → DIPSW01-0:1 2. the leading edge/trailing edge transfer output is stronger or weaker than the other part. adjust the 2nd Transfer-Lead Edge and 2nd Transfer-Rear Edge in the same screen. (2) Cause While transferring toner from the belt to paper. (b) Change 2nd transfer output in the administrator setting. change the 2nd transfer output 1. the resistance difference due to the paper generates abnormal discharge on the paper at the transfer nip. To optimize the leading edge/trailing edge. Note The transfer output at lead edge and trail edge is stronger/weaker than the other part. [Utility/Counter] → [Administrator Setting] → [System Setting] → [Expert Adjustment] → [Process Adjustment] → [01 Front & Back Density] Check the symptom occurring side and adjust the value of the corresponding side.12 - . Change the value by every . Try just unpacked paper. . (2) Cause The mixture of the wax in the toner and the paper powder attaches to the roller and conveyed to the paper. Pull out the ADU mount.13 - . Attachment of white dusts like a eraser shaving on the paper (1) Symptom At the leading edge of the 1st print (to a few sheets later).1. Rotate to arrowed direction gradually and clean the dusts from the surface of the roller. open the reverse unit and clean the roller with the cleaning pad and drum cleaner. around φ1mm size white or black dusts. Caution The symptom tends to occur when the fusing unit is cool at the 1st in the morning. So cleaning before start printing is effective. clean the fusing paper exit roller. First thing in the morning. At periodic cleaning or spot cleaning. (3) Solution 1.6. KONICA MINOLTA Confidential 1. Replace "Fixing paper exit roller/Up" with "Fixing paper exit roller (A1DU7225)" of C7000 series.14 - . Table of contents . KONICA MINOLTA Confidential 2. ] * Which method you take.53 and judge which of the following 4 patterns they apply. Use the Dot1 screen. (2) Print the following test pattern using paper bigger than A3 size.15 - . Set the density to 0 for all the colors other than you print.53: Print each of YMCK in single color and in density 120 and 255. set the density of YMCK to 120 and print the 4 color gray. • Select No. (a) There is line on image in the paper feed direction. Paper feed direction Paper feed direction . Use the Dot1 screen.2.1 Line and uneven density countermeasure flow (1) How to distinguish the line problem and uneven density problem Conduct the gamma auto adjustment [Service Mode]→[Process Adjustment]→[Drum Peculiarity Adj. (d) Both line and uneven density exist. (3) Check the print result of No.53. • Select No.]→[Auto gamma adjustment]→ [Adjustment]→[Execute Adjustment Operation]→[Auto Gamma Adj. Paper feed direction Paper feed direction (c) No line but uneven density entirely.58 and set the density of MCK to 120. (b) There is line on image crossing the paper feed direction (c) There is no line but uneven density on the entire paper. (a) Line in the paper feed direction. • No. KONICA MINOLTA Confidential 1. (d) Both line and uneven density can be seen. (b) Line crossing the paper feed direction. there is no difference in operation. 188mm pitch. intermediate cleaning blade. KONICA MINOLTA Confidential (2) Apply countermeasure per symptom (a) There is line on image in the paper feed direction Check Test pattern No. replace the intermediate transfer cleaning blade. white line: Intermediate transfer belt. Apply countermeasure per occurrence interval. When line is extended over the entire paper Replace the intermediate transfer belt. 311mm pitch. Check the interval of line occurrence. which was printed in Step1-(2). Check which of the following pattern [1] to [3] they apply. intermediate transfer cleaning blade.16 - . No line on Test pattern No. 2nd transfer roller/Up or fusing upper belt.53. When line is cut in each color Check whether the line of subject color is in dark color or void in white. Apply countermeasure per pattern 1. Gloss line. 2. . 2nd transfer roller/Up Note Among color lines. And then replace the probable failure parts of Y. which was printed in Step1-2. scratch on the drum surface .58.In case of approx. for the mixed color line. 2nd transfer roller /Lw. Check that the line appears in the same position on both “Test pattern No. And also check that the line is in colored or in white. Color line: Drum cartridge White line: Charging corona unit 3.58. 1 Feed direction 3 2 1. Charging corona unit White line: Charging corona unit (b) There is line on image crossing the paper feed direction 1. Colored line: Drum cartridge. Color line. scratch on the fusing upper belt . If the imperfect cleaning is confirmed. 255” and “4 color gray test pattern” which were previously printed. Replace the probable failure parts.In case of approx. 2nd transfer roller/Lw. check the cleaning section of intermediate transfer section.53 in Y=120. Check Test pattern No. line due to toner coming off: Fusing upper belt 2. Line may be caused by Y. Conduct [Density Balance Adjustment]. scratch or soilage on the 1st transfer roller. Conduct [Automatic Gamma Adjustment]. Setting]→[System Setting]→[Expert Adjustment]→[Quality adjustment]→[Printer Gamma Offset Adj. Remove the causes of line by conducting the countermeasure for case A and B. Caution When replacing the failure parts. conduct the countermeasure for case C. Clean or replace the parts which are applicable to the pitch interval. If there is no improvement by replacing parts. Conduct [Color registration adjustment]. 2. 75mm pitch. Conduct [Gamma offset adjustment] [Service mode]→[Machine Adjustment]→[Quality Adjustment]→[Printer Gamma Adjustment]→[Gamma offset adjustment] [Utility]→[Machine Admin. Table of contents . consider other causes.17 - . 44mm pitch.] 3.In case of approx. replace with the prepared new parts. Upon knowing how the symptom is improved with the replacement. KONICA MINOLTA Confidential . . developing sleeve’s developer conveyance failure . [Adjustment]→[Density Balance Adjustment] Refer to [Density Balance Adjustment].In case of approx. 69mm pitch.] 4. (d) Both line and uneven density can be seen 1.] → [Adjustment]→[Execute Adjust Operation]→[Color Registration Adj. 2. (c) There is no line but uneven density on the entire paper 1. soilage of the 2nd transfer roller etc. When the line became less visible. do not jump to replace with the brand new parts but try using the old parts attached to used machines. [Service mode]→[Machine Adjustment]→[Printer Adjustment]→ [Color Registration Adj.In case of approx. (c) White line appears on black solid under high temperature and high humidity environment. It appears as line on image. . Foreign material such as dust and toner attaches to the writing path and block laser light. 2. If the line is seen in bristle. • Soilage on 2nd transfer roller/Up When the 2nd transfer roller/Up is soiled.2. White lines (to sub-scan direction) (1) Symptom White lines to sub-scan direction (paper feeding direction) Paper feeding direction (2) Cause (a) Line appears in single color • Charging caused line (drum potential failure) 1. Though drum is exposed. • Developing unit caused line Check the bristle of developing unit of applicable color. the grid potential control becomes poor. the cause is foreign material caught between developer regulating blade and unit. the potential does not decrease and white line appears. 3. Drum surface potential increases at the part corresponding to the soiled grid.2. The line appears at the high resistance part because transfer ability becomes poor. • Drum scratch caused line Photoconductor drum of matching color got damaged. the resistance varies in feed direction. (b) Sharp white line appears in single color • Foreign material in the laser beam path.18 - . KONICA MINOLTA Confidential 1. When the toner soils charging grid. replace the part. clean the 2nd transfer roller/Up with dry unwoven fabric. the resistance on the belt changes and poor transfer occurs. Do not use moisture because the line gets worse. KONICA MINOLTA Confidential (d) White line commonly appears on all colors • Soilage on backup roller • Transfer belt filming/scratch Filming tends to occur when low coverage or small size less than B5 or 5”1/2×8”1/2 is frequently printed. Use the non-woven fabric (hydro-wipe 65AA-9920). (f) Transfer belt filming Conduct Belt refresh mode (Maximum one time). If the symptom is not solved. A3x 5 sheets equivalent toner is consumed for cyan and magenta.19 - . Fusing belt may get marks from previous papers. developing unit lower protruding part) (e) 2nd transfer roller/Up gets soiled When 2nd transfer roller/ Up gets soiled. If the line is not the density level difference but the gloss difference corresponding to the small size paper edge. (b) Developing unit caused line Replace developer and clean the developing unit (c) Drum scratch caused line Scratch on the photoconductor drum of respective color (d) Foreign material in the laser beam path Clean the soil and dust which blocks the light with unwoven fabric. equipped to the machine. 2. problem such as cleaning failure may occur. It appears as white line. (Especially. replace the fusing belt. Clean charging grid. By one operation. Be sure to use dry fabric. Table of contents . Clean the charging wire with the cleaning material. [Machine]→ [Adjustment]→[Execute Adjust Operation]→[Belt Refresh mode] Note Do not perform toner refresh mode and belt refresh mode over set times. Otherwise. (e) White band commonly appears on all colors • Transfer belt filming (3) Solution (a) Charging caused line (drum potential problem) 1. Once the filming occurs on intermediate transfer belt. lower the fusing temperature as follows. gloss line may occur on image. (2) Cause When paper passes through the fusing unit. Change DipSW1-0 to 1 to display process adjustment in Paper Setting.3. 2. Change of fusing temperature If the symptom is not improved enough by performing “1”. gradually decrease (maximum by 20°C). (3) Solution 1. 69. Default Pressure Release Knob Note • Be sure to align the knob with the mark. KONICA MINOLTA Confidential 1. Change pressure of the fusing paper exit roller Change pressure of the fusing paper exit roller to release position. • When releasing the fusing paper exit roller. which lowers the temperature of contacting area. If not enough. Do not set to unmarked position.2. paper cannot feed. Gloss line caused by fusing paper exit roller (1) Symptom When printing the high coverage original. reduce by 10°C for the first step.20 - . 4 imposing postal card can feed. Print 20 sets of test pattern No. Table of contents . if the length of conveyance direction (FD) is shorter than A4. and confirm that fusing under does not occur. The difference of gloss level between contacting area and non-contacting area causes gloss lines. However. [Paper Setting]→[Change Set]→[Process Adj]→[Upper Fusing Roller Temperature] When changing the temperature. the fusing paper exit roller and the paper surface contact each other. 2.4. It is conveyed to the photoconductor drum through the intermediate transfer section.21 - . the image written on the drum at the instant reflects the vibration and white banding appears. The distance between the 2nd transfer section and the drum writing position are 104mm and 208mm. Banding in the main scan direction on halftone image printed on thick paper(Jitter problem) (1) Symptom When printing halftone image on the thick paper. (Refer to the figure below) 208mm Laser write position . slight vibration is generated. Affected by the thickness and stiffness of paper. 208mm Feed direction 104mm (2) Cause Vibration generated when thick paper hitting the entrance When thick paper hits the 2nd transfer section entrance. *Banding mainly appears when using paper weighting 300gsm or more. banding may appear in paper weighting less than 300gsm. banding may appear at the 104mm and the 208mm from the leading edge of paper. Consequently. KONICA MINOLTA Confidential 1. Toner scattering can be reduced by changing setting of DipSW 44-5. In that case. 3% for 3. [Paper Setting]→[Change Set]→[Process Adjustment]→[Next]→[Temperature of Upper Fusing Roller] • 257g/m2 or more : Tray from +5°C. With this setting. toner scattering inside machine may occur. To prevent that. [Paper Setting]→[Process Adjustment]→[Thick Bk mode] • When the Thick Bk mode is enabled. it is recommended to turn off the [Thick Bk mode] when it is not required. • After changing the screen type. 1st transfer roller of Yellow. If Improvement level is not enough. fusing duration is decreased and fusing problem possible occurs. the productivity decreases. resolution is reduced. replace the blade of the intermediate transfer cleaning unit. Consequently. [Service mode]→ [System Setting]→[Software DipSW Setting] 2. Also. When selecting the step 1. the effect of the setting change may not appears. If the solution 1 and 2 is not enough. Change DipSW1-0 to 1 to display Process Adjustment to Paper Setting. Changing the screen type. turn ON [Thick Bk mode] to ON. Magenta and Cyan is consumed. • When the developer is deteriorated. developing unit. Change the setting to use lower paper weight than actual paper to increase line speed. drum. 44-6 (for Band creation control) Rough indication is. Note • When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count.000 pages in Thick Bk mode. the paper distance is enlarged at once in every 100 pages. Setting]→[System Setting]→[Expert adjustment]→[Quality Adjustment]→[Custom Screen] • Dot175 (Screen 2 at default) is recommended. increase the temperature. However. 2. cleaning failure may occur. 3. In Process Adjustment of Paper Setting. Up to +20°C setting is available. It makes the line less visible. If the symptom is not improved enough by performing “1”. Therefore. . [Paper Setting]→[Change Setting] → [Paper Weight] • 257g/m2 or more : Select 217 to 256g/m2 • 177 to 256g/m2 (For low temperature environment): Select 92 to 105g/m2 • 177 to 256g/m2 (For other than low temperature environment): Select 136 to 176g/m2 2. perform [Gamma offset adjustment]. KONICA MINOLTA Confidential (3) Solution 1. process related parts such as charging corona. even for the single Bk printing. • Also. When the band creation setting is enabled. KMI recommends to replace the developer together. try following procedure 1. the toner not used in the image is also consumed. 1.22 - . YMC 1st transfer roller is in pressed state and that is effective to reduce vibration. change the Fusing upper roller temperature. even for the single Bk print. developer. By changing from Screen 1 to Screen 2. [Utility]→[Machine Admin. Additionally.23 - . If the improvement level is not enough. If improvement level is not enough. 4. • 177 to 256g/m2 paper with 136 to 176g/m2 setting: Try from +10°C. depending on paper. banding cannot be solved completely. please request your customer to try another kind of paper. increase the temperature. Up to +20°C setting is available. Table of contents . KONICA MINOLTA Confidential • 177 to 256g/m2 paper with 92 to 105g/m2 setting Try +20°C setting. decrease the maximum density of the problem color. Table of contents . (2) Cause (a) High toner charge under the low humidity environment When toner charge is increased under the low humidity environment. • If the symptom is not solved by increasing the 1st transfer. Note • Increase 1st transfer current of all color(Y/M/C/K) from [Front & Back Density] by 5% for all colors then check the result. (b) Excessive toner amount at 1st transfer If the above procedure does not solve the problem. the leak occurs at the 1st transfer section. Too much increase: Image memory may occur in the photoconductor drum cycle (188mm cycle). try to decrease the current. Too much decrease: White spots may occur. Line like ripple on image (1) Symptom Unevenness in the main scan direction (CD) occurs on solid image with 2 (or more) colors. the leak occurs at the 1st transfer section. • Be sure to check the image during adjustment because excessive adjustment may cause following problems. KONICA MINOLTA Confidential 1. [Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Process Adjustment]→ [Front & Back Density] After adjust "Front & Back Density" and return the "Machine" display. Change every -2 steps. Perform automatically "Gamma automatic adjustment".24 - . Be sure to confirm if the symptom is improved. decrease the max density and reduce the toner amount to be transferred at 1st transfer.2. (3) Solution (a) High toner charge under the low humidity environment Perform the 1st transfer density adjustment. [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Maximum Density Adjustment] After reset the transfer current adjusted at step (a) to 0.5. (b) Excessive toner amount at the 1st transfer section When the density is high at the solid 2 color section. 2. Table of contents . the temperature inside machine increases and the waste toner clumps inside the belt cleaning unit. This causes cleaning failure and toner may attach to the belt.25 - . (a) After turning OFF the sub-switch. KONICA MINOLTA Confidential 1. (b) Main power switch is turned OFF while the copy button is lighted in orange (3) Solution (a) Don't turn off the main power switch during the massage is appearing. Waste toner packing (1) Symptom Image is soiled in paper feed direction (sub-scan direction) (2) Cause Under following condition. the main switch is turned OFF though "Cooling in progress" is displayed. (b) Don't turn off the main power switch during the start button is lighting in orange.6. When the roller rotates. The density difference appears. KONICA MINOLTA Confidential 1. Select [Down] for the Development Output Setting [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment] →[06 Process Adjustment]→[Development Output Setting] • By the above setting. the gamma automatic adjustment is started. be sure to adjust carefully. Table of contents .7. darker image after 44mm from white area (text or image) < Darker area up to 44mm from the leading edge> < Darker after 44mm from white area> 44mm 44mm (2) Cause At the area before the image or white area. Darker image up to 44mm from leading edge or after 44mm from white area (Developing memory) (1) Symptom Darker image area up to 44mm from the leading edge. to display Development output setting in the Expert adjustment.2. Decrease development output from the expert adjustment. [Service mode]→[System Setting]→[Software DipSW Setting] 2. After passing white area After passing solid part (3) Solution 1.26 - . Change DipSW 46-2 to 1 (default: 0). • When returning to normal screen. Therefore. Or. the developer is replaced but the toner layer is not removed. • When Down is selected for the Development Output Setting. the developing duty ratio is changed from 30% (Satndard) to 50% for all colors. the toner is easily developed on to the developing roller and the toner layer is formed on the developing roller. The image density changes when the toner layer is gone (From the 2nd rotation of the roller). banding on background may appear. (At the 1st rotation of the roller). 2. the banding is created at the 2nd transfer. and the speed differs between the 2nd transfer and fusing unit. 130mm 65mm Feed direction Leading edge Trailing edge 端 1. Lines or banding to the main scan direction (CD) due to speed difference between 2nd transfer and fusing (1) Symptom Lines or banding occurs on thick and highly stiff paper in main scan direction (CD). Enlarged figure . the paper loop becomes larger between fusing and the 2nd transfer. KONICA MINOLTA Confidential 1. (2) Cause When the print paper is thick and highly stiff.8. the paper is pushed back and the banding occurs at 2nd transfer unit. When the paper is released from registration or the trailing edge of the paper passes the registration guide plates.27 - . (a) When the fusing speed is slower: Banding appears at around 130mm and 65mm from trailing edge (for A3 size) When the fusing speed is slower. Feed direction Trailing edge 2. Print a test pattern with following conditions ● Paper type and weight: The same as the problem paper ● Size : A3 ● Chart : Test pattern #53 ● Color : Bk ● Density : 150 ● Quantity : 15 sheets 2. Continue fine tuning checking the adjustment result.28 - . Table of contents . Unable to specify the occurrence position. the banding occurs at 2nd transfer section. Repeat the above step 1 through step 3 to get the optimum settings. Adjust fusing speed [Machine]→ Paper Setting]→[Change Set. Note Change by 10 steps at the beginning. Therefore. Enlarged figure (3) Solution 1. The banding appears according to the fusing roller cycle and occurrence position on image is not constant. KONICA MINOLTA Confidential (b) When the fusing speed is faster: Banding position varies When the fusing speed is faster.]→[Process Adjustment]→[Fusing Speed Adjustment] Banding position Like Enlarged figure1 Like Enlarged figure 2 Adjustment direction [+] : Increase fusing speed [-] : Decrease fusing speed 3. Check the test pattern printed at step 1 and change the setting. 4. the paper is pulled against 2nd transfer unit. ● Width of band : Width of charging corona (approx 18 to 20mm) ● Cycle : Drum (approx 189mm) Sub scan direction (FD) Drum cycle (approx 189mm) (2) Cause A product resulting from ozone attaches to the surface of the photoconductor drum.9. Consequently. for Auto Shut OFF Timer Setting.min. [Utility/Counter]→[User settings]→[System Setting]→[Power Save Setting]→ [Power Save Function Setting]→ Set --. image gets blurred. it absorbs moisture. (b) Keep sub-power ON (Do not turn OFF sub-power switch) Table of contents .29 - . when a product resulting from ozone attaches to the photo conductor drum. (3) Solution Enable drum tiny rotation mode (a) Set auto shut off to [---min]. Image got blurred affected by ozone (cyclic white band) (1) Symptom Cyclic white band occurs. Under high humidity environment.2. This reduces resistance of the photoconductor drum surface. KONICA MINOLTA Confidential 1. KONICA MINOLTA Confidential 1. when the toner charging amount decreases. • It occurs only on the 1st sheet and not occurs on the 2nd sheet. • It occurs when the speed mode is selected (default setting) and not occurs in quality mode. transfer output becomes too high. the image remains on the drum surface as latent image.2. (b) Symptom (b) 1st transfer ON timing is reflected to the drum. Feed Direction 58 or 115mm 170mm (2) Cause (a) Symptom (a).10.30 - . the previous latent image affects. Photoconductor (Drum) memory (1) Symptom (a) The previous image appears as density difference at the 188 mm later position (drum rotation cycle). C C B B A Feed 通紙方向 A Direction 188mm (b) Band in CD occurs on 1st sheet. The lower drum potential is selected by the image adjustment. (3) Solution . when the toner charge amount decreases. the developing ability increases. The position is up to 58mm (or 115mm) from leading edge and up to 170mm. When the drum potential is low. As the result. (b) common • 1st transfer output is too much Mainly under high humidity environment. • Drum potential decreases Mainly under high humidity environment. the Development Output Setting can be changed. Change the DipSW 46-2 from 0 (default) to 1. 3. spots may occur. 2. (b) Symptom (b) Change 1st transfer output timing [Service Mode]→[System Setting]→[Software DIPSW Setting] Change DipSW 46-0 from 0 (default) to 1 • Note Since the transfer output is turned on from 1 rotation earlier. No control Decrease level Decrease level (default) Middle Large 41-0 0 1 0 41-1 0 0 1 When the depress level is set large. the above DipSW 46-0=1 sequence is taken regardless of the dipswitch setting. When quality mode is selected. the first copy out timing slightly increases. Gamma automatic adjustment starts when returning to the normal screen. Note When the value is reduced too much. the drum life may be shortened slightly. KONICA MINOLTA Confidential (a) Symptom (a) 1. transfer failure (paper surface state is reflected to image) may occur. Then. Table of contents . When the Development Output Setting value is reduced. Setting to depress memory [Service Mode]→[System Setting]→[Software DIPSW Setting] Dip-SW No. Reduce developing ability [Service Mode]→[System Setting]→[Software DIPSW Setting] 1.31 - . maximum density may increase. Since number of the drum rotation increases. Reduce 1st transfer [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Process Adjustment]→[Front & Back Density] Reduce the value for 1st Transfer Y to 1st Transfer K by 5% and check the image. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Process Adjustment]→[Development Output Setting] Gamma automatic adjustment starts when returning to the normal screen. Adjust the value by the unit of 1 % and see the image. However. conveyance speed is slow and the developer is not conveyed enough to the edge and not supplied enough to the developing roller. Execute toner refresh mode. Update C-ROM to G00-17 or later. In the developing unit.32 - . BK 2%) job continuously. When the less than Color 3%. BK 2% coverage is printed continuously. Execute toner band creation function (Color 3%. By using toner band creation function. 2. the transfer ability become stable. the toner is regularly ejected from the developing unit. When printing low coverage (less than Color 3%. KONICA MINOLTA Confidential 1.11. When the Color 3%.2. (3) Solution 1. BK 2% or more coverage job is printed. the developing screw conveys developer to the developing roller.BK 2%. Note: When the machine has stopped for 3 days or more. conduct less than twice.  Coverage (Last 5000 prints) 3% or more. and less than 5% Once 5% or more None  Life of Transfer cleaning blade 50% or more Once 3. Developing screw mark (at low speed) (1) Symptom Slant white lines in screw pitch occurs at the machine rear side. Machine 用紙奥側 rear Feed 通紙方向 Direction 用紙手前側front Machine (2) Cause Toner density may down in a developing unit. BK 2%). conduct twice regardless of the following conditions. Color(Y/M/C) 3% setting DIPSW44-5 : 1 (Default: 0) DIPSW44-6 : 1 (Default: 0) BK 2% setting . at the low print speed. transfer ability for emboss paper becomes poorer as the toner inside the developing unit gets deteriorated. printing temporary stops and toner band is created on the intermediate transfer belt to keep minimum coverage becomes Color 3%. and fresh toner is supplied. [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Execute Adjust Operation ]→[Toner Refresh Mode]→[Cancel]→[Exit[UTULITY]] Number of times of Toner refresh: Twice If following condition(s) are applicable. when changing the setting. 2. print 1000 prints of 20% coverage original for all colors (Y/M/C/K). Back to normal screen Note When the developer conveyance speed at low speed is increased. [Service mode]→[System Setting]→[Software DIPSW Setting] Change the DipSW 46-4 from 0 (Normal) to 1 (Increase speed). To prevent 2nd transfer roller getting toner dirt from toner band. Therefore. Increase developer conveyance speed at low speed 1. replace the developing unit (developer). When the intermediate transfer CL blade count reaches more than half. If the immediate improvement is necessary. Note When the low coverage job was printed just before enabling the toner band creation. the cleaning failure may occur. DIPSW59-7 : 1 (Default: 0) 4. KONICA MINOLTA Confidential DIPSW49-6 : 1 (Default: 0) DIPSW49-7 : 0 (Default: 0) Side effect: Toner band creation setting reduces the productivity (Reduce by max 10% for A4 conversion) and increases toner consumption at low coverage printing. please confirm the actual print. the effect does not appear immediately because all the deteriorated toner is not ejected at once.33 - . sharp line may be easily seen. Conduct Gamma Automatic Adjustment [Service mode]→[Process Adjustment]→[Drum Peculiarity Adjustment]→[Gamma Automatic Adjustment]→[Start] 3. So. change the DIPSW for 2nd transfer unit pressure release setting. Table of contents . white or color lines to CD (main scan direction) occur.2. KONICA MINOLTA Confidential 1. • C1070 (Shifting at 2nd transfer) 89 108 Fusing roller contacts Fusing nipping start Cause/Solution (a) 252 266 290 358 Registration roller release High speed Middle speed Cause/Solution (b) Low speed Exit registration guide Cause/Solution (a) . Lines or banding on image due to speed change (shock noise) (1) Symptom On the thick or the hard paper. Note Depending on the paper posture.12. Check the lines position from the following figure and specify the cause location and apply solution matching the cause.34 - . the location on the actual paper may vary by +/-10mm. KONICA MINOLTA Confidential • C1060 (Shifting at 2nd transfer) 89 108 Fusing roller contacts Fusing nipping starts Cause/Solution (a) 237 245 265 359 Registration roller release High speed Middle speed Cause/Solution (b) Low speed Exit registration guide Cause/Solution (a) .35 - . KONICA MINOLTA Confidential • C1070 (Shifting at 1st transfer) 34 Previous sheet exit 2nd transfer Cause/Solution (b) 104 193 Enter to 2nd transfer 213 Cause/Solution (c) 356 370 Fusing roller contact 394 Cause/Solution (a) Fusing nipping starts Release registration roller High speed Middle speed Cause/Solution (b) Low speed .36 - . 37 - . KONICA MINOLTA Confidential • C1060 (Shifting at 1st transfer) 33 Previous sheet exit 2nd Cause/Solution (b) 104 transfer 193 Enter to 2nd transfer Cause/Solution (c) 213 341 350 370 Fusing roller contact Cause/Solution (a) Fusing nipping starts Release registration roller High speed Cause/Solution (b) Low speed . 38 - . KONICA MINOLTA Confidential • C1070 (Shifting at write unit) 76 77 138 82 Previous sheet exit registration guide 139 High/Low speed Cause /Solution (a) 143 Middle speed 208 Previous sheet exit 2nd transfer 297 High/Low speed Cause/Solution (b) Middle speed 317 Enter to 2nd transfer Cause/Solution (c) Fusing roller contacts Cause/Solution (a) Fusing nipping starts . KONICA MINOLTA Confidential • C1060 (Shifting at write unit) 33 47 Previous sheet exit registration guide 94 Low speed 75 108 Middle speed Cause/Solution (a) 137 High speed Previous sheet exit 2nd transfer 208 Low speed Middle speed Cause/Solution (b) 297 High speed 317 Enters 2nd transfer Cause /Solution (c) Fusing roller contacts Cause/Solution (a) Fusing nipping starts .39 - . shifting occurs at 1st transfer unit or write unit. pushed or goes back between 2nd transfer and fusing unit. The loop is formed the loop between 2nd transfer and between 2nd transfer and fusing unit is released. the paper which is just before 2nd transfer nipping is pulled or pushed or goes back between registration unit and 2nd transfer unit. the loop is fusing unit released and shifting occurs at the 2nd transfer. shifting occurs at 1st transfer or write unit. Depending on the paper hardness. when the registration is released. the shifting occurs at the 2nd transfer. (b) Changes due to the speed difference between fusing unit and the 2nd transfer. It is conveyed to the transfer belt and shifting occurs at 1st transfer or write unit. Depending on the paper position between registration and 2nd transfer unit. . • Fusing roller speed > Registration roller speed (2nd transfer roller speed) Pulled The paper is pulled When the registration is released. by paper and the loop is formed just the roller and 2nd transfer before the fusing unit. the paper is pulled.40 - . Mechanism of shifting at 2nd transfer • Fusing roller speed < Registration roller speed (2nd transfer roller speed) 2nd transfer roller Vt Goes back Registration roller Vr Fusing roller Vt When the registration is released. Or if it is conveyed to the intermediate transfer belt. The loop is pushed back and shifting occurs at 2nd transfer. KONICA MINOLTA Confidential (2) Cause (a) Changes due to the paper behavior at 2nd transfer When the paper enters to the fusing unit or exits from the registration guide plate and force relation at 2nd transfer is changed by the paper. between 2nd transfer and fusing unit pulls the paper and fusing shifting occurs at 2nd transfer ･ Fusing roller speed << Registration roller speed (2nd transfer roller speed) Stopped here When the paper enters to The registration roller pushes the the fusing and nipped. 2nd transfer shifts occurs. Or if it is conveyed to the intermediate transfer belt. (c) Changes due to the paper behavior between registration unit and 2nd transfer unit. Consequently. It is released unit. the shifting occurs due to the speed difference between the intermediate transfer belt and the drum. . KONICA MINOLTA Confidential Paper speed constantly When the loop is not slows down at 2nd formed enough. the transfer unit and image paper speed is slowed gets blurred. down and blurred image or banding appears. relatively clear lines occur. Mechanism of shifting at 1st transfer Intermediate transfer belt Vb Vｄ Drum 1st transfer position At the 1st transfer position.41 - . Belt speed > Drum speed: White line Belt speed < Drum speed: Black line The banding width varies depending on the degree of the change. lines or blurred banding occurs Mechanism of shifting at Write position Vd Drum Vd± Δ Vd PH Write position Write position shifts by the drum speed difference Drum speed > 0: White line Drum speed < 0: Black line The banding width varies depending on the degree of the frequency change. 3. reduce the pressure. Swap the drum with other color to see the state. Check 2nd transfer pressing release mechanism works normally. KONICA MINOLTA Confidential (3) Solution (a) Lines due to the paper behavior at the 2nd transfer 1. To reduce the force change at the 2nd transfer. 2. 2. (c) Lines due to the paper behavior at parts between the registration and the 2nd transfer 1. 3.42 - . 2. Check if the fusing guide plate/front is installed normally. Check the fusing roller rotation status (Whether roller rotation is smooth). Check if the pressure release mechanism is normal. Table of contents . Adjust fusing speed to depress the influence of the force change. Check the guide plates upstream of the 2nd transfer. (bending or fitting state of guide plate) (b) Lines due to the speed difference between the fusing and the 2nd transfer 1. Depending on the deflection level of the roller.43 - . Service Mode → [Process Adjustment] →[Process Fine Adjustment] →[Develop AC Bias Fine Adj. conduct gamma automatic adjustment. increase the Develop AC Bias Fine Adj. check the image when changing the settings. setting while checking the adjustment result.] When the setting is changed.13. Developing roller (44mm) cycle banding (different density) (1) Symptom Lighter or darker density bands appear at 44 mm cycle in CD direction. 44mm cycle (2) Cause Due to the developing roller deflection within the tolerance. (3) Solution To enhance developing ability. KONICA MINOLTA Confidential 1. developing efficiency of the photoconductor drum changes and the symptom occurs.2. Table of contents . white spot or carrier attachment may occur. Therefore. Note Background. Ds or Developer conveyance amount changes. perform toner refresh mode. [Utility/Counter] → [Administrator Setting] → [System Setting] → [Expert Adjustment] → [Execute Adjust Operation] → [Toner Refresh Mode] → Going back to usual screen. 3.14. darker or lighter density band occurs in 2-color solid (green). and less than 5% Once 5% or more None  Life of Transfer cleaning blade 50% or more Once 2.44 - . the Automatic Gamma adjustment is conducted. (2) Cause When the machine is left under high temperature environment. (3) Solution 1. It is not cyclic bands. It the step 1 does not solve the symptom. Table of contents . adjust the max density to achieve higher density. Going back to usual screen. This causes the high developing efficiency at the print start timing and the lines of different density created by the fine potential/fine vibration become visible. KONICA MINOLTA Confidential 1. Conduct print and increase toner charge amount.  Coverage (Last 5000 prints) 3% or more. the charge of the toner in the developing unit becomes low.2. [Utility/Counter] → [Administrator Setting] → [01System Setting] → [05 Expert Adjustment] → [06 Process Adjustment] → [02Maximum Density Adjustment] → Adjust the Y and C maximum density to the darker value. conduct less than twice. Irregular darker or lighter density band appears after leaving machine under high humidity environment (Green) (1) Symptom When the machine is left under high temperature and high humidity environment for long period. Print test patter No53. Number of times of Toner refresh: Twice If following condition(s) are applicable. the toner refresh is conducted. To increase toner charge amount. with Y and C gradation adjustment to 255 in A4 size and 100 sheets. Poor separation Noise from static electricity appears on image (c) Check the paper state • Use the paper just unpacked.45 - . (3) Solution (a) Widen the distance between papers (decrease CPM) • Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. 1. Copy Screen (Machine screen)→[Paper Setting]→[Change Set]→[Process Adj.2. the symptom occurrence increases. Jittering lines at trailing edge (1) Symptom Color lines or white lines occur at the one cycle of the fusing belt (310mm) from the trailing edge of the previous sheet. Do not increase much.].] • Select [Down] for [CPM Down]. scatters (color lines) or repels the toner (white line) on the image. Adjust Separation DC in the process adjustment. Previous 前紙 sheet Feed 通紙方向 direction Trailing edge of the 前紙後端 310㎜ 310mm previous sheet （定着ベルト1周分） (1cycle of fusing belt) (2) Cause The potential at the trailing edge of the thick paper is high. Note The productivity becomes one half so if it is not acceptable. (When the moisture in the paper is low.15. Increase [Separation DC (Front)].) • When the PF-707 heater is turned ON during night. • Plain paper Noise from static electricity appears on image • Coated paper Unable to control Wrinkle. the following symptom may occur. Note: When the separation DC is increased. It remains on the fusing belt and affect on the next sheet image. 3. Table of contents . Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Note When the humidity is high and the heater is turned OFF. (b) Adjust the Separation DC. KONICA MINOLTA Confidential 1. take the solution (b). 2. watch the lighter image density and wrinkles. turn OFF it. • Copy Screen (Machine screen) → [Paper Setting]→[Change Set]→[Process Adj. Table of contents .46 - . However. repeat it once more. Press OK then go back to the usual screen. Press [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation] →[Color Regist. the maximum times of execution is 3 times. drum unit. Because the cleaning blade failure may occur. 8mm interval is caused by the configuration of the auxiliary roller inside the intermediate transfer cleaning unit.2.16. Up to 2000 prints after replacing drum unit to new one. multiple FD lines in 8mm interval occur. 8mm interval FD lines (1) Symptom After replacing the drum unit to new one. Meanwhile. conduct color registration automatic adjustment. Adjustment is executed. KONICA MINOLTA Confidential 1. the lubricant is gradually transferred to the transfer belt then saturated. Auto.Adj]. intermediate transfer belt and intermediate transfer cleaning unit are replaced as a set. Feed Direction 通紙方向 Multiple8mm間隔の FD lines in 8mmFDスジ複数 interval (2) Cause Uneven transfer due to the uneven condition of the transfer belt surface. The symptom tends to occur especially when the transfer belt. If the lines cannot be reduced. the belt surface condition becomes uneven and uneven transfer occurs. (3) Solution To turn the unit to used condition. (b) Excessive neutralization Due to the same cause as (a). the different density area in FD direction appears.17. With this state. the image is affected by the electric field and image scatters and density looks darker. 160mm (b) At the approx. the static electricity suction power decreases. Where the toner is removed looks lighter and additional toner attached looks darker.2. Density change by static electricity (1) Symptom (a) At the 40mm to 160mm from the leading edge of paper.47 - . Unfused toner is affected by the electric field strongly and attach to the fusing belt. KONICA MINOLTA Confidential 1. the different density area appears in FD direction. (One cycle 画像先端 of Fusing belt) （定着ベルト1周） 310㎜310mm Paper lead edge Feed Direction 通紙方向 用紙先端 40～50㎜ 40 to 50mm from Paper lead edge (2) Cause (a) Excessive neutralization The excessive neutralization current is applied to paper then the static electricity suction power between paper and toner is decreased. 50mm and 310mm from the leading edge of paper. (3) Solution Adjust the neutralization current 1. when the paper enters to the fusing nip. The toner attaches to the fusing belt is fused on the image after one cycle of the fusing belt. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Feed Direction 通紙方向 edge 40 40～50㎜ From lead用紙先端 to 50 mm約160㎜ and approx. . Decrease Separation DC (Front) 4.48 - .] Adjust Separation Current. 3. feed failure may occur on thin paper. KONICA MINOLTA Confidential 2. Decrease Separation AC (Front) Note Please mind that after decreasing separation current. Adjust Separation DC current. the thin paper behavior may not be stable and wrinkle. Table of contents . Do not adjust excessively. Copy screen (Machine screen)→[Paper Setting]→[Change Set]→[Process Adj. (b) Clumps stuck between the blade and the transfer belt Lubricant and paper dust forms clumps. It does not matter condition. The condition to make much clumps is. paper type or job type.2. Then cleaning failure occurs. Too much clumps stuck between the cleaning blade and the transfer belt. Low coverage (less than 3%) prints Low to high coverage prints Plain and fine paper (produce much paper dust) Feeding direction Cause 1: Chipping cleaning blade . FD Lines and Banding (1) Symptom Black (or Gray) lines and bands in the feeding direction occurs on printout as well as on the surface of the intermediate transfer belt.49 - . it happens when printing.18. KONICA MINOLTA Confidential 1. (2) Causes (a) Damage on the edge of the belt cleaning blade The position of lines are always the same because the edge of the cleaning blade is chipped or malformed for some reasons. The position of lines are random. Enable the RFP function When printing with low coverage job continuously. Download the firmware below (frequent reverse rotation to clean clumps). This DIPSW executes only when installing new DU. after stopping print or after operation of reverse rotation of the transfer belt (because clumps cleaned once). KONICA MINOLTA Confidential Feeding direction Cause 2: Clumps (3) How to specify the cause (a) Chipping cleaning blade  Lines at specific position (always the same position)  Always happens (does not matter job type. lubricant becomes a lot on the transfer belt and increases risk of forming clumps. RFP can reduce the productivity.  It does not occur at the beginning of print job.  It starts thin lines and gradually becomes fat banding Go to the solution step 1. which is a known function to prevent too much lubricant.50 - .  The position is random. It occurs on different positions when switching jobs or after reverse rotation of the transfer belt. 2 and 3 (4) Solution How to prevent and solve 1. Replace the belt cleaning blade 3. C-ROM: G00-15 and onward 2. 4. If the cleaning failure occurs after Drum Unit distance% reaches to the 5%. The new DU applies especially much lubricant at the beginning. how many prints or so)  Mostly Lines Go to solution step 1 and 2 (b) Clumps  It occurs especially when continuous printing (after clumps are produced lot). change the . Change the setting of the "control change period setting when the drum unit is replaced". The RFP provides toner to the transfer belt cleaning the lubricant on it. and increase toner consumption when low coverage printing. Turn the DIPSW for RFP This DIPSW execute only when installing new DU. Procedure to enable the RFP (toner band creation) 1. and less than 5% Once 5% or more None  Life of Transfer cleaning blade 50% or more Once 2.  Coverage (Last 5000 prints) 3% or more. Execute Toner Refresh Mode [Administrator Settin]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode]→[back to regular display] After returning the regular display. when the RFP is enabled. 2nd transfer unit pressure release setting on RFP. DIPSW59-0 : 1 DIPSW59-1 : 1 Frequent reverse rotation to clean clumps can reduce the productivity. turn the default as below. KONICA MINOLTA Confidential DIPSW to the following settings. This may cause soilage on the 2nd transfer roller. To prevent it. Replace the cleaning blade When the foreing material from the lubricant attaches to the blade. Toner Refresh Mode is automatically executed. 3. the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. The soilage on the 2nd tranfer roller may transfer to the 2nd side of the paper and appears on the image. Number of times of Toner refresh: Twice If following condition(s) are applicable. DIPSW44-5 : 0 DIPSW44-6 : 0 4. DIPSW59-2 : 1 DIPSW59-3 : 1 4. Execute per 100 printing. conduct less than twice. When the RFP is enabled.51 - . DIPSW59-6 : 1 Caution If DIPSW44-5/44-6 were changed for FD lines and banding. blade replacement is necessary. release the 2nd transfer pressure. DIPSW59-7 : 1 Table of contents . Turn the DIPSW for reverse rotation to clean clumps. 5. Confirm the print and if the jitter line appears. KONICA MINOLTA Confidential 1. If the density difference is not improved. access Fusing Speed to adjust and enter the -150. [Service]→[System Setting]→[Software DIPSW Setting] While checking the actual print. (3) Solution From the process setting of the paper setting. 5mm cycle density different area occurs. adjust gradually within the adjustment range (Down to -200). the lower press roller speed changes and the image shifts on the 2nd transfer (= difference in density) appears. (2) Cause The 5mm cycle corresponds with the component of the fusing roller drive engagement.19 5mm cycle density difference caused by the fusing unit (1) Symptom On solid image at the later half of the image.2. . The gloss coat paper which is very smooth tends to create the symptom more. readjust within the range -150 to 0 and select the optimum value so that both symptom are the least visible. When the fusing unit pulls the paper. equivalent to 1 tooth engagement. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. enter -150 to the [Fusing Speed (Front)] and [Fusing Speed (Back Side Offset)] Table of contents . It is particularly visible on BK solid in LL environment with middle speed printing.52 - . JAM may occur.  Coverage (5000 prints) 3% or more. Number of times of Toner refresh: Twice If following condition(s) are applicable. Recommendation value: Color(Y/M/C) 3%. 53 with 255 until the line is gone. BK 2% . conduct twice regardless of the following conditions.20 Color lines in CD at 13mm from the leading edge (1) Symptom Black or color line appears at 13mm from the lead edge (2) Cause When the developer deteriorates due to drastic environment change. 13mm from lead edge (lighter at edge) Feed Direction Lead edge to approx. and less than 5% Once 5% or more None  Life of Transfer cleaning blade 50% or more Once (b) Print the solid with the line appearing color to supply new developer. [Service mode]→[Test mode]→[Test Pattern Output Mode] Print No. Note: When the machine has stopped for 3 days or more. KONICA MINOLTA Confidential 1. (c) When the symptom is repeated on the specific machine. Occurrence example (3) Solution (a) Conduct toner refresh mode to eject the developer so that new developer is supplied. 13mm Fig 1. conduct less than twice. set the toner band creation so that the new developer is supplied periodically. [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode]→Go back to normal screen to start adjustment.53 - . Note Print in single color. [Service]→[System Setting]→[Software DIPSW Setting] Change DipSW to change toner band creation interval.2. the toner image scatters just before the 2nd transfer nipping. If the 2 or more color included solid. When the band creation setting is enabled. KONICA MINOLTA Confidential DIPSW Setting 0% 15% 3% 5% Toner band DipSW 44-5 = 0 DipSW 44-5 = 0 DipSW 44-5 = 1 DipSW 44-5 = 1 creation DipSW 44-6 = 0 DipSW 44-6 = 1 DipSW 44-6 = 0 DipSW 44-6 = 1 setting (Default) Color(YMC) 0% 2% 3% 5% Toner band DipSW 49-6 = 0 DipSW 49-6 = 1 DipSW 49-6 = 1 DipSW 49-6 = 1 creation DipSW 44-7 = 0 DipSW 49-7 = 0 DipSW 49-7 = 0 DipSW 49-7 = 1 setting (Default) BK Note  When the intermediate transfer cleaning unit count reaches later part of the life count.  When the developer is deteriorated.54 - . In that case. cleaning failure may possible occur. KMI recommends to replace the developer together. the effect of the setting change may not appears. Table of contents . replace the intermediate transfer cleaning blade. (2) Cause When the lead edge of the paper passes the 2nd transfer section the 3 separation claws contactswitht he intermediate transfer. When the auto (default) is selected. When it is repeated.55 - . this may cause the scratch on the intermediate transfer belt surface or toner filiming of the belt. the thin paper may wrap the intermediate transfer 分 belt. OFF Always release: Claw does not function Note When the seperaton claw is always released.2. Paper weight Pressure 62 to 74gsm ON 75 to 80gsm ON 81 to 91gsm ON 92 to 105gsm OFF 106 to 135gsm OFF 136 to 176gsm OFF 177 to 216gsm OFF 217 to 256gsm OFF 257 to 300gsm OFF Contents Auto Auto: Claw function for specific paper ON Always pressed: While printing. (3) Solutoin It is possible to change claw press condition by the DIPSW setting. paper may enter to the intermediate transfer CL. the claw contacts with the pressure and released.21 White line due to separation claw mark (1) Symptom Separation claw slightly damages the intermediate transfer belt and it appears as the white line on the halftone image. the separation claw is released only for the paper less than 91gsm. Table of contents . If jam code is cleared without clearing the paper. KONICA MINOLTA Confidential 1. In that case.2. Gloss band in CD with margin width (1) Symptom Gloss band in CD which corresponds with the margin appears. curl may becomes larger depending on the paper type or environment. If the step 1 does not improve the symptom.]→[Process Adj.56 - . increase temperature of [Lower Fusing Roller Temperature] or use the curl adjustment of main body/RU. Reduce fusing temperature by every 5ºC to check the result. change the DIPSW1-0 (To show process adjustment in the Paper Setting) from "0" to "1" (Show). (One kind of gloss memory) (3) Solution 1. [Paper Setting]→[Change Set]→[Process Adj.] ･[Upper Fusing Roller Temperature] Note When the Process Adj. The same The same st as margin nd as margin 1 sheet margin 2 sheet margin width width 311mm 311mm 311mm (2) Cause ・Due to the affect of the wax component transferred from the fusing belt upper. the gloss difference appears by the cycle of fusingg belt upper (311mm).22.]→[Lower Fusing Roller Temperature] Main body [Curl Adjustment] RU [Paper Setting]→[Change Set.] →[Output Curl Adjustment] . is not indicated. change the temperature by every 5ºC within the adjustment range (±20 ºC and search the best setting which the sympotom does not eoccur easily. Note ･When the temperature is decreased too much. ・When the temperature is increased too much. [Paper Setting]→[Change Set. fusing under offset may occvur.]→[Process Adj. KONICA MINOLTA Confidential 1. 2. ・High temperature The wax amount difference at gloss history is big but entire gloss level is high and the gloss memory is not easily seen.57 - . ・Middle temperature Depending on the wax amount difference in the gloss history. the gloss memory is easily find. Table of contents . the gloss level is entirely low and the gloss memory is not easily seen. KONICA MINOLTA Confidential Tips ・Low temperature Regardless of the previous image. Machine tab→[Paper Setting]→[Change Set]→[Process Adj. (approx. it sticks on the belt more firmly on the belt and is not cleaned by the intermediate transfer belt cleaner.3m 431. the soilage to the CD direction the same as the lacking part occurs after one cycle of the intermediate transfer belt.2.23 Image lacks at the corner of the trailing edge (Soilage in main scan direction (CD)) (1) Symptom Image lacks at the trailing edge of the paper. (2) Cause Depending on the paper type (thin paper. fine paper etc). 862mm). It is retransferred on the next image then appears as soilage to CD direction.8mm) Soilage 80. the paper behavior becomes unstable after entering to the fusing unit. So enlarge the margin. (a) Move the writing position Set the smaller value for the lead edge trailing edge. At the same time. 872. Since the electric charge gathered at the paper edge is added to the toner attaching to the intermediate transfer belt. KONICA MINOLTA Confidential 1. (b) Set to erase the trailing edge (the image at the last of the trailing edge is not printed.3m 280m Lack 発生例 (3) Solution Increase the margin at the trailing edge The symptom tends to occur when the margin (blank area) at the trailing edge is narrow. [Service]→[System Setting]→[Software DIPSW]→DIPSW01-0:1 2. If the trailing edge of the paper flips and vibrates slightly and contact with the intermediate transfer belt.8m 80. margin at the lead edge becomes too small causing feed problem or image quality problem. Change the trailing edge erase amount.4mm (Intermediate transfer belt cycle: 861. the contacting part appears as white part on image.] . [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Printer Adjustment] →[Restart Timing Adjustment] Note Depending on the image. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment.58 - .) 1. 59 - . KONICA MINOLTA Confidential →[Rear Edge Erase Quantity]→ Recommendation +50 Table of contents . Increase the set value Develop AC Bias Fine Adj. the toner on the developing sleeve roller is consumed only at the solid corresponding part. 1.1. Image after white part becomes darker (Developing ghost) (1) Symptom When printing solid part and white part mixed image.) Feed direction Feed direction (2) Cause When printing partly solid image. (Red line indicated area). the toner supply does not catch up for the previous solid part. On the other hand. . 2. Decrease the set value of Covered margin fine Adj. perform auto gamma adjustment. the density difference is very noticeable.3. perform adjustment. the density of solid part at immediately after white area looks darker. Service mode→[Process adjustment]→[Process fine adjustment] →[Covered margin fine adj] After setting. for the white part. KONICA MINOLTA Confidential 1. Then when printing the next solid part. perform auto gamma adjustment. (3) Solution To increase developing ability. Service mode => [02 Process adjustment] => [04 Process fine adjustment] →[02 Develop AC Bias Fine Adj. Be sure to check actual print at every step. . (Blue line indicated area).60 - . (The same situation as printing white area. Consequently.] After setting. As the result. toner amount on the roller is sufficient and printed with correct density. Please adjust carefully. Note Adjustment may cause background or carrier attachment. This also occurs if printing the color not included in solid part. the second solid part is printed slightly lighter. KONICA MINOLTA Confidential 3.61 - . perform auto gamma adjustment. Increase the set value of Toner density fine adjustment Service mode →[Process adjustment]→[Process fine adjustment] →[Toner density fine adjustment] Table of contents . 4. Decrease the set value of Develop AC frequency Service mode→ [Process adjustment]→[Process fine adjustment] →[Develop AC frequency] After setting. (3) Solution 1. change to Line2 or Dot2. the background or rough image may occur.2. KONICA MINOLTA Confidential 1. Change [Line2]:[Type1] to [Type2]. 2. Darker at the trailing edge of image (1) Symptom The image density increases at the trailing edge of the paper to the paper feeding direction Feed direction (2) Cause Developing sleeve rotation direction and drum ration direction is opposite. [Dot2]:[Type1] to [Type2]. Change the Developing AC frequency If customer does not want to change screen. Table of contents .3. Change the screen. If Line1 or Dot1 is used. Service mode→[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Frequency Fine Adjustment] Note However. change the Developing AC frequency from Service mode. Still the image density difference is noticeable change the Custom screen setting: Utility menu→[Machine Admin. Setting] →[System Setting] →[Expert Adjustment ] → [Quality Adjustment]→[Custom screen]. when changing this setting.62 - . (2) Cause Though new developer is supplied. Background or toner scattering after continuous low coverage (1) Symptom Continuously printing high coverage (50% or more) after continuously printing low coverage (less than 3% and 10. cleaning failure may occur. • When the developer is deteriorated. When the band creation setting is enabled. the effect of the setting change may not appears.3.3. KONICA MINOLTA Confidential 1. too much low charged developer remains inside the developing unit. (3) Solution To consume low charged developer. In that case. Table of contents . toner may scatter from the developing unit or background may occur.000 prints or more).63 - . DipSW 0% 15% 3% 5% Toner band DipSW 44-5 = 0 DipSW 44-5 = 0 DipSW 44-5 = 1 DipSW 44-5 = 1 creation DipSW 44-6 = 0 DipSW 44-6 = 1 DipSW 44-6 = 0 DipSW 44-6 = 1 setting (Default) Color(YMC) 0% 2% 3% 5% Toner band DipSW 49-6 = 0 DipSW 49-6 = 1 DipSW 49-6 = 1 DipSW 49-6 = 1 creation DipSW 44-7 = 0 DipSW 49-7 = 0 DipSW 49-7 = 0 DipSW 49-7 = 1 setting (Default) BK Note • When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count. replace the blade of the intermediate transfer cleaning unit. BK 2% [Service mode]→[System Setting]→[Software DipSW setting] Change Dip-SW setting and create the toner band. KMI recommends to replace the developer together. (Toner band is not created by factory setting) Recommendation value: Color(Y/M/C) 3%. change the setting to constantly consume the developer by creating toner band. KONICA MINOLTA Confidential 1.3.4. How to maintain consistent color during continuous printing (1) Symptom Inconsistent color (2) Solution C1070 series have 3 correction items to adjust the color. Aim the stable color optimum for the target depending on the job size and machine usage by combining correction items and interval. 1. Priority on stability To enhance stability in density during continuous print, select Stability. When the Stability is selected, the distance between papers is enlarged at certain interval then the patch is created for the density control. • [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment] → [Stabilization Adj. Setting] • [Machine]→[Stabilization Adj.] From either of the above screen, change the setting from [Speed] to [Stability] - 64 - KONICA MINOLTA Confidential • Merit and demerit at selecting, “Stability” Merit Stable density during JOB Demerit Productivity decrease (95% for A4 size) If the density difference between images is too large, stabilization operation of about 30 sec, may be inserted in the middle of a job. 2. Automatic gamma adjustment Adjustment cycle : 1000 prints Adjustment duration: 80 to 120 seconds Note Even the adjustment cycle 1000 prints comes, the adjustment is performed only after 1minute interval between jobs. 3. Customize correction operation (change interval) Color calibration during a job Changing interval of the calibration operation will effective to balance between stability and speed depending on the job size and machine use state. The setting is selectable when the “Stability“ was selected. How to set [Utility]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→[Quality Adjustment]→[Stabilization Adj] Correction performing interval is roughly the following prints. Operation duration : Approx 1 sec (conduct during job) Frequency Max density correction -2 -1 Normal 1 2 200 prints 100 prints 50 prints 30 prints 10 prints Table of contents - 65 - KONICA MINOLTA Confidential 1.3.5. Small blank area or color registration error (1) Symptom Small blank area appears or color registration error is visible at the text or fine line part (2) Cause When using heavy paper (256g or more) or thick paper, the intermediate transfer belt rotation speed is changed when the paper passes the 2nd transfer unit. It causes the color registration error at the first transfer where the toner on the photoconductor drum is transferred to the intermediate transfer belt. The color registration error appearing 1st position depends on the distance between 2nd transfer roller and drum for each color. (See figure 1) From 495 mm of the 1st sheet and from the 2nd sheet, the color registration error of each color overlaps and appears for all colors. Leading edge 1 2 3 4 Yellow 115m 95m 95m 95m 95m 4 Feed direction Magent 20m 95m 3 Cyan 95m 2 Black Abnormal: Normal: 115m 1 Cyan color registration error No registration error Fig.1: Color registration error appearing position for A3 (297x420ｍｍ) (3) Solution It will be improved by the following: To reduce the intermediate transfer belt speed change, increase the line speed by following 1. From COPY or MACHINE screen, select [Paper Setting]. Select arbitrary tray. Then select [Change]. At the [Weight], select the lighter weight than actually used paper. (As the rough indication, 1/1 speed for 105gsm or less, 2/3 speed for 106 to 209 gsm) However, if the above setting change is performed, fusing time is reduced and fusing failure may occur. So, the setting should be used carefully. 2. If the fusing failure occurs after trying the above (1), change the fusing temperature by following procedure: From COPY or MACHINE screen, select [Paper Setting]. Select arbitrary tray. Then select [Change]. Select [Process Adj.] then press [Next] button. For the [Upper Roller Temperature (Print)] and [Lower Roller Temperature (Print)], enter larger value. However, if the fusing roller temperature is changed, paper turns wavy or blister on the coated paper may occur. Additionally, depending on the paper, the registration error cannot be solved completely. - 66 - KONICA MINOLTA Confidential If the improvement level is not enough. Table of contents .67 - . please request customer to try another paper type. KONICA MINOLTA Confidential 1.] is changed. to [OFF] [Paper Setting]→[Process Adjustment]→[Up Fusing Initial Temp]. (2) Cause Fusing temperature setting is higher for the paper. 69 and check image. 2. "fusing failure" (Toner is peeled off because fusing temperature is not enough) may occur.]→[Upper Fusing Roller Temperature] As the first step. (3) Solution 1. 3. print the test pattern 20 sheets of No. Change DipSW 1-0 from 0 (Default) to 1. set [OFF]. Reduce Upper fusing temperature Decrease Upper Fusing Roller Temperature for respective trays. Table of contents . Change Up Fusing Initial Temp. Caution When [Up fusing Initial Temp. [Machine]→ [Paper Setting]→ [Change Set]→ [Process Adj.6. Show Process adjustment in Paper Setting. change temperature by 10 °C then gradually decrease (Max 20 °C) To avoid fusing under. go to the next step. Too high gloss (1) Symptom Gloss is too high. If the effect is not enough after confirming the result.68 - .3. 1.7. Table of contents . Temperature of lower roller surface is too high. print 20 sheets of test pattern 69. When the effect is not enough.]→[Process Adjustment] 2. Be careful for the fusing under offset. Change by 5°C. [Administrator Setting]→[Common Setting]→[Fusing Stability] Change setting to [Better Quality] or [Best Quality] Note When changing the setting from Speed (default). 3.69 - . Maximum adjustment range is 15 °C same as lower roller. Be careful for the fusing under offset. Change by 5°C. (b) Temperature of lower roller surface is too high shortly after print starting. productivity may decrease. To check. KONICA MINOLTA Confidential 1. Maximum adjustment range is 15 °C. decrease upper fusing roller temperature. print 20 sheets of test pattern 69. Change DipSW1-0 from 0 (Default) to 1 to show process adjustment on paper settings. (2) Cause (a) When Mix mode or changing a tray. (b) Temperature of lower roller surface is too high shortly after print starting. To check. Temperature of lower roller surface is too high. (3) Solution (a) When Mix mode or changing a tray. Rough image on the 1st side of duplex (1) Symptom The image on the 1st side of duplex print gets rough and not glossy. to [Better Quality] or [Best Quality]. Change fusing stability setting in Administrator setting. It is noticeable when paper type is switched. Decrease fusing roller lower temperature for respective tray.3. [Machine]→[Paper Setting]→[Change Set. 8. The toner reversely charged is not transferred to the paper and looks like void (white spot). set the setting to auto and go to step 2 in below. without reset the setting. If the improvement level is not enough.3. • Color lines: Shock generated when the trailing edge exit the 2nd transfer front guide and blur due to abnormal discharge. [2nd transfer-Lead Edge (Back)].] [2nd Trans.70 - . to show process adjustment on paper settings.]→[Process Adj. Pressure] Select [Normal] When [Normal] is selected. KONICA MINOLTA Confidential 1. To show process adDipSW1-0 from 0 (Default) to 1.] → [Process Adj. poor 2nd transfer occurs. Adjust 2nd transfer current at the banding occurring part. Change DipSW1-0 from 0 (Default) to 1. [Machine]→[Paper Setting]→ [Change Set. Please adjust while .]: [2nd transfer-Lead Edge (Front)]. 2. When very stiff paper exits the 2nd transfer front guide. 2nd transfer-Rear Edge (Front)] or [2nd transfer-Lead Edge (Back)] If output is reduced too much. The belt and paper does not contact at that point causing abnormal discharge. 2. the paper hits the belt strongly and generates shock. color line in main scan direction (CD) may appear at 105mm from leading edge. (3) Solution (a) Change 2nd transfer pressure 1. If it is noticeable. white or color banding appears at 5 to 10mm from leading edge and 20mm from trailing edge. White or color banding at thick paper leading and trailing edges (1) Symptom On thick paper. go to the step 2. the paper pushes up the intermediate transfer belt when the leading edge or trailing edge of the paper enters to the 2nd transfer nip. Feed direction 10mm from leading edge 20mm from trailing edge (2) Cause • White band: Void due to abnormal discharge When very stiff paper is fed. 2nd transfer output adjustment. [Machine]→[Paper Setting]→[Change Set. The shock makes the image on the belt blurred. (b) 2nd transfer output adjustment 1. long grain for A3 paper. Adjust the leading edge and trailing edge erase amount. (c) Change paper face (turn around the paper in the tray) (d) Change paper grain direction The symptom is improved when the paper grain is vertical to the feed direction. [Machine] → [Paper Setting] → [Change Set. Table of contents . to show process adjustment on paper settings. 2.71 - . Note Carefully set the erase area because the image in the erased area is not printed.] Lead edge erase quantity and Rear edge erase quantity. Change DipSW1-0 from 0 (Default) to 1. (For example.] → [Process Adj. KONICA MINOLTA Confidential checking actual print image.) (e) Leading edge and trailing edge erase 1. (3) Solution (a) Turn OFF the sub-switch then the main-switch of machine. (f) Push back the process mount then fix the internal cover with the screw. C-2451. (2) Cause The orange tape is still attached to toner supply inlet of the respective unit. conduct [Toner Density Revert] for the applicable color for 4 to 5 times. [Service]→[Process Adjustment]→[Drum Peculiarity Adj. (d) Clean inside the machine when it gets soiled. Gently pull out the process mount. Be careful not to spill the toner. C-2452. C-2452. (c) Remove the developing unit from the process mount and remove the orange tape. Close the front door. KONICA MINOLTA Confidential 1. C-2453 or C-2454 (toner density abnormal) occurs.]→[Toner Density Revert] (h) Conduct [Gamma Automatic Adjustment] [Service]→[Process Adjustment]→[Drum Peculiarity Adj. Orange tape Table of contents . Select the applicable color then press [Start]. C-2453 or C-2454. (e) Reinstall the developing unit to the process mount.3. (g) From the service mode.9. Low toner density (1) Symptom Just after developing unit replacement. C-2451. Repeat 4 to 5 times.]→[Gamma Automatic Adjustment] (i) Measure the density and confirm that no problem occurs.72 - . (b) Open the front door and remove the internal cover. builds up on the 2nd transfer pressing part and the pressed status becomes improper. If the symptom does not improve. Paper feed direction (2) Cause The dust from 2nd transfer roller shaft due to wearing.10. . Poor transfer at image front (1) Symptom When the periodic cleaning of the 2nd transfer unit is not enough. (3) Solution Clean the pressure sliding part (4 position) and surrounding area (See the figure in below) with the alcohol and the hydro wipe. KONICA MINOLTA Confidential 1. color is fainted.73 - . Front side image gets lighter. poor transfer may occur at the entire area of the machine front side image. replace the pressing cover (A50U5209) at machine front side with new one.3. 74 - . KONICA MINOLTA Confidential Front Rear A50U5209 Pressing cover Pressure sliding part Surrunding area Table of contents . KONICA MINOLTA Confidential 1. Note When the cleaning frequency is increased.75 - . (3) Solution Change DipSW20-06 and increase frequency of the cleaning [Service] → [System Setting] → [Software DIPSW Setting] DipSW20-06=0 (Default) = 1 x 1. =2x2 When the usual CL frequency is 4 times it is changed to 8 times. the productivity decreases by 1% to 2 %. and the 2nd transfer roller consuming state and paper type (additive of paper).3. change the setting and see the customer's acceptance. cleaning performance is not enough. Prevention of the backside soilage (1) Symptom The backside of the paper gets soiled (includes 75mm cycle. Table of contents .11. the 1st one is at less than 75mm) (2) Cause The patch created between images in image stability priority mode attaches to the 2nd transfer roller.5 When the usual CL frequency is 4 times. depending on the environment (especially at low humidity environment). Though the 2nd transfer roller's cleaning operation which is to return the toner to the intermediate transfer belt using the static electricity is inserted. it is changed to 6 times. Therefore. (2) Cause The symptom which occurs due to the reverse rotation direction between developing roller and drum rotation direction is in counter. Note Check the image at the adjustment to check the effect.12. darker at edge (1) Symptom On halftone image. Table of contents . However. when the problem area is l like trailing edge of the patch. 2. The more the larger value is selected. It is effective to prevent fainting at the leading edge. It is effective not only for the text but also for the graphic. the darker the line becomes. When the value is changed from 0 (default) to lower value. KONICA MINOLTA Confidential 1. When the value is changed from 0 (default) to larger.3. this adjustment is not effective enough. [User Setting] → [Printer Setting] → [Outline Process] 1. Copy image is out of adjustment target. Fainted outline. (3) Solution Adjust the outline process. the outline of the paper leading edge side gets fainted (fainted outline) and the trailing edge side outline gets darker. FD Rear Edge Density Adjustment Adjust to – direction. the outline at lead edge is written darker. Darker edge of the text is improved. FD Lead Edge Density Adjustment Adjust to + direction. It is effective for the print image. the ouotline at the trailing edge is written ligther.76 - . image background occurs. High coverage > Low coverage. Table of contents . conduct the Gamma Automatic Adjustment.] Increase setting from 0 to +5 Note After changing the setting.77 - . When this setting is enabled. charging corona. developer. [Paper Setting]→[Change Set]→[Process Adjustment]→[Thick Bk mode] Change from OFF to ON. the grain of the lubricant on the photo conductor drum becomes larger (invisible for human eyes) The potential is low at the lubricant grain part and the toner is developed there. (For the rough indication. Note "Thick Bk mode” is the setting to print Bk in color mode. When the lubricant grain increases. once in 100 prints. By changing the setting. Bk mode/High coverage (25% and over) (2) Cause When the printing is continued under high temperature. even for the single Bk print. When “Toner band creation (DipSW)" is enabled. since all the color toner is spent. we recommend to use the "Thick Bk mode" only when it is necessary. drum. The number of lubricant grains becomes larger in Bk mode > Color mode. Since toner scattering possibly occur. image background and scattering toner can be reduced to some extent.) However. toner band creation by 3% is recommended if the 3000 pages and over is printed using Thick Bk mode. the non-used color is consumed.] Develop AC bias [Service Mode]→[Process Adjustment]→[Process Fine Adjustment]→[Develop AC Bias Fine Adj.] Change the setting from 0 →-5. (3) Solution (a) Change the value of the Background Margin Fine Adjustment. (b) Change the setting for the Develop AC Bias Fine Adj. (c) When the image background appears at black and white mode. Develop AC Frequency [Service Mode]→[Process Adjustment]→[Process Fine Adjustment]] Increase from 0 to +5 Note After changing the setting. change the "Develop AC Bias Fine Adjustment" value slightly back for the adjustment. conduct Gamma Automatic Adjustment.3. distance between sheets is enlarged and productivity reduces to 90% or less. the unevenness in density in developing cycle may occur. When changing the setting. KONICA MINOLTA Confidential 1. Also. 1st transfer roller for Y. developing unit. the image background becomes visible on coated paper. The symptom particularly occurs when the temperature is 25 ºC and over. Image bacground under high temperature (1) Symptom During continuous print on coated paper under high temperature environment. please note that carrier attachment may occur. [Service]→[Process Adjustment]→[Process Fine Adjustment]→[Background Margin Fine Adj. too. M and C consumes. use the "Thick Bk mode".13. In that case. 14 Backside image soilage (1) Symptom At duplex print. Dust drops . KONICA MINOLTA Confidential 1.3. (2) Cause When the oil from sintered shaft bearing and paper dust or other dust is mixed. it may drop on the bottom plate and attach to the paper when the paper goes through the bottom plate during the switch back. the 2nd side may get soiled at machine front and rear.78 - . 79 - . Table of contents . KONICA MINOLTA Confidential ] Dusts Bottom plates (3) Solution Clean the above points and ADU. 15. the toner cleaning failure occurs at the edge of the intermediate transfer belt. Toner pass through the edge of the blade Cushion material Blade (2) Cause As shown in the figure below. the blade gets over the cushion material and the edge of the blade flips. KONICA MINOLTA Confidential 1.80 - . Press . Flipping (3) Solution 1. Toner is not cleaned at the edge of the transfer belt (1) Symptom During machine setup. release => press => release => press repeatedly.3. Repeat. 81 - . Table of contents . Note Be careful not to remove the cushion material. KONICA MINOLTA Confidential Space is created between belt and blade Release 2. → Press the cushion material to the arrowed direction to change form. Press the cushion material to prevent interference. 3. 1.82 - . toner density of concave parts gets thin because toner cannot transfer on concave parts.3. (3) Solution Select one of following 2 cases according to customer usage. Note: When the machine has stopped for 3 days or more. (2) Cause ・Lack of electric field at concave parts Electric current of 2nd transfer is likely to flow to concave parts. conduct 3 times regardless of the following conditions. Transfer belt M toner Ctoner Paper surface Major embossed paper  Japan Leathrc (Tokushu Tokai Paper)  US Linen Papers (Neenah Paper)  EU Elfenbeinkarton (Igepa)/ i-Tone Camric Linen Platinum White (Mohawk) Note If it is difficult to identify paper type. conduct less than 3 times. Image density is lighter on unsmooth paper (rough paper)]. and step 3 through 8. Transferability on embossed paper (1) Symptom In using embossed paper (bumpy paper). and less than 5%: Twice  5% or more None  Life of Transfer cleaning blade 50% or more Twice . ・Lack of fusing ability at concave parts Fusing ability becomes insufficient because of pressure and heat quantity for toner at concave parts. [Utility/Counter]→[Administrator Setting]→System Setting]→[Expert Adjustment]→ [Execute Adjust Operation ]→[Toner Refresh Mode]→[Cancel]→[Exit[UTULITY]] Number of times of Toner refresh: Three times If following condition(s) are applicable. Go to step 2. Go to step 1.16. Coverage (Last 5000 prints)  3% or more. and step 3 through 8. and transfer becomes poor. Execute toner refresh mode. Case 2: Customer regularly prints rough/emboss paper. KONICA MINOLTA Confidential 1. Case 1: Customer rarely print unsmooth/embossed paper or print volume of those is low.17. ・Extra electric field at concave parts Transfer failure at concave parts occurs as discharge occurs through void part. confirm [1. change the DIPSW for 2nd transfer unit pressure release setting. DIPSW59-7 : 1 (Default: 0) 3. However. Adjust. Color(Y/M/C) 3% setting DIPSW44-5 : 1 (Default: 0) DIPSW44-6 : 1 (Default: 0) BK 2% setting DIPSW49-6 : 1 (Default: 0) DIPSW49-7 : 0 (Default: 0) Side effect: Toner band creation setting reduces the productivity (Reduce by max 10% for A4 conversion) when the coverage is 3% Color. 2ndTrans. If the immediate improvement is necessary. If customer does not care the color change. execute below. 4. Pressure]→[Normal] Side effect: Color registration and shock noise may get worse. conduct this one before step A. replace the developing unit (developer). the cleaning failure may occur. By using toner band creation function. transfer ability for embossed paper becomes poorer as the toner inside the developing unit gets deteriorated. KONICA MINOLTA Confidential 2. Pressure (177gsm and more) [Paper Setting]→[Process Adjustment]→[2ndTrans. Replace transfer belt with new type high. Per Tray(YMC) ]/[Dens. the toner is regularly ejected from the developing unit. Adjust. Note When the low coverage job was printed just before enabling the toner band creation. color may change. the effect does not appear immediately because all the deteriorated toner is not ejected at once. When the intermediate transfer CL blade count reaches more than half. Execute toner band creation function (Color 3%.resistance (A50U5105) (It will be available from July 2015).BK 2%) job continuously. . and fresh toner is supplied. When the less than Color 3%. When printing low coverage (less than Color 3%. printing temporary stops and toner band is created on the intermediate transfer belt to keep minimum coverage becomes Color 3%. BK 2% coverage is printed continuously. BK 2% or more coverage job is printed. Note If fusing failure occurs by changing toner attaching amount. Therefore. Per Tray (K) ]→[+2] Side effect: Fusing failure and line like ripple may occur. 5. BK 2% and increases toner consumption at low coverage printing. When the Color 3%. To prevent 2nd transfer roller getting toner dirt from toner band. print 1000 prints of 20% coverage original for all colors (Y/M/C/K). BK 2%. By changing the toner attaching amount. Density adjustment by increasing toner attaching amount [Paper Setting]→[Process Adjustment]→[Dens.83 - . the transfer ability become stable.BK 2%). it is effective to increase the density. (Front) or (Back)]. [Paper Setting]→[Process Adjustment]]→[Upper Fusing Roller Temperature]→[+10] If the effect is not sufficient. productivity decreases. Decrease Electric current of 2nd transfer [Paper Setting]→[Process Adjustment]→[2nd transfer output Adj. to [Better Quality] or [Best Quality]. For the embossed paper. [Paper Setting]→[Process Adjustment]→[2nd transfer-rear edge(Front) or (Back)]→ Input to [-20] If toner density of trailing edge still lighter. input to [-25] (change per 5step). KONICA MINOLTA Confidential 6. Table of contents . Please increase the temperature and check the result. increase fusing roller temperature. Note If solid image gets lighter. increase of the fusing roller temperature is effective. (change per 10-step) [2nd transfer-rear edge (Front) or (Back)] might not change.(Front) or (Back)]→Input to [+50] Side effect: Density looks lighter at multi-color solid part as poor 2nd transfer may occur. input to [+40] in [2nd transfer output Adj.84 - . 8. Lower Speed setting (If the effct of [Upper Fusing Roller Temprature] is not sufficient. Increase Upper Fusing Roller Temprature If poor fusing occurs.) [Paper Setting]→[Weigh]→[Speed Setting]→[Middle or Low] Weight: 176gsm and less → Select [Middle] Weight : 177gsm ∼ 256gsm → Select [Low] When changing the setting from [Speed] which is the default. change to [+20]. 7. Note: When the poor 2nd transfer occur at only at trailing edge Increase output of 2nd transfer-Rear edge It is necessary to increase output of 2nd transfer-rear edge to perform offset of rear edge. Side effect: There are the case that solid image gets thin. " "Upper fusing temperature" and "Paper setting" of the unsmooth paper setting. The solution depends on the paper type but it is difficult to identify by just looking the printed image. which appears as unevenness. Image density is lighter on uncoated paper (unsmooth paper) (1) Symptom Image density gets lighter on unsmooth paper.3.85 - . the used paper is categorized as embossed paper. Uncoated Non-melting toner is not absorbed to paper's fiber and some are crushed leaving its shape. Next. Reset to default setting from "Up Fusing Initial Temp. Symptom tends to occur especially when the paper surface is rough. Uncoated Melting toner is absorbed to paper's fiber and white background remains. perform for the emboss paper solution may be the quickest way to solve the issue Major unsmooth paper (surface rough paper)  US Spring Hill Digital /Finch Color Copy  EU Fastprint /HVO Note When the solution for the unsmooth paper is not effective. (2) Cause High gloss toner gets absorbed on unsmooth paper then image density looks lighter. Some of uncoated paper is categorized as unsmooth paper and some are categorized as embossed paper. . ・Uncoated paper Low gloss toner (C6501) This is a small scattering reflection and appears even as a whole.17. ・Coated paper High gloss toner (C1070) Before melting After melting Coated Melting toner is not absorbed to paper's fiber and white background does not remain. At first trying some changes of key parameters for the rough paper solution. ・Uncoated paper High gloss toner (C1100) Light makes regular reflection on toner's surface and changes its angle on paper's rough surface. KONICA MINOLTA Confidential 1. Change Up Fusing Initial Temp. 3. the used paper is categorized as embossed paper. Per Tray(K) ]→[+2]  Side effect: Fusing failure and line like ripple may occur.Transferability on embossed paper".  Default fusing temperature is different according to the paper type selected by the paper setting. go to the next step. Therefore. Note When the temperature is reduced too much. Print test pattern No. 53 (1 sheet) in order to check if "fusing failure" symptom occurs. Adj. Note When [Up fusing Initial Temp. Press [Service Mode]→[Test Mode]→[Test Pattern Output Mode] Enter the following value [Test Pattern] : 53 [Gradation-Y] : 0 [Gradation-M] : 255 [Gradation-C] : 0 [Gradation-K] : 255 Press [Print Mode] then print on customer's paper. when changing the fusing temperature.] is changed. execute below. If the effect is not enough after confirming the result. Adjust.3. The temperature for the plain paper is higher than that for fine/color specific. fusing failure (such as poor fusing or toner is peeled off because fusing temperature is not enough) may occur. Then go to "1. Reset to default setting from " Up Fusing Initial Temp.  When the rough paper solution is not effective. mind the paper type selected. "fusing failure" (Toner is peeled off because fusing temperature is not enough) may occur. Increase toner attaching amount (Density adjustment for each color) [Paper Setting]→[Process Adjustment]→[Dens. Table of contents . KONICA MINOLTA Confidential (3) Solution 1.16. 2. Per Tray(YMC) ] / [Dens.86 - . to [OFF] [Paper Setting]→[Process Adjustment]→[Up Fusing Initial Temp]. " " Upper fusing temperature" and "Paper setting" of the rough paper setting. set [OFF]. Note  If fusing failure occur by density adjustment. Reduce Upper fusing temperature [Paper Setting]→[Process Adjustment]→[Upper Fusing temperature]→Input -5(change per 5 step) When the improvement level is not enough. go to the next step. 3. increase [Lower Fusing Roller Temperature] or use the curl correction of the main body/RU. • When the temperature is increased too much. the gloss memory is easily find. Gloss memory (1) Symptom The gloss is partly different. Change fusing temperature by every 5ºC and see the result. • Middle temperature Depending on the wax amount difference in the gloss history. (Gloss is higher where the toner was at the previous cycle). change the DIPSW1-0 (To show process adjustment in the Paper Setting) from "0" to "1" (Show) 2.]→ • [Upper Fusing Roller Temperature] Note When the process adjustment is not indicated. large paper curl may occur depending on the paper type and ambient environment. the gloss level is entirely low and the gloss memory is not easily see. • High temperature The wax amount difference at gloss history is big but entire gloss level is high and the gloss memory is not easily seen. [Paper Setting]→[Change Set]→[Process Adj.87 - . Table of contents . Note • When the temperature is decreased too much. KONICA MINOLTA Confidential 1. ABCDEFGHIJ ABCDEFGHIJ Repeated gloss mark (text/image) ABCDEFGHIJKL ABCDEFGHIJKL (3) Solution 1. change the temperature by5 ºC within the range ±20 ºC to seek the temperature symptom is the least visible. If the step 1 does not improve enough. In this case. (2) Cause Due to the effect of the wax component which was transferred to the fusing upper belt. ABCDEFGHIJKL ABCDEFGHIJKL Wax component ABCDEFGHIJKL ABCDEFGHIJKL 311mm cycle attaches to the fusing upper belt. the difference of the gloss corresponding to the image appears at fusing upper belt cycle (approx 311mm ) (Gloss memory). fusing under offset may occur. It corresponds with the image patern. [Paper Setting]→[Change Set]→[Process Adj.18.]→[Lower Fusing Roller Temperature] Main body [Paper Setting]→[Change Set]→[Process Adj]→[Curl Adjustment] RU [Curl Adjustment] Tips • Low temperature Regardless of the previous image. KONICA MINOLTA Confidential 1. Color registration ability may become poorer and torque abnormality may possibly occur. (2) Cause The toner image aggregates at the 2nd transfer unit and only the edge part is transferred well and the center part is not transferred to the text. Set the 2nd transfer pressure to [Low] from the process adjustment of the tray setting. Adjust while checking the image.88 - .6% 1 1 +0. the thin line gets broken at the middle. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. It tends to occur especially on OHP sheet. (3) Solution (a) For the 176gsm or less weight paper.9% Note Print accuracy or transfer ability may get poorer. DipSW 41-03/04 03 04 Drum speed gap adjustment (Drum speed against the transfer belt) 0 0 +0% (Default) 1 0 +0. set the lower pressure for the process setting of the tray setting. [Service] mode→[System Setting]→[Software DIPSW Setting] Set [Paper Setting]→[Change Set]→[Process Adj.]→[2ndTransPressure]→[Low] (b) Change the belt speed difference between drum – Intermediate transfer belt.19.3% 0 1 +0. Table of contents .3. Center of line gets broken (1) Symptom When the very smooth surface paper is used. the edge gets blurred and the text looks blurred.20 Secondary color text scatters (1) Symptom Red. On the printer driver setting.3. the toner may scatters around the text. When the ambient environment is low temperature and low humidity. when the background color is white. (2) Cause For the dark red. we recommend [Text /Graphics] . on [Outline Process] For the Object. blue and green texts and so on are the secondary color and the toner attaching amount reaches near 200% which is too much. KONICA MINOLTA Confidential 1. Specifically. enable the text color text blur prevention (a) IC-602 Access [Imaging] check [Color Text Blur Prevention]. if the blur appears for the text and thin line only. blue and green texts look like blurred. Therefore.89 - . select [Text/Graphics] or [Text/Graphics/Image] Object is commonly applied to other outline processing. (3) Solution 1. the side effect may gets worsen. screen pattern is recognized easily. green and shadow is improved. Note When the Color text blur prevention is enabled. Be sure to conduct adjustment while checking the image.90 - . the blur at dark red. When the 0 is not enough. select [Text/graphics]. the chroma is slightly lowered or when the image is checked with magnification. blue. Table of contents . Set the Color text blur prevention effect level When the function is enabled. 2. KONICA MINOLTA Confidential (b) IC-308/IC-415 Access [Image] tab. comparing with the disabled. On the other hand. and check [Color text blur prevention] at [Edge enhancement] At the Apply enchantments to. try the setting 1 DIPSW Setting to set effect level DipSW 0 1 2-3 (Image area) Default correction Stronger correction 2-4 (Text/Graphic area) Default correction Stronger correction Note When the setting is enabled. the effect level is selectable by 2-steps. 15 of Troubleshooting Guide) The parameter which have big influence on offset is as follows. Therefore. the anchor . Therefore the symptom occurs in the cycle of fusing belt.21. • Grounding for fusing heat roller <(a)/(d)/(e)> • Separation current <(a)/(d)/(e)> • Fusing belt temperature <(a)/(b)/(c)(d)/(e)> • (Moisture in the paper) • (Paper properties) Paper feed direction A B C D 311mm A B C D (2) Cause (a) Static electricity offset When the paper behavior after passing 2nd transfer (the distance from the separation pole) changes. It lowers the electrostatic absorption power between toner and paper. the toner on the fusing belt attaches to the image at next belt cycle. (311 mm interval) (a) Static electricity offset (b) High temperature offset (c) Low temperature offset (d) Noise given by the electrostatic (Refer to 1. Consequently the toner re-transferred to the fusing belt.2. it is difficult to identify the cause from the image.91 - . (b) High temperature offeset Excessive heat supply to the toner at the nipping part causes the decrease of the toner stickiness then toner is pulled by paper and belt then remains on the fusing belt. the charge given to the toner changes accordingly. KONICA MINOLTA Confidential 1. Under this condition. For all the cases.3. Image offset caused by fusing unit (1) Symptom Different types of offset exists and in many cases. trying some change of key parameter for the issue may be the quickest way to solve the issue rather than identify the cause. (c) Low temperature offset Lower heat supply to the toner at fusing nipping part.17 of Troubleshooting Guide) (e) Noise at trailing edge (Refer to 1. The image is affected by the electric field when it enters to the fusing nip.2. the electrostatic absorption power between paper and toner is reduced. See the photo below. (Color lines if toner is scattered or white line if toner is separated) (3) Solution 1. it gets effect of the electric field and scatters the image. Check the fusing heat roller ground Check the conduction between fusing heat roller and fusing unit frame using the tester. KONICA MINOLTA Confidential effect is not generated between the paper fiber and the toner. the toner is separated from the paper and attaches to the fusing belt. This potential remains on the fusing belt and affects the next image. When the image enters to the fusing nip. (e) Trailing edge noise Paper charging amount at the trailing edge is high on of the thick paper. causing darker density. Consequently.92 - . There should be electricity conduction (less than several hundreds Ω) 115mm Should contact with tip (side) of roller's core metal . (d) Static electricity noise When the paper is discharged too much. Red circled part • Check the contact status of the spring material. KONICA MINOLTA Confidential When the conduction is not seen. Blue circled part When the plate spring gets deformed.93 - . Clean with the drum cleaner. . correct it. • Clean the following part with the drum cleaner. If it is not enough. Clean with the drum cleaner. increase the pressure. check the below procedure. KONICA MINOLTA Confidential Caution If there is a gap between the joint of neutralization ring and fusing roller as NG picture. Bring the joint of neutralization ring into contact with claw of the spring. Filing the joint of neutralization ring. 2. and claw of the spring breaks. In the case of non-electricity conduction. and remove the burr. NG OK Breakage of the spring Claw of spring Solution 1. when replacing fusing belt. The burr is likely to shave the claw of spring. edge of neutralization ring shave the spring. In addition.94 - . . note in below assembly. Do not increase too much. Wrinkle. separation ability gets poorer Static electricity noise occurs When the symptom is not improved by increasing the separation current. Increase Upper Fusing Roller Temperature Note When the upper fusing roller temperature is increased. the cause is not Noise given by the electrostatic. following symptom may occur depending on the paper type. [Separation AC(Front) or (Back) ] decrease of the setting may be effective to improve the symptom. Therefore do not decrease too much. 3. Static electricity offset 1. Access [Machine]→[Paper Setting]→[Change Set]→[Process Adj] And adjust separation current Increase [Separation DC (Front)] Note When the Separation DC is increased. the paper behavior may become unstable. Note When the separation current is decreased for the thin paper. Increase [Separation AC (Front)] [Machine]→[Paper Setting]→[Change Set]→[Process Adj] Depending on paper. Side effect: Fusing under 5. Fusing under Adjust fusing belt temperature by changing Upper Fusing Roller Temperature Access [Machine]→[Paper Setting]→[Change Set]→[Process Adj] Adjust Upper Fusing Roller Temperature. Change the DipSW 1-0 (To show process adjustment) 0 (Default) to 1. When the cause is the high fusing temperature offset. Decrease [Separation DC (Front)] [Machine]→[Paper Setting]→[Change Set]→[Process Adj] 2. the decrease of the temperature is very effective. do not to increase too much. Therefore. or thin paper transfer feed failure occur. Noise given by the electrostatic 1. 4. corner folding/JAM/transfer repelling at lead edge and . • Plain paper Static electricity noise • Coated paper Unstable behavior Wrinkle occurs. following symptom may occur.] →[Upper Fusing Roller Temperature]: Decrease the temperature Though the effect is not much decrease of the fusing temperature may improve the static electricity offset/noise by the static electricity. try to decrease the setting value. 2. • Fusing wrapping JAM • Too much paper curl after printing • When printing the 2nd page.95 - . High temperature offset Decrease fusing temperature [Machine]→[Paper Setting]→[Change Set]→[Process Adj. When the increase of the setting value is not effective. KONICA MINOLTA Confidential 2. near the power supply cable.96 - .ROM : 00C1-18 and later DIPSW 41-7 : 1 (default 0) Change the range of 2nd Transfer Output from +/-50 to +/. Check the paper status • Use just unpacked paper (when the paper moisture is low. then increase the value per +10 until the symptom is improved. KONICA MINOLTA Confidential trailing edge because that the paper curl on the 1st page is large 6.]→ [2nd Transfer Output Adj. • The SW is located on the main body. Shift the value to plus direction. There is no side effect. Note Under the high humidity environment. to increase the value of 2nd Transfer Output Adj. if the heater is set to OFF. turn OFF. Adjustment of 2nd transfer output Press [Machine]→ [Paper Setting]→[Change Set]→[Process Adj.120. it causes extremely light image density problem due to automatic correction of 2nd transfer output under low temperature and low humidity. Table of contents . install the following ROM and change the DIPSW. (Front) may improve the symptom. the symptom tends to occur) • If the Dehumidifier SW is set to ON. DIPSW27-5: 1 (default 0) When the value of 2nd transfer output has set about more than +100. When using envelope fusing unit (EF-103) When the offset of K color occurs under envelop mode. lighter image or wrinkle may occur. 7. As requirement of this function. symptom tends to occur. Check the paper surface condition When the surface of the paper is not smooth.(Front)]→[+50]. the automatic correction of 2nd transfer output is limited partially under low temperature and low humidity. To prevent that. Suggest customer to tray another paper type as needed 8. C. white line). Toner scattering.22. FD lines (Cleaning failure) FD lines (White lines) . Background. color change. poor transfer and so on.3. Toner band control setting (1) Symptom Image failure like following occurs: FD line (cleaning failure. KONICA MINOLTA Confidential 1.97 - . And print low coverage and high coverage alternatively. And cleaning failure.98 - . The soilage on the 2nd transfer roller may transfer to the 2nd side of the paper and appears on the image. Toner Refresh Mode is automatically executed. Execute Toner Refresh Mode [Administrator Settin]→[System Setting]→[Expert Adjustment]→[Execute Adjust Operation]→[Toner Refresh Mode]→[back to regular display] After returning the regular display. It improves condition inside developing unit. developer may get deteriorated or lubricant may be provided too much to the transfer cleaning blade. and is effective to be keep stable density. And when print alternately low coverage and high coverage. FD line and background may be reduced. the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. The toner band provides toner to the transfer belt cleaning the lubricant on it. [Service]→[System Setting]→[Software DIPSW Setting] . 1. release the 2nd transfer pressure. which is a known function to prevent too much lubricant. Change toner band creation interval. when the band control is enabled. This may cause soilage on the 2nd transfer roller. KONICA MINOLTA Confidential Background (Enlarged view) Blank space Poor transfer (Embossed paper and so on) (2) Cause During long-run low coverage print. To prevent it. The new DU applies especially much lubricant at the beginning and too much foreign material is caught by the lubricant. 1. Turn the DIPSW for the band. too much toner scatters causing image background and contamination inside machine. (3) Solution Enable toner band control. When the toner band control is enabled.  When the band is enabled.99 - . In that case. DIPSW59-7:1 Table of contents . when the band is enabled.  When the developer is deteriorated. cleaning failure may occur due to too much waste toner in the intermediate transfer cleaning unit. The soilage on the 2nd transfer roller may transfer to the 2nd side of the paper and appears on the image. BK 2% DipSW 0% 15% 3% 5% Toner band DipSW 44-5 = 0 DipSW 44-5 = 0 DipSW 44-5 = 1 DipSW 44-5 = 1 creation DipSW 44-6 = 0 DipSW 44-6 = 1 DipSW 44-6 = 0 DipSW 44-6 = 1 setting (Default) Color(YMC) 0% 2% 3% 5% Toner band DipSW 49-6 = 0 DipSW 49-6 = 1 DipSW 49-6 = 1 DipSW 49-6 = 1 creation DipSW 44-7 = 0 DipSW 49-7 = 0 DipSW 49-7 = 0 DipSW 49-7 = 1 setting (Default) BK Note  When the band creation control is set to 5% coverage. When the band creation setting is enabled. This may cause soilage on the 2nd transfer roller. KMI recommends to replace the developer together. replace the blade of the intermediate transfer cleaning unit. To prevent it. the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. release the 2nd transfer pressure. the effect of the setting change may not appears. KONICA MINOLTA Confidential Recommendation value: Color(Y/M/C) 3%. cleaning failure may occur.  When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count. use the paper fresh from opening the package (containing less moisture). 20°C). (Go to Solution(c)) (3) Solution (a) Caused by paper shrinkage rate Change DipSW1-0 from 0 (Default) to 1. gradually decrease (by Max.1. Table of contents . and check no fusing under offset occurs. (c) Paper type caused If the paper waving still occurs after decreasing fusing temperature and using paper fresh from opening the package.1. the influence of the paper fiber is very big in some cases. (Go to Solution(b) ) (c) Paper type Depending on paper type. (b) Moisture content caused To correct it. Paper waving (1) Symptom The edge of the paper becomes wavy. If not enough. ( Go to Solution(a) ) (b) Moisture content When very moisture paper is used the amount of moisture which vapors during fusing differ between center and edge of the paper and the symptom specifically noticeable. propose customer to try another paper type.100 - . (2) Cause (a) Paper shrinkage rate The paper shrinks rate at the fusing unit is different between the center and edges of the paper. KONICA MINOLTA Confidential 2. [Machine]→[Paper Setting]→[Change Set]→[Process Adjustment] Rough target for the adjustment is by 10°C. 69. Decrease fusing upper roller temperature for respective tray setting. Print approx 20 sheets of test pattern No. to display process adjustment in paper setting. the sheet gets loosened and the registration sensor mis-detects.0mm].5mm] and see the result. [Machine]→[Paper Setting]→[Change Set]→[Both Sides Adj. Change DipSW1-0 from 0 (Default) to 1. (2) Cause (a) Off-centering by 5mm Since OHP is transparent. Setting for OHP sheet printing f (1) Symptom When printing OHP. J-3101 or fusing wrapping jam occurs. centering sensor mis-detects the sheet position.1. Table of contents . wrapping jam tends to occur due to the relation with the fusing temperature setting. off-centering by 5mm.]→[Registration Loop]. (c) Fusing wrapping jam Change Paper type to [Fine] or [Color Specific] [Machine]→[Paper Setting]→[Change Set]→[Paper Type] Note: After finishing OHP printing.]→[Mis-centering Detection]→[Not Detect] (b) J-3101 Change registration loop amount to prevent the sheet gets too loosened. (3) Solution (a) Off-centering by 5mm Disable centering sensor. return the set to the original value. Consequently.2. (b) J-3101 While forming registration loop.101 - . (c) Fusing wrapping jam When the plain paper is set for paper type.0mm] setting does not improve enough. [Machine]→[Paper Setting]→[Change Set]→[Process Adj. KONICA MINOLTA Confidential 2. If the [-5. change the setting by every [-0. Set the registration loop amount to [-5. to display process adjustment in paper setting. the registration roller moves the maximum distance (5mm). the paper enters to the fusing unit unstably. Adjust fusing temeprature Reduce fusing upper roller temperature to reduce curl after print Machine →[Paper Setting]→[Change Set]→[Process Adj. Adjustment Crosswise Dir. Adjustment. the trailing edge skews also on side 1. Depending on the environment. 2. Note When the fusing upper roller temperature is reduced too much. Change newly unpacked paper (low moisture content). suggest customer to use another type of paper. Change paper type After taking the abobe stpes 2 and 3 and the symptom is not improved. Table of contents . if the paper in the tray curls. maximum by 20°C. check that the Side1 image position adjustment is done properly. 1. Adjustment items: alignment of registration and fusing (mechanical adjustment). 3. 4. fusing roller turns the paper position.102 - . Then. So check the curl level and conduct adjustment [Auto] → [+1].3.1. humidity). (2) Cause When the paper curl level is different between the lead edge and the trailing edge. CD-Mag. KONICA MINOLTA Confidential 2. fusing under offset or repelling may occur. (3) Solution Before taking the following action.69 to check the fusing ability. Print 20 sheets of the test pattern No. Trailing edge skews (1) Symptom Trailing edge skew occurs on the side2 of the duplex printing. coverage. CD-Mag. when the trailing edge passes the registration. Change decurler setting for each tray Machine → [Paper Setting]→[Change Set]→[Process Adj. [+2].]→[Upper Fusing Roller Temperature] The rough target is to decrease by 10°C and reduce gradually.]→[Output Curl (Back on Top)] Note Curl level changes depending on paper/environment (temperature. Skew Adj. (3) Solution (a) Decurl level adjustment Request user to adjust the decurl level from the Paper Setting on operation panel. Machine → [Paper Setting]→ select a Tray →[Change Set]→[Process Adj. [Machine]→[Paper Setting]→Select a Tray→ [Change Set]→[Process Adj.]→[Upper Fusing Roller Temperature] The rough target is decrease by 10°C decrease. it is impossible to cover all conditions by the automatic control. KONICA MINOLTA Confidential 2. ML. However. (b) Fusing temperature adjustment Depress paper curl by reducing upper fusing roller temperature.4. fusing under offset/toner repelling may occur. Note Adjustment direction judged from output curl adjustment and output curl (back on top) adjustment is as shown in the following table. because the paper exit curl changes depending on the coverage/ambient environment/paper brand.1. [0]. Note When the temperature is decreased too much.103 - . (Maximum for the adjustment is 20 °C decrease). select a setting (Selection: [Auto]. * Curl direction is defined by the paper ejected state from main body. So.]→[Output Curl Adjustment]/[Output Curl (Back on Top)]. the paper is not sent to the reverse exit demurer roller. the curl adjustment is not necessary. The idea for the setting is shown in the table below. (c) Change the paper which is fresh from unpacking (low moisture content) (d) Even taking the above (a) to (c) and the curl is not improved. Printed paper curls (without RU connection) (1) Symptom Printed paper curls largely (2) Cause Decurl pressure is adjustable by 3-level for main body exit decurl roller and reverse exit decurl roller. suggest customer to use another type of paper. GO. Gradually decrease. [+1] and [+2]). Decurl adjustment condition is already optimized for the paper type (plain / fine /Coated <GL.69 and check the fusing ability then set the optimum value. Print 20 sheets of test pattern No. right curl Adjustment Curl direction smaller) Output curl Convex curl [2] → [1] → [0] adjustment Concave curl [0] → [1] → [2] Output curl (Back Convex curl 0] → [1] →[2]. MO>). on Top) adjustment Concave curl [2] → [1] → [0] When face-up is selected. . Setting to reduce curl (left curl larger. KONICA MINOLTA Confidential • Convex curl • Concave curl ← : Paper exit direction Table of contents .104 - . Please select the most suitable one for the user. 53 with 2-color solid (2) Cause When the toner attaching amount at the leading edge is much. (3) Solution Following 4 choices are available.105 - . KONICA MINOLTA Confidential 2. Fusing wrapping jam wra (1) Symptom When printing the following type of image on the thin paper. separation fails. it tends to wrap the fusing belt. Test pattern No. fusing wrapping jam occurs. Check the Toner Amount Save. 5. b. go to the step 2. If it is set to OFF.1. select the tray where the paper is loaded. Less margin at the leading edge. If it is set to ON.5. From the paper setting screen. . (a) Enable [Toner Amount Save] 1. Especially when the paper is very soft and thin. a. see the Note of the No. 3.106 - . .] and press [Next] twice to show [Toner Amount Save] setting. Press the [Change Setting] and check that [Process Adj. Press [Process Adj. Change the setting of [Toner Amount Save] from [OFF] to [ON]. access service mode and change the DIPSW1-0 to 1. (To show paper setting) and restart from step 1.] is shown. KONICA MINOLTA Confidential 2. 4. If it is not shown. Table of content . dark high chroma color. the fusing under offset may occur. Change the DIPSW1-0 to 1. check the original image lead edge if it can be erased. the following image reproduction may be slightly get poorer comparing with the OFF setting. Change the DIPSW 1-0 to 1. Then print the image. DIPSW2-2 (Text/Graphic part). 2. DIPSW2-1 (Image part). Note Since the paper is strongly blowed down. Press [Strong] to increase air volume. 69 by 20 sheets and confirm no fusing under offset occurs. This may cause the scratch. (c) Adjust Fusing Air Separation Air Level Setting 1. Gradually decrease the temperature. Or. "0": Normal level "1": Stronger If the setting "0" (Norma level) for each is not enough. 2. Change the DIPSW 1-0 to 1.107 - . (However. the side effect also occurs stronger) (b) Fusing temperature adjustment 1. Press [OK] twice to exit individual paper setting. Notes · When the Toner Amount Save control is set to ON. KONICA MINOLTA Confidential 5. shadow part. · Toner Amount save level is selectable from 2-level by the following DIPSW. Access [Machine]→[Paper Setting]→[Change Setting]→[Process Adj]. On the Paper Setting. if the temperature is decreased while continuous printing. confirm that the [Toner Amount Save] is set to ON for the desired tray. the paper may be pressed against the claw or guide at the non-fusing side. Adjust the [Lead Edge Erase Quantity] to set the maximum erasure width of the leading edge image Note Since the lead edge image data is erased. mind this when the setting is combined with the "Fusing Temeprature Adjustment") (d) Adjust Lead Edge Erase Quantity 1. fusing under offset occurs. 2. Therefore. Access [Machine]→[Paper Setting]→[Change Setting]→[Process Adj] and Decrease Upper Fusing Roller Temperature of each tray. adjust the temperature while checking the image. Access [Machine]→[Paper Setting]→[Change Setting]→[Process Adj]. Note When the temperature is decreased too much. try setting "1" (Stronger). Especially. The target of the adjustment is by 10ºC (Maximum 20 ºC) Print test pattern No. No feed jam (J-1101/J-1201) (1) Symptom No feed jam occurs (J-1101 and J-1201) when the paper is fed from main body tray. When the plate lifts up. Sides regulating Fixing plates material Lift up plate (c) Roller The dust attaches to the roller surface or roller gets worn. wrinkle.108 - . . static electricity.6. glue attachment. (b) Side regulating plates When the side regulating plates is fixed with screw while they are pressed strongly against the paper. This causes no feed jam. (2) Cause (a) Paper Corner of the paper is fold (dog year). (3) Solution (a) Paper Manually separate paper well (b) Reset the side regulating plate Loosen the fixing screw for the side regulating plates at front and rear. Then. set the regulating paper without stopping against the paper (paper should not contact regulating plate) then fix the screw. bur is on the paper. the paper contacts with side regulating plates and friction increases. the top of the regulating plates tilt inward as shown in the below figure. KONICA MINOLTA Confidential 2.1. 4 Separation pressure . the gap is created. as paper feed solenoid does not move by the weight. move the side plates then tighten again. increase the weight on the pick up roller (65AA4008 Paper feed Auxiliary Plate) as shown in the photo below to increase the load. This may cause the loosened screw or shift of the weight Note The screw may get loosened or steel plate position may move. change the P2 load to "Strong".109 - . So. (d) Add P1 load When the paper stops at paper pick up roller or paper does not reach to the feed roller. KONICA MINOLTA Confidential Loosen the knob of the screw. (Refer to the Service manual "9. (e) Add P2 load When the paper stops on the feed roller or paper leading edge stops at the downstream of paper feed roller. Do not attach the weight to C8000/7000/6000/6501/5501. (c) Roller Clean the roller to remove paper dust and any soilage or replace it. Add one piece of 65AA41008 When the weight is added. carefully apply the solution. Mechanical Adjustment→9. 110 - . Table of content . replacement of the spring to the one used for C8000 (56AA4042. multi-feed preventing spring) may be effective. the multi-feed may increase depending on the paper. So carefully apply the adjustment. KONICA MINOLTA Confidential adjustment of the paper feed tray/1 and the paper feed tray2) If the symptom does not improve by "strong" setting. Note When the load of P1/P2 is increased. Clean the fusing paper exit roller.111 - . Clean the roller indicated in the below figure with the cleaning pad and the drum cleaner. dent is seen every 48mm cycle in sub-scan direction (FD).7. KONICA MINOLTA Confidential 2. . Rotate to arrowed direction little by little and clean the surface to remove the foreign material. (3) Solution 1. Pull out the ADU mount and open the reverse section.1. Dents on paper at 48mm cycle in FD (1) Symptom On the print. It is pressed to the paper and appears as dents on the paper. (2) Cause The toner accumulated on the fusing separation claws drops and attaches to the fusing paper exit roller. roller surface with the cleaning pad and drum cleaner for all 5 claws Clean this area Note Do not break the tip of the claws while cleaning. Clean the fusing separation claw Pull out the ADU mount and open the reverse section. Table of content .112 - . Open the side paper exit plate of the fusing unit and clean the paper contacting side of the separation claw. KONICA MINOLTA Confidential 2. Correct PF-602m/PF-707 position/and its tray position →Please refer to the Service manual : I12. adjust to the correct position. If the cleaning not enough. follow the workflow in the next step. Centering sensor (on the main body) broke. 2.1. Clean the centering sensor of the main body with the Kim wipe etc. paper dusts attaches and causing erratic detection. (b) PFU caused 3. If the size setting is unmatched with the actual size. (a) Main body registration unit caused 1.3. Centering error (±5 mm or more) (1) Symptom Image centering error by 5mm or over occurs. PF-707/602m or its tray position is not correctly aligned with the main body. . (a) When the cause is on the main body (Degas) registration unit. 1. set the correct size. (b) When the cause is on the PF-602m/PF-707 3. Note After cleaning or replacing the centering sensor. (4) Solution Following in the workflow chart at the last part of the document. Off centered <Normal> <Centering error> (3) How to identify cause unit At the beginning. (2) Cause The cause could be on the registration unit on the main body (C1060/1070 series) or PFU (PF-707/602m) . KONICA MINOLTA Confidential 2.8.113 - . check whether the paper size is correctly set / paper is set to the tray correctly.2/I12. If the paper is not neatly set to the tray. 2. On the centering sensor of the main body. If the paper size is set correctly and the paper is set correctly. conduct the centering adjustment. replace centering sensor on the main body. try the solution step by step. Part number: A50UM55100 .114 - . [3] Centering sensor [4] 3. Lifting up the centering sensors [3] and the holder [4]. replace the centering sensor. Remove screw [1] x 3pcs and the cover for the centering sensor [2]. [2 [1 2. Clean the centering sensor 4. KONICA MINOLTA Confidential (5) How to clean /replace centering sensor 1. If the cleaning is not enough. Clean the sensor on the main body No Symptom recur? Check the dust Yes attachment to the centering The sensor on the sensor on the main body broke main body. Set the paper size setting correctly and then set the Yes paper correctly on the tray Does the symptom limited to PFU feed? (Not for main body tray) Yes Location: PFU No Failure location: Main body Check PFU and tray position (Should align with main body). KONICA MINOLTA Confidential Flow of the work Note: The sensor in the below flow means centering sensor. Replace the sensor on the main body Table of content . Centering error (over ± 5mm) Paper size setting is No correct and paper is set to the tray correctly.115 - . paper stick or repel and move due to the static electricity on the paper. 27-2=1(Connected)  RU-517 G00-19 (I/C ROM) DipSW 27-4=0(Unconnected).9.  HM-102 equipped. KONICA MINOLTA Confidential 2. set the paper to go through HM path.  Connected OT-502: Install RU-517  Connected other finisher: Install RU-516 FW version  RU-516 G00-17 (I/C ROM) DipSW 27-2=0(Unconnected). On [Machine] tab. the paper gets static electricity and following symptom occurs. Because FW version G00-18 has connection failure with RU-517. 27-4=1(Connected) Note When connect RU-517. ① ② .  Paper type is color paper or coated paper  Paper weight is 136gsm or over 1. (3) Solution 1. install FW version G00-19.1. press [Paper Setting]. Install RU-516 or RU-517.116 - . ・ No feed jam or double feed jam occurs on off-line finisher ・ Center folding is not performed correctly ・ Paper curls on the exit tray (2) Cause While stacking the paper on the tray. 2. Paper stick with each other due to static electricity (1) Symptom When the printed paper stacked on the output tray. ・ Output paper is not aligned ・ Output paper stick to the exit tray ・ Staple position shifts. When the environment applies to the following conditions. KONICA MINOLTA Confidential 2.117 - . ① ② 3. . Select a tray to use then set [Change Set]. Press [Curl Adjusment]. KONICA MINOLTA Confidential 4.118 - . Set the [Humidifier Set] to [ON] . ① ② 2. On [Machine]. pres [Paper Setting]. 1. When the condition does not apply to the above 1 or the step 1 does not improve the symptom.119 - . ① ② . increase the 2nd transfer output adjustment values by every +10. Select the tray to use and press [Change Set]. KONICA MINOLTA Confidential 3. • At the adjustments change both 2nd Transfer Output Adj.]. Note • To confirm if the setting change does not affect to the customer image quality. Press [Process Adj. • Referring to the following table. Select [2nd Transfer Output Adj (Front)] and change the setting by every +10. (Front) and 2nd Transfer Output Adj. 4. . (Back).120 - . (Back)]. Also change the setting for the [2nd Transfer Output Adj. print the image which customer uses. KONICA MINOLTA Confidential 3. 2nd transfer Rear Edge (Front) and 2nd transfer Rear Edge (Back) adjustments should be changed together. 121 - . Sticking slightly Level 3. Suggest customer to change paper type referring to the following test result.5x11 Simplex Level 3 Table of content . Sticking heavily Level 2. Photo image  Coverage .5x11 Duplex Level 2 OKTop Coated 128gsm A3 Simplex Level 3 Coat OK Kinfuji Coated 186gsm A4S Simplex Level 3 Sunmat Coated 186gsm A4S Simplex Level 3 KM Colr+ Uncoated 81. Not problematic level Brand Type Weight Size Mode Level OK Kinfuji Coated 157gsm A4 Duplex Level 1 Satin Coated 157gsm A4 Simplex Level 3 Kinfuji KM color+ Uncoated 81. separate the paper by hand before setting to the off-line finisher. YMC 60% each and K30%  Test result QA evaluation result is as follows Level 1. KONICA MINOLTA Confidential Adjustment value for 2nd transfer Rear Edge (Front) and (Back) 2nd transfer 177gsm or less 178gsm to 300gsm adjustment value +10 No need to adjust -10 +20 No need to adjust -20 +30 No need to adjust -30 5.4gsm A3 Simplex Level 3 HM-T Uncoated 75gsm 8. Test conditons  Image type . 4. If the symptom is problematic for the use of the off-line finishers.4 gsm A4 Duplex Level 2 HM-CC Uncoated 105gsm 8. ) +J31-06 : Paper wrap up its middle. Paper removing procedure on fusing wrap up JAM (1) Symptom Fusing wrap up JAM is indicated J31-02 or J31-06.122 - .5 FW) conditions View from exit almost 100 X 148（postcard） View from entrance => depend on paper size A4 Trailedge is not seen .10. (No entrance JAM is indicated same code. KONICA MINOLTA Confidential 2. (This code will be applied on Ver1. +J31-02 : Paper wrap up its leadedge.1. (Please pay attention for toner dirty around fixing unit especially to remove long length papers.123 - . (2) Solution procedure 1. And turn the knob M5 to clock wise on need.) M5 M5 2. →Paper can be appeared. . KONICA MINOLTA Confidential A3 A4S Short length papers may not be seen easily. Please find carefully especially behind of upper plate. Turn the knob M5 to clock wise carefully. To remove JAM paper (a) For long length paper that trailedge is seen Pull out the paper by holding the paper where toner fixed. 124 - . Therefor you can hold paper by hand easily. KONICA MINOLTA Confidential Pull out Holding the paper around here (b) For short length paper that trailedge is not seen. Holding the paper around here Pull out ・ Paper condition is difficult to hold by hand Insert the other paper into between belt and JAM paper and turn the knob M5 to counter clock wise. . Paper stuck perfectly : At first use the other paper corner edge and insert gradually. ・ Paper condition is easy to hold by hand Pull out the paper by holding paper with paying attention to belt and roller those are very hot. Turn the knob M5 to clock wise until leadedge can be seen. Then paper separate from belt. And pull out as shown in 2-2-1. KONICA MINOLTA Confidential Paper stuck unperfectly : Use the other paper line edge. Recommended the other paper is thick paper or folded paper. 3. Put into cleaning mode with white papers (This mode is available on default setting.) Table of content - 125 - KONICA MINOLTA Confidential 2.1.11 J-3102, Thin paper feed failure at the 2nd transfer unit (1) Symptom When the J-3102 occurs, the paper stops between the fusing unit and the 2nd transfer unit. (2) Cause (a) The leading edge of paper is not separated and wraps the intermediate transfer belt (Fig 1, (a) direction) Occurrence condition Paper type Plain (recycle) / High Quality / Color Paper Paper weight 62 to 71g/m2 Environment Low temperature, low humidity (b) The leading edge of the paper hits the leading edge of the separation discharge or enters the space between separate discharging Assy and the 2nd transfer roller then wrapping the roller. (Fig 1, (b) direction) Occurrence increase condition Paper type Coated paper Paper weight 81 to 91g/ m2 Environment High temperature, high humidity (a) direction (b) direction Separation discharge plate unit Normal paper path Fig.1: Paper path (3) Solution (a) Direction 1. Adjust the separation current Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Adjust Separation AC and DC from Machine→[Paper Setting]→[Change Set] →[Process Adj.]. 2. Change setting of Output Curl Adjustment value to the [2] [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Output Curl Adjustment] →[2] 3. Adjust the discharge needle location 1. Remove the separation and discharge plate unit from the 2nd transfer unit. 2. Remove the position adjustment pins set inside of the both sides of 2nd transfer unit 3. Reinstall the pins using the upper hole. 4. Reinstall the separate discharging plate unit 4. Replace the separate discharging plate unit. Remove the separate discharging plate unit from the 2nd transfer unit. - 126 - KONICA MINOLTA Confidential Install the new one. (b) direction 1. Change paper condition Dehumidify the paper or set the paper upside down in the paper cassette. 2. Adjust the discharge needle position 1. Remove the separate discharging plate unit. 2. Remove the position adjustment pings set inside of the both sides of 2nd transfer unit. 3. Reinstall the pins using the lower hole 4. Reinstall the separate discharging plate unit. 3. Replace the separate discharging plate unit. Remove the separate discharging plate unit from the 2nd transfer unit. Install the new one. Note: When the paper type, paper weight and the ambient condition changes, return the discharge needle position to the center. Separate discharging plate unit Remove from 2nd transfer unit. Feed direction Discharge needle position adjustment location When the discharge needle assy is removed, Pins as shown in Fig 2 can be seen. 図 2．2 次転写ユニット概要図 - 127 - 4: The needle adjustment mechanism (Machine rear) adjustment direction Table of content .128 - . KONICA MINOLTA Confidential Feed Direction Indication: Joint part with intermediate transfer unit Discharge needle position adjustment Remove pin 2nd transfer roller Fig. 3: The needle adjustment mechanism (Machine rear) Feed Direction Upper: For cause (a) Lower: for cause (b) Fig. 3. 5. Adjust fusing temperature [Machine]→[Paper Setting]→[Change Set]→[Process Adj. KONICA MINOLTA Confidential 2. Note: To prevent toner from detaching. The target of the adjustment is to reduce by 10°C (Max is 20°C). check the printed paper and decide the optimum setting from 0.  Insulating Plate /Front (A50U7448912)  Insulating Plate /Front (A50U749112)  Fusing Roller/1 (A50U720111) Table of content . To confirm. Consequently.1.129 - . Gradually reduce the temperature. set the temperature which does not cause fusing under offset. (3) Solution 1. Change De-curler setting Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Change the paper which is just unpacked (low moisture content paper) 4. [Machine]→[Paper Setting]→[Change Set]→[Process Adj. the paper lead edge of the 2nd side cannot enter to the fusing unit stably and wrinkle occurs. the curl becomes larger after printing on the 1st side. Paper curl direction changes according to the paper characteristic. print 20 sheets of test pattern #69. (2) Cause Depending on the paper type and moisture in the paper.]→[Upper Fusing Roller Temperature] Reduce temperature for respective trays.]→[Output Curl (Back on Top)] 2. also replace following parts together because old and new are not compatible. Replace with [Guide Plate/B (A50U758201)]. If the above steps do not solve the symptom. +1 or +2. Note When replace old type Guide plate (A50U747402) with [Guide Plate/B] of new type.12 Paper wrinkle at duplex printing (1) Symptom Paper wrinkle occurs during duplex printing. Therefore. ask customer to use another type of paper. (5 claws) Clean this area Note Be careful not to break the tip of the claw. Table of content . open paper ejection plate then clean the contacting side of the roller with the cleaning pad and drum cleaner. It is recommend to apply solution of [1. KONICA MINOLTA Confidential 2. (2) Cause Toner is built up on the fusing separation claw and tip of the claw is slightly moves to the paper conveyance path direction and catches paper.130 - .3.21 Image offset caused by fusing unit]. Pull out the ADU mount and open the reverse section.1. (3) Solution Conduct periodic and spot cleaning of the fusing separation claw.13 J-3201 paper is caught by the fusing separation claw (1) Symptom The leading edge of the paper is caught by the separation claw and jam occur. Note The fusing separation claw may have gotten dirt because of fusing offset. the edge of the paper is lifted up by the fusing exit actuator.14 Corner folding at the paper leading edge. Referential image (2) Cause When the paper is not stiff.1.131 - . KONICA MINOLTA Confidential 2. corner folding at machine front size may occur. The paper may enter to the fusing exit roller with this state. Depending on the paper pass. machine front side (1) Symptom When printing on thin small size paper. the possibility of the corner folding occurrence becomes high. When the paper enters to the fusing exit roller upper in the very vertical angle. the fusing exit roller entering angle is different and this causes the symptom. Rear Front Center of paper feed Paper Actuator is positioned at machine front side Fusing _Left side view . less than 100gsm paper and A6 size. Example of condition: uncoated paper. adjust the temperature of the fusing roller upper to + (plus) direction or fusing roller lower to the . Paper entrance angle to the fusing exit roller varies depending on the paper Upstream Fusing unit_Cross Section (Front view) Conditions which symptom tends to occur more often • Paper width: Approx. KONICA MINOLTA Confidential Actuator lifts up the edge of the not Downstream stiff and narrow width paper.(minus) direction and let the paper move along the upper guide. 100 to 110mm (Trailing edge corner of the paper interfere with the actuator) • Paperweight: 100gsm or less (Stiffness is very low and paper path is regulated by the actuator before entering to the nipping part of the fusing exit roller) (3) Solution To change the paper entering angle to the fusing exit upper roller. be careful not to cause the wrapping of the fusing upper belt. Table of contents .132 - . Note When increasing the fusing upper roller. it does not success: Service mode [Machine Adjustment] → [Quality Adjustment] → [Printer Gamma Adjustment] → [Printer Gamma Offset Auto]. (2) Cause Some of image cannot be adjusted with printer gamma offset automatic adjustment if it is outside of adjustment range. Printer gamma offset automatic adjustment does not complete normally after trying several times (1) Symptom Though performing Printer gamma offset automatic adjustment. (3) Solution The maximum number to repeat Printer gamma offset auto adjustment should be 5 times.1.1. perform Printer gamma offset adjustment instead. Perform [Printer Gamma Offset Adjustment] only for the screen failed to adjust with the automatic adjustment in 5 screens Table of contents . If the adjustment does not complete normally. KONICA MINOLTA Confidential 3.133 - . “dehumidifying” is displayed. • Even under high humidity environment.1. even dehumidifying completes once then the tray is pulled out. no feed jam of the coated paper under high humidity tends to occur. Optional HT-503(PF602m)/HT-506(PF707) is equipped. Print job is not accepted while machine indicates dehumidifying (1) Symptom The machine indicates dehumidifying and print job is not accepted for a while. Note • Since dehumidifying operation does not complete.134 - . (3) Solution Change the setting of DipSW18-4 Print during temperature control by dehumidifier heater from 0: Prohibited → Allowed The machine receive print job even during the warming up of dehumidifier heater. Table of contents . printing is not accepted until the sensor in the tray detects certain temperature with the default setting. dehumifying is performed only for coated paper. For example.2. KONICA MINOLTA Confidential 3. no feed occurs mostly on coated paper. (2) Cause When dehumidifier heater is installed to the tray to enhance coated paper feeding ability under high humidity environment (humidity is 56% or over). Therefore. 135 - .3. Notes of updating the FW from earlier than ver1.) . the registered Scan Address and E-mail Title & Text become abnormal.1. KONICA MINOLTA Confidential 3. (Display is garbled. (b) [Scan]→[E-mail]→[Option Setting]→[Text Setting] ([Utility]→[Scan Address Register]→[E-mail Text Setting]) →The setting get abnormal due to referring to the text of [Group] Setting after updating FW.5 (Scan Address/E-mail Title & Text) (1) Symptom When updating the FW I0-G00-15 or later from earlier than ver15 (G00-15). (a) [Scan]→E-mail]→[Option Setting]→[Title Setting] ([Utility]→[Scan Address Register]→[E-mail Title Setting]) →The setting is deleted due to referring the [Group] Setting data after updating FW. 5) →[WebDAV] address setting is set abnormally due to referring to the registered text of [E-mail Title Setting] and [E-mail Text Setting] after updating FW.136 - . (d) [Scan]→[Group] →[Group] setting is deleted due to referring to the blank area after updating FW. KONICA MINOLTA Confidential (c) [Scan]→[WebDAV](New function from ver1. Before ver.up . Table of contents .[Group] from the customer.5 on bizhub PRESS C1070 series. KONICA MINOLTA Confidential After ver.137 - .[WebDAV]. (3) Solution  Confirm original setting of [E-mail]→[Title Setting]/[Text setting].[Group]. some registered address and text are not linked correctly and abnormal text or symbol is displayed after updating the FW.up (2) Cause The function of "Scan to WebDAV" has been added at ver 1. Register the original setting of [E-mail]→[Title Setting]/[Text setting]. So.  KMI recommended to record these setting before updating FW. But some referring data area of Scan Address mistakenly have moved due to inserting WebDAV Address data area.  Delete all abnormal setting of [E-mail]→[Title Setting]/[Text setting]. C-2451. (Charging output OFF) →Since the drum cannot be charged and machine keeps creating solid image. -The charging corona unit is half installed. C-2452. C-2453 and C-2454 occur (1) Symptom C-2451. However. not fitted firmly) →The drum is abnormally charged and carrier attaches. developing unit / charging corona replacement and cleaning. C-2452. (Charging output ON / Grid output ON) →Since the drum potential is low and machine keeps creating image. (Charging output ON / Grid output OFF.138 - . -The charging corona unit is half installed. Firmly set the charging corona unit until it is locked at the upper position.2. C-2453. KONICA MINOLTA Confidential 3. the toner density is largely reduced and SC occurs. C-2454 or carrier attachment may occur when performing the Toner Density Sensor Init adjustment at developer replacement and machine setup. be careful so as not to transform with strong push. (2) Cause The charging corona unit is not installed correctly. (3) Solution Please check charging corona’s fitting condition at the machine setup. Table of contents . the toner density is reduced and SC occurs.1. The charging corona unit is not installed or half installed. To see the position easily.2. KONICA MINOLTA Confidential 3. (2) Cause By repeating the pulling out and pushing back the ADU mount. it is disconnected and C-3102 may occur. 2. Seat the A50UN188 connector to rear side and the A50UN155 connector to front side. Consequently. remove the wiring protection cover and the process mount cover.139 - . (3) Solution 1. A50UN188 may get tensed too much and is caught by the connector for the A50UN155/N156 wirings. Move the red binding band for the A50UN155/188 to left side by 10 to 20mm (blue area) from the base line as shown in the figure. [Top view] Rear side Base line A50UN188 Left Right 10mm A50UN155 20mm Front side Wiring protection cover .2. C-3102 ADU wiring connector is disconnected (1) Symptom C-3102 occurs because a connector for ADU wiring (A50UN155/N156) is disconnected. 140 - . KONICA MINOLTA Confidential Process mount cover [Rear view] A50UN15 10mm 20mm Base A50UN1 line Note When the red binding band for A50UN155/188 is at the right from the blue area. interemediate conveyance guide plate should be removed. . When moving the wirings. move the wirings to the arrow indicated direction. 141 - . KONICA MINOLTA Confidential Table of contents . KONICA MINOLTA Confidential 3. Process mount Check here Intermediate transfer unit Color registration unit . (1) Symptom After setting the process mount and turning on the power switch of the machine. If the color registration unit stopper moves inside of the intermediate transfer unit side plate. pull out and pushing back the unit again.142 - . check whether the process unit is correctly set. color registration unit is not positioned correctly. C-4521 may occur.3. C-4521. (3) Solution Referring to the check location in the figure below.2. (2) Cause Color registration unit is stopped by the side plate edge of the intermediate transfer unit to keep correct position. position is wrong. If not. KONICA MINOLTA Confidential (a) Correctly set state Intermediate transfer unit side plate edge Stopping at the edge Color registration unit stopper contact with side plate of the intermediate transfer unit .143 - . 144 - . Table of contents . • Color registaration unit stopper completely entres and there is no space at circled position. KONICA MINOLTA Confidential (b) Wrongly set state • Color registaration unit stopper enters inside intermediate transfer unit. disconnect the large connector when you detach the option unit.145 - . the control board of the option unit may be damaged. First of all. If this occurs the operation panel displays the system configuration without the faulty option.3. connect the large connector when you attach the option unit. System configuration display without options (1) Symptom If replacing the option unit and the large connector is disconnected immediately after the main power is off. Options cannot be recognized. (2) Solution Last of all.1. Table of contents . KONICA MINOLTA Confidential 3. Insert the developer charger jig then rotate arrowed direction (clockwise) in the following . eject the developer using the developer charger.2. referring to the following procedure. How to eject developer (1) Outline When the developing unit caused image failure occurs. Remove 2 screws and release the claws (4 positions) on cover 2. Upside down the unit so that the developer roller comes to the top. Developer charger (coupling D)：A50U3436 Input (2) Procedure 1. Hook the wirings 3. Disconnect the connector and hook the wirings to the gear cover. KONICA MINOLTA Confidential 3.146 - .3. Eject the developer Eject the developer 4. 147 - . KONICA MINOLTA Confidential photo. Table of contents .) (3) Other use example Screwdriver can be connected with the developer ejection jig for easier rotation. to drop the developer attaches to the developing roller and around inside the unit. (Never rotate counterclockwise direction. Repeat the step 3. 3. KONICA MINOLTA Confidential 3. . Consequently. (2) Cause (a) Shifting to machine front by 5mm Paper dust etc attaches to the surface of centering sensor and the sensor mis-detects the paper position. It is to prevent the attachment of the paper dust to the sensors.148 - . Normal 5mm shift to machine front Feed Feed direction direction Image shift (b) Lead edge timing or CD-magnification is extremely out of standard Paper dust attaches to the surface of centering sensor and the sensor mis-detects the paper position.3. registration roller dust remover and all conveyance rollers. vertical zoom is extremely out of alignment. Timing. Consequently. Image shift (1) Symptom Image is off-centered by 5mm to machine front direction. Normal Margin at lead edge becomes wider Feed Feed direction direction Image shift (3) Solution Clean the centering sensor and lead edge detection sensor to remove the paper dust. Also clean the registration roller. the margin at the lead edge becomes wider. the registration roller is moved by maximum distance and the image is shifted to front side by 5mm. 149 - . KONICA MINOLTA Confidential Centering sensor (PS1) Lead edge sensor (PS18) Table of contents . 3. Hard to pull out process mount (1) Symptom The process mount does not slide smoothly and pulling out and pushing back of the unit is difficult. Limited to the initial production. KONICA MINOLTA Confidential 3.4. Main body S/N A50UA331G0000223 A50UA331G0000238 A50UA331G0000247 A50UA331G0000295 A50UA331G0000342 A50UA331G0000432 A50UA331G0000440 A50UA331G0000550 A50UA331G0000558 A50UA331G0000577 A50UA331G0000582 A50UA331G0000584 A50UA331G0000588 A50UA331G0000591 A50UA331G0000592 A50UA331G0000593 A50UA331G0000596 A50UA331G0000598 A50UA331G0000623 A50UA331G0000624 A50UA331G0000625 A50UA331G0000635 A50UA331G0000636 A50UA331G0000682 A50UA331G0000689 A50UA331G0000690 A50UA331G0000691 A50UA331G0000702 A50UA331G0000706 A50UA331G0000709 A50UA331G0000714 A50UA331G0000715 A50UA331G0000717 A50UA331G0000725 A50UA331G0000726 A50UA331G0000727 . the grease is not applied to the DU flange and enclosed with the main body.150 - . (2) Cause The grease was not applied to the DU flange at factory then enclosed with the main body. whole circumference). . 1. Dip the tip of the precision screwdriver to the grease and apply the grease to the DU flange.151 - . Type of grease Recommendation: the MOLYKOTE®AI-6159 the MOLYKOTE® EM-50L the MOLYKOTE® EM-30L 2. Where to apply the grease Apply to DU flange DU flange Apply to the red marked face entirely (whole width. KONICA MINOLTA Confidential Spare DU-105 S/N A5WH0Y0000001 to A5WH0Y0000108 (3) Solution Apply the grease referring to the steps in below. KONICA MINOLTA Confidential 3. apply thinly. NG Lump of grease Table of contents . To avoid the lump of the grease.152 - . Make sure to install correctly and check it slides smoothly. If it is not installed correctly. the shutter does not close completely and the toner may spill. Attach the spring spring .3. Remove the tape tape spring shutter 2. Clean the toner outlet 3. KONICA MINOLTA Confidential 3.153 - . Note for the developing shutter installation work (1) Symptom Following is the important points to fit the shutter to the developing unit at service visit. (2) Solution How to install developing shutter 1.5. pull out shutter while lifting up the claw. Note In case the shutter does not close. KONICA MINOLTA Confidential 4. Tilt the shutter aslant then gently press down the seal on the shutter. Return the shutter to horizontal position. 6. Claw Table of contents . Insert the shutter while pressing the spring by the prolusion of the shutter. and go back to step 2. seal 5. Open and close the shutter 5 times and check if it slides smoothly.154 - . 3. (3) Solution By changing the following DipSW. It may occur when turning ON the power switch 1st in the morning under low temperature and low humidity environment + roller count reaches later half.6. low humidity (1) Symptom Productivity decreases first in the morning under low temperature and humidity.155 - . KONICA MINOLTA Confidential 3. Table of contents . the speed down can be released. Productivity decrease at first in the morning under low temperature. Depending on the case. DipSW 5-2 = 0: Speed down depending on the cases (Default) 1: No speed down due to the 2nd transfer output shortage Note The setting does not affect to the mode which decreases speed to keep fusing ability. color change due to poor transfer may occur. When the machine is in the state. (Changed from high speed to low speed) (2) Cause C1070 series decreases the speed by one step when the necessary voltage capacity to supply current to the 2nd transfer section is not available. the middle speed is applied for the thin paper printing until starting the next job and productivity decreases. (The cleaning blade wears earlier) DipSW Settings Toner band creation interval can be changed by the following setting.000 over band is reduced. Toner 270. For A4 size print (Default setting) Toner band creation interval (by the mileage of the belt)(Unit: mm)) Paper width Internal 260mm and Less than Remark temperature over 260mm 35 ºC and 270. Please understand the content well before using the setting. (3) Solution When the productivity has the priority over the life of intermediate transfer cleaning blade.500 ・When the temperature increases.500 13. So.000 13.156 - . (2) Cause Small size print under high internal machine temperature promotes the intermediate transfer cleaning blade wearing. KONICA MINOLTA Confidential 3. the toner band creation cycle can be change. So. the 120mm size toner band (30mm of each color x full length in machine front to rear direction) is created at every approx.000 270.000 ºC 2. 50 pages.000 270. over . Note The grayed hatched [For high temperature] and [For narrow size paper] is the very individual action and not described in the service manual. the early wearing of the CL 270.7 Release of productivity down mode for small size print under high temperature (Adjustment of toner band creation cycle for cleaning blade) (1) Symptom When the internal temperature is 35ºC and over and paper width is less than 260mm.500 over Default setting Less than 35 270. For high internal temperature (& for wide size) Paper width Internal 260mm and Less than Remark temperature over 260mm 35 ºC and 13. Less than 35 However.000 270. 97%. toner band is created in shorter interval to prevent too much wearing.000 ºC blade would occur.3. Priority on productivity Paper width Internal 260mm and Less than Remark temperature over 260mm 35 ºC and Productivity has productivity. the productivity is reduced to approx. Priority on For high For narrow size DipSW For A4 width productivity temperature paper 20-3 0 1 0 1 20-4 0 0 1 1 1. 3. 000 270. ºC Comparison of the productivity (Reference) 1.500 270.157 - .000 13.000 Productivity 97% 100% Table of contents .000 continuous print of A4size. ・ When the wide size is printed after Less than 35 270. the wearing outside of the 270. CL blade ºC wearing is promoted at the area outside of A4 size. Comparison with the predecessor model (Default setting) Paper width Internal 260mm and Less than Remark temperature over 260mm C1070 series 100% 100% or 97% Productivity is the same or higher on 95% C1070 series for all conditions than C7000 series 100% or 99% C7000 series 2. 4. Degas productivity by toner band creation cycle Toner band creation cycle Remark 13.500 paper width may be promoted.000 13. KONICA MINOLTA Confidential the wearing is promoted.500 over and the wide paper is used Less than 35 occasionally. For narrow paper Paper width Internal 260mm and Less than Remark temperature over 260mm 35 ºC and When the narrow paper is used often 270. 8.3. . Consequently. Locked Released (2) Cause The stopper material attached to the main body got deformed and the lock cannot be set and released. ADU MT lever is very hard to release (1) Symptom ADU MT lever is hard to release and lock. KONICA MINOLTA Confidential 3.158 - . it is difficult to pull out and push back the ADU MT. remove the ADU MT. KONICA MINOLTA Confidential (3) Solution Replace the following part. Pull out ADU mount 2. Table of contents . 3. P/No: A50U830200 1. (Screw x 2pcs) Insert the screwdriver from this space. Remove the stopper part (A50U830200). Stopper part (A50U830200) Remove 2 screws.159 - . Replace the stopper part. If the work is difficult. Multi-feed of Plain/Fine paper under high temperatureand high humidity (1) Symptom Under high temperature and high humidity environment.1. (2) Cause As well as coated paper. KONICA MINOLTA Confidential 4. [Utility]→[User Setting]→[System Setting]→[Paper Tray Setting]→[Dehumidify Fan Heater Setting]→[Fan Heater Control (Tray**)]→[Compulsively ON] (2) Apply lock to the side guide When the dehumidifying heater is not installed or the fan heater compulsively ON setting is not enough. • Lock the side guide • Lock position is following 2 locations (front and rear) Side guide unlocked Side guide locked Table of contents . (3) Solution (1) Set the Dehumidify heater setting to Compulsively ON. use the side lock as mentioned below.160 - .1. the multi-feed occurs. paper tends to stick with each other. when very smooth surface plain paper or fine paper (Smooth finished etc) is fed. when the surface is very smooth and moisture attaches to the surface. g.1. 2) (2) Cause (a) Wrinkle depressing ability is lowered by the wearing of PFU registration roller. Replace all of the 3 rollers as a set. the paper lead edge posture is more unstable than Tray 3 and 4 and the symptom occurs more often and worse. Change tray When the symptom occurs at Tray 5 (bottom tray). At the Tray 5 (bottom tray).g. (Less occurrence from Tray 3 and 4 (top and middle trays)) Feed Direction Occur at the trailing edge of the paper. Table of contents . PF-707 Wrinkle on paper (1) Symptom When the thin paper (up to 91g/m2) is fed from PF-707. (b) PFU horizontal conveyance roller/1 and 2 gets worn and the speed difference occurs between registration roller. the wrinkle appears at the trailing edge of the paper.2. (Random position in the CD) (e. (3) Solution 1. The symptom occurs more often when the Tray 5 (bottom tray) is used and at the 1st page of a job. Replace PFU registration roller and horizontal conveyance rollers 1/ and /2. The rough indication of the replacement is around 1 million pages feeding.161 - . use the Tray 3 (top tray) and Tray 4 (middle tray) 2. KONICA MINOLTA Confidential 4. 3. Change PFU pre-registration loop amount Decrease PFU pre-registration loop amount. 1) (e. Pull out the tray to modify and remove the front cover (2 screws) Small cover 2.162 - . (3) Solution Insert the PET sheet to block the gap between belt unit and auxiliary paper guide. (2) Cause In case the auxiliary paper guide is used. when the air blows. one each at front and rear (one screw each) Remove the auxiliary lift up plates. .1. KONICA MINOLTA Confidential 4. Remove the small cover. Remove the auxiliary lift up plate (one each at front and rear) Remove the auxiliary lift up plate.PET sheet attachment procedure - 1. the paper gets on the gap between belt unit and auxiliary guide. paper skew becomes larger.3 PF-707 Paper skew of small size (1) Symptom When small size is fed (the auxiliary guide applied size). . Attach the PET sheet referring to the following procedure. the top 2 to 3mm should protrude as shown below. Temporarily fix the PET(190x20(mm)). Be sure to attach the PET sheet to the auxiliary guide at machine rear first. Pull out the auxiliary guide machine rear. Set the side guide at the most inner position.163 - . (Narrowest width) . While the temporary attachment. Peel off the release sheet of the PET and temporary attach the top part. KONICA MINOLTA Confidential 3. Base line 4. 164 - . However. reduce the protruding distance. 90g/m2) is fed. While looking through the window which is prepared at step 1. Target is less than 0. Attach PET to front side Repeat the step 3 to 6 work for the auxiliary guide. 8. Table of contents . attach rest of the PET sheet to the bottom.5mm. slowly insert the tray until the PET attached at step 3 approaches to the nearest position from the paper feed suction belt (should not contact).) If the PET contact with the belt. Reinstall the removed parts Attach the auxiliary lift up plates removed at step 2 and tray small cover removed at step 1. 6. if the PET sheet contacts with the belt. KONICA MINOLTA Confidential 5. 7. Note When the thin paper (up to approx. Decide the distance between PET and paper feed suction belt. After deciding position at top position. the edge of paper may be caught by the PET sheet and chain feed or multi-feed may occurs. the belt breaks. KONICA MINOLTA Confidential 4.1.4 PF-707 Corner fold (dog ear) and conveyance JAM of small size (1) Symptom When using the small size (Width near to B6S, 5.5x8.5S), the corner of the lead edge side is folded (front side is folded down side) Caused by the corner folding, conveyance JAM occurs at the downstream of the PFU tray exit. Corner folded location Feed direction (2) Cause When the edge of the paper is not suctioned by the belt, this part sags due to the air from the lead edge. When the paper is conveyed with this state, the paper edge hits the tray and the paper corner are folded.  The symptom occurs only with the paper which cannot be suctioned (B5S, 5.5x8.5S etc) (Indicated in red line in the figure below)  If the edge of the 1st sheet is lifted up by the floating 2nd or later sheet, the symptom does not occur. (Blue line in the photo below) Suction belt unit 1st sheet (Not 2nd or later occurring) 1st sheet sheets (dog-ear occurs) (lift up the 1st sheet) The condition symptom tends to occur  High humidity environment (moisture slows down the 2nd and later paper to float)  Paper weight 91g/m2 or less (especially, when it is not stiff enough, the edge of paper sags) (3) Solution To reduce the power to push down the paper edge, set 1 or more step(s) lower value for the Lead Edge Air Level Setting than Auto setting. [Machine] →[Paper Setting]→[Change Set] →[Air Assit]→[Manual]→[Lead Edge Air Level Setting] See paper behavior and decide the optimum value. Table of contents - 165 - KONICA MINOLTA Confidential 4.2.1. J-1710 countermeasue (1) Sympton Frequent jam (J-1710) occurs during paper registration because next sheet overruns. (2) Cause The overrun tends to increase if these clutches become loose due to the load of the brake for PFU horizontal conveyance & for intermediate conveyance of main body. Then, when the overrun becomes larger than threshold, the jam occurs. (3) Solution 1. Permanent solution for mass production line(PF-602m) 1. Torque limiter has been added to the drive section for the pre-registration roller. This reduces distance of the overrun. Note: It is not compatible with the old type PFU because it affects machine frame design. 2. Material of the pre-registration roller has been changed to non-magnetic type. Because the clutch performance decreases once it gets magnetized. 3. Schedule Machine: PF-602m Applied date: 4th July 2014 Cut in: A0U4WY2000889 NOTE: C1060/C1070 has added with another counter measure from the beginning of the mass production. 2. Solution for MIF 1. Attach the brake kit to intermediate roller of main body & pre-registration roller of PFU.(TNBT1300331JP) For Main body: C7000/6000 brake kit p/n: A1DUR90200 For PFU: PFU brake kit p/n: A0U4R90100 If you need to apply the torque limiter to the old type PF-602m, the whole horizontal conveyance assy should be replaced; Part: Whole of the horizontal conveyance Assy p/n: A0U4R70100. NOTE: A0U4R70100 is only availble for PF-602m(A0U4WY2) It is not available for PF-602(A0U4WY1) 2. For PFU, replace pre-registration roller to non-magnetic type. For PFU:Part: Registration Roller /Lower p/n: A0U4711000 NOTE: Recommend replace a pre-regit clutch at the same time. Subject Model Main body: bizhub PRESS C7000/C7000P/C6000/C70hc bizhub PRESS C1070/C1070P/C1060 PFU: PF-602/PF-602m Refer to following applicable PFU for each cuntermeasure parts - 166 - KONICA MINOLTA Confidential Counter Couter Regist Roller Measure Measure (Non-magnetic Brake Kit Parts ASSY for type) about Torque PF-602m limiter (Replacing (Replacing (Mounting (Replacing whole ASSY) Part) Part) Part) Horizontal A0U4R70100 - - - conveyance assy Pre-registration roller - A0U4711000 - - A0U4A71200 *2 A0U4R70100 Counter measure 56AA17471 Parts for overrunning. - - A0U4R90100 56AA40490 (Torque limiter / Brake A03U850101 kit) A0U4719500 A0U4719600 A0U4R70300 PF-602 N/A *1*3 (OK)*3 OK N/A*3 (A0U40Y1/A0U4WY1) PF-602m (A0U4WY2) OK (OK)*3 OK N/A*3 Before Modified PF-602m (A0U4WY2) OK OK - OK Modified *4 OK=Availble to replace, N/A=Not Available to replace, (OK)=Available to replace, but not guarantee due to lack of evaluation. *1 PFU Drive board for PF-602(A03XH01017) is not available to attach with the new horizontal conveyance assy(A0U4R70100). The new horizontal conveyance assy(A0U4R70100) is only compatible for PFU Drive board for PF-602m(A0U4H02000). *2 These parts are hard to assemble because it is frame of its unit. *3 It is not guaranteed due to lack of evaluation. *4 Cut in S/N : A0U4WY2000889 - 167 - Procedure of mounting new solution Component Parts Parts number name Component Quantity Remarks A1DUR90200 C7000/C6000 Brake Brake Plate (ADU) 1 For Main Body Kit Brake Spring 1 Common for Main Body and PFU Bearing 1 Common for Main Body and PFU Screw M3x12 1 Common for Main Body and PFU A0U4R90100 PFU Brake Kit Brake Plate 1 For PF-602/PF-602m* (PF-602) Brake Spring 1 Common for Main Body and PFU Bearing 1 Common for Main Body and PFU Screw M3x12 1 Common for Main Body and PFU A0U4711000 PF-602 Registration Non-magnetic 1 For PF-602/PF-602m* Roller /Lower Pre-registration Roller . KMI recommend to replace the pre-registration clutch(CL12) at same time.NOTE: Please make sure the shape of metal plate. KONICA MINOLTA Confidential 3.168 - . PF-602m is planning to modify for mass production line at July 2014. For Main Body For Main Body For PFU For PFU Image 1 :The state of the metal Image 2 :The state of the metal plate only. plate with bearing. It is different between PFU and Main body. . .169 - . KONICA MINOLTA Confidential Mounting procedure (For Main Body) Component Metal plate Spring Bearing け Attach to the roller shaft of the right rear side at ADU. bearing for intermadiate conveyance roller/2. Rear side of ADU . KONICA MINOLTA Confidential 1.170 - . Change a screw and remove a bearing of rear side. Remove a duplex section cover Rt. 3. 2. Remove a intermediate conveyance clutches(CL4) and E-ring. Remove a intermediate conveyance clutches/2 (CL4) and a bearing for intermediate conveyance roller/2. 171 - . Attach a countermeasure jig (bearing & metal plate) to shaft of intermadiate conveyance roller/2. 6. . KONICA MINOLTA Confidential Change a screw from (M3x6) to (M3x12) . And then attach a countermeasure jig (bearing & metal plate). Reinstall the original bearings (front/rear). *Original screw(shorter) => New screw(longer) Note : Do not touch the lower screw. 5. Reinstall the intermediate conveyance clutches/2 (CL4) and duplex section cover. (It has no relation with this modification. Attach a spring to countermeasure jig and replaced screw. Slide the shaft to machine front direction. Please mind the attaching Attach a spring direction of the bearing.) Remove a bearing of intermadiate conveyance roller/2. 4. 0 page G55-G56 "4. 1.172 - . Replace the registration roller to non-magnetic one. Front Rear Refer: The position is the Attaching position roller of PF4 knob.10 Horizontal conveyance unit" . KONICA MINOLTA Confidential Mounting procedure (For PFU) Component Metal plate Bearing け Spring Pre-registration roller / Attachment points This photo is showing from the bottom side of the horizontal Conveyance unit. Remove the Horizontal Conveyance unit of PF-602 Refer to Service manual v4.2. 173 - . Remove a bearing of Pre-registration roller. Replace pre-registration roller. Attach a bearing & metal plate to shaft of pre-registration roller. 4.Reinstall the original bearings (front/rear). . Slide the shaft to machine front direction. Note: Please mind the attaching direction of the bearing and the plate. Change a screw and remove a bearing. KONICA MINOLTA Confidential 2. PFU602_Front side PFU602_Rear side Change TP M3x6 to TP M3x12 3. 4. And then attach a countermeasure jig (bearing & metal plate). 7. (CSES ID: DLBT1407227EN) KMI recommend to update for ver. C1070 : ver. KONICA MINOLTA Confidential 5. Hook a spring to the metal plate. Note: Straight edge must contact with paper guide plate 6.I0-GC3-11 or later at the same time. Note: Please mind the attaching direction of the bearing and the plate.C-GM5-12 or later. (CSES ID:DLBT1406822EN) KMI recommend to update for ver. IMPORTANT: Update to the following FW C7000 :ver. Reinstall the Horizontal Coveyance unit. Table of contents .C-GMZ-40(GPZ-40/GQZ-40) or later.174 - . Hook a spring to metal plate and the screw replaced at step 2.I0-GD3-40 or later at the same time. Remove the outer cover following "G Disassembling/Reassembling" of the service manual. Irregular correspondence of the main tray exit (1) Symptom The exit unalignment in a main tray occur due to electrostatic adsorption or electrostatic repulsion. Remove the FS-532 from system. 2. ・ When PI-502 is connected PI-502 1. 4.3.1. 3. It removes. KONICA MINOLTA Confidential 4. Change part relative table Present Replace parts A4F37179(Q'ty2) A4F38999 (Q'ty 2) A4F37180(Q'ty 1) A4F38998(Q'ty 1) Replacement procedure 1. (3) Solution Replace of the neutralizing brush of a main tray exit part. The main power switch turned OFF. (2) Cause The neutralizing effect of the neutralizing brush adopted as dirt of paper leading edge correspondence may not fully be acquired.175 - . when PI-502 is connected. Remove the cover(2 screws) . 4. 5.[1] 2. Loosen 2 screws. remove 2 screws [3] and then remove the upper cover/Rt2[4]. Remove 2 screws[1]. Remove the upper cover/Rt1[2] in the arrow-marked direction. KONICA MINOLTA Confidential ・When PI-502 is not connected 1. Open the front door[2]. Remove 3 screws [1] and remove the upper cover/Fr1 [2].176 - . 5. . Remove the rear cover. 3. Disconnect the connector [1] and remove the uppercover/Fr2 [2]. Remove 3 screws [1] and then remove the upper cover/Rr [2. KONICA MINOLTA Confidential 6.] . Remove 7 screws [1].177 - . 7. 8. Remove the front door. 10. Exit part cover .178 - . and remove the sub tray [2]. 11. KONICA MINOLTA Confidential 9. Remove the upper cover/Md. Remove 4 screws [1]. Remove the exit part cover. KONICA MINOLTA Confidential 12. It removes. 14. Replace and stuck of the neutralizing brush. Remove the 2 screws from the inside of a machine. Change part relative table Present Replace parts A4F37179(Q'ty:2) A4F38999(Q'ty:2) A4F37180(Q'ty:1) A4F38998(Q'ty:1) . while rotating a cover. 13.179 - . KONICA MINOLTA Confidential A4F37179⇔A4F38999 A4F37180⇔A4F38998 A4F37179⇔A4F38999 Attachment standard A B C A section detail view Punch mark standard Sheet metal edge standard B section detail view Punch mark standard Sheet metal edge standard C section detail view Punch mark standard Sheet metal edge standard .180 - . KONICA MINOLTA Confidential 15. Table of contents .181 - . Assembly Reinstall the preceding parts following the removal steps in reverse.