Konica Minolta AccurioPress C2070 Troubleshooting Manual
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Konica Minolta AccurioPress C2070 Troubleshooting Manual

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TROUBLESHOOTING GUIDE

2017.09
Ver.2.1
PP support div.

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Summary of Contents for Konica Minolta AccurioPress C2070

  • Page 1: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 2017.09 Ver.2.1 PP support div.

  • Page 2: Table Of Contents

    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...
  • Page 3 KONICA MINOLTA Confidential 1.3.17 TransferabilityatFeedingEmbossPaper ---------------------------------------------------------------- 83 1.3.18 Image density is lighter on uncoated paper (rough paper) --------------------------------------- 91 1.3.19 Gloss memory ----------------------------------------------------------------------------------------------- 95 1.3.20 Center of line gets broken -------------------------------------------------------------------------------- 96 1.3.21 Secondary color text scatters ---------------------------------------------------------------------------- 97 1.3.22...
  • Page 4 KONICA MINOLTA Confidential 4 Options 4.1 PF-707 4.1.1 Multi-feed of Plain Fine paper under high temperature and high humidity --------------------- 194 4.1.2 PF-707 Wrinkle on paper ----------------------------------------------------------------------------------- 195 4.1.3 PF-707 Paper skew of small size ------------------------------------------------------------------------- 197 4.1.4 PF-707 Corner fold (dog ear) and conveyance JAM of small size -------------------------------- 200 4.1.5...

  • Page 5: Cyclic White Spot/Black Spot

    KONICA MINOLTA Confidential 1.1.1. Cyclic white spot/black spot (1) Symptom White spot/black spot repeatedly occurs at a certain cycle. (2) Cause • Drum unit Approx. 188mm cycle in a single color • Developing unit Approx. 44mm cycle in a single color •...

  • Page 6: Color Spots Due To Soilage Inside Machine

    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.
  • Page 7 KONICA MINOLTA Confidential (3) Solutions 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) ●...
  • Page 8 KONICA MINOLTA Confidential Transfer belt cleaning unit Separation claw unit 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 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...
  • Page 9 KONICA MINOLTA Confidential Separation discharge plate unit Black sheet If the soilage still remains, remove the unit and conduct cleaning mentioned in the roller replacement procedure. After cleaning, make 10 sheets of blank print in A3 to clean the paper path.

  • Page 10: Color Spots (Black Spots)

    KONICA MINOLTA Confidential 1.1.3. Color spots (black spots) (1) Symptom Color spots (black spots) occurs Yellow soft clumping Magenta soft clumping Black carrier Yelllow soft cakeing For human eyes, all looks like black spots on the print. (2) Cause When the temperature is high or the internal temperature increases too much, the toner or carrier forms core.
  • Page 11 KONICA MINOLTA Confidential be improved. Toner issue (environment dependent) Check the environment and use condition of the machine • Ambient temperature (The room temperature 30 degrees C and over is not allowed.) • Whether there was a occasion that internal cooling system did not function: JAM or SC during continuous print •...

  • Page 12: White Spot Due To The Developing Leakage (Foreign Material)

    KONICA MINOLTA Confidential 1.1.4. White Spot due to the developing leakage (foreign material) (1) Symptom White spots occur on the solid image. ← 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.
  • Page 13 KONICA MINOLTA Confidential 1.1.5. White dots from 2 transfer unit (1) Symptom Many white dots in the diameter φ0.1 to 1mm occurred. (2) Cause While transferring toner from the belt to paper, the resistance difference due to the paper generates abnormal discharge on the paper at the transfer nip. At the discharge spot on the paper, the toner repels and white spots appear on print.
  • Page 14 KONICA MINOLTA Confidential 1.2.1 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.]→[Auto gamma adjustment]→ [Adjustment]→[Execute Adjustment Operation]→[Auto Gamma Adj.] * Which method you take, there is no difference in operation.
  • Page 15 KONICA MINOLTA Confidential (2) Apply countermeasure per symptom (a) There is line on image in the paper feed direction Check Test pattern No.58, which was printed in Step1-(2). Check which of the following pattern [1] to [3] they apply. Feed direction...
  • Page 16 KONICA MINOLTA Confidential (c) No line on Test pattern No.58. Line may be caused by Y. Check that the line appears in the same position on both “Test pattern No.53 in Y=120, 255” and “4 color gray test pattern” which were previously printed.

  • Page 17: White Lines (To Sub-Scan Direction)

    KONICA MINOLTA Confidential 1.2.2. 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) When the toner soils charging grid, the grid potential control becomes poor.
  • Page 18 KONICA MINOLTA Confidential • Fusing belt shifting range (about 10mm) banding (3) Solution (a) Charging caused line (drum potential problem) 1. Clean charging grid. Use the non-woven fabric (hydro-wipe 65AA-9920). 2. Clean the charging wire with the cleaning material, equipped to the machine.

  • Page 19: Gloss Line Caused By Fusing Paper Exit Roller

    KONICA MINOLTA Confidential 1.2.3. Gloss line caused by fusing paper exit roller (1) Symptom When printing the high coverage original, gloss line may occur on image. (2) Cause When paper passes through the fusing unit, the fusing paper exit roller and the paper surface contact each other, which lowers the temperature of contacting area.
  • Page 20 KONICA MINOLTA Confidential 1.2.4. 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, banding may appear at the 104mm and the 208mm from the leading edge of paper.
  • Page 21 KONICA MINOLTA Confidential (3) Solution Change DipSW1-0 to 1 to display Expert Adjustment to Paper Setting. [Service mode]→ [System Setting]→[Software DipSW Setting] In Expert Adjustment of Paper Setting, turn ON [Thick Bk mode] to ON. With this setting, even for the single Bk printing, YMC 1 transfer roller is in pressed state and that is effective to reduce vibration.
  • Page 22 KONICA MINOLTA Confidential Additionally, depending on paper, banding cannot be solved completely. If the improvement level is not enough, please request your customer to try another kind of paper. Table of contents - 21 -...

  • Page 23: Line Like Ripple On Image

    KONICA MINOLTA Confidential 1.2.5. Line like ripple on image (1) Symptom Unevenness in the main scan direction (CD) occurs on solid image with 2 (or more) colors. (2) Cause (a) High toner charge under the low humidity environment When toner charge is increased under the low humidity environment, the leak occurs at the transfer section.

  • Page 24: Waste Toner Packin

    KONICA MINOLTA Confidential 1.2.6. Waste toner packing (1) Symptom Image is soiled in paper feed direction (sub-scan direction) (2) Cause Under following condition, 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.
  • Page 25 KONICA MINOLTA Confidential 1.2.7. 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. Or, darker image after 44mm from white area (text or image) <...

  • Page 26: Lines Or Banding To The Main Scan Direction (Cd) Due To Speed Difference Between 2Nd Transfer And Fusing

    KONICA MINOLTA Confidential 1.2.8. 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). (2) Cause...
  • Page 27 KONICA MINOLTA Confidential (b) When the fusing speed is faster: Banding position varies When the fusing speed is faster, the paper is pulled against 2 transfer unit. Therefore, the banding occurs at 2 transfer section. The banding appears according to the fusing roller cycle and occurrence position on image is not constant.

  • Page 28: Image Got Blurred Affected By Ozone (Cyclic White Band)

    KONICA MINOLTA Confidential 1.2.9. Image got blurred affected by ozone (cyclic white band) (1) Symptom Cyclic white band occurs. ● Width of band : Width of charging corona (approx 18 to 20mm) ● Cycle : Drum (approx 188mm) Sub scan...

  • Page 29: Photoconductor (Drum) Memory

    KONICA MINOLTA Confidential 1.2.10. Photoconductor (Drum) memory (1) Symptom (a) The previous image appears as density difference at the 188 mm later position (drum rotation cycle). Feed 通紙方向 Direction 188mm (b) Band in CD occurs on 1st sheet. The position is up to 58mm (or 115mm) from leading edge and up to 170mm.
  • Page 30 KONICA MINOLTA Confidential (3) Solution Symptom (a) Reduce 1 transfer [Utility/Counter]→[Administrator Setting]→[System Setting]→[Expert Adjustment]→ [Process Adjustment]→[Front & Back Density] Reduce the value for 1 Transfer Y to 1 Transfer K by 5% and check the image. Gamma automatic adjustment starts when returning to the normal screen.

  • Page 31: Developing Screw Mark

    KONICA MINOLTA Confidential 1.2.11. Developing screw mark (at low speed) Machine rear side Machine rear side Rear side Whole page Feed Direction Machine front side Machine front side (1) Symptom Slant white lines in screw pitch occurs at the machine rear side, front side or whole page.
  • Page 32 KONICA MINOLTA Confidential (c) In the case that slant white lines in screw pitch occur only at the machine front side. → Pattern2 Machine rear side Feed Direction Machine front side Pattern 1 Replace developer. Note: In the case the grid in charging unit is heavily dirty by toner like following photo even if charging unit life is within PM cycle.
  • Page 33 KONICA MINOLTA Confidential Conduct Gamma Automatic Adjustment [Service mode]→[Process Adjustment]→[Drum Peculiarity Adjustment]→[Gamma Automatic Adjustment]→[Start] Back to normal screen Note When the developer conveyance speed at low speed is increased, sharp line may be easily seen. So, when changing the setting, please confirm the actual print.

  • Page 34: Lines Or Banding On Image Due To Speed Change (Shock Noise)

    KONICA MINOLTA Confidential 1.2.12. Lines or banding on image due to speed change (shock noise) (1) Symptom On the thick or the hard paper, white or color lines to CD (main scan direction) occur. Check the lines position from the following figure and specify the cause location and apply solution matching the cause.
  • Page 35 KONICA MINOLTA Confidential • C1060 (Shifting at 2nd transfer) Fusing roller contacts Fusing nipping starts Cause/Solution (a) Registration roller release High speed Middle speed Cause/Solution (b) Low speed Exit registration guide Cause/Solution (a) - 34 -...
  • Page 36 KONICA MINOLTA Confidential • C1070 (Shifting at 1 transfer) Previous sheet exit 2 transfer Cause/Solution (b) Enter to 2 transfer Cause/Solution (c) Fusing roller contact Cause/Solution (a) Fusing nipping starts Release registration roller High speed Middle speed Cause/Solution (b) Low speed...
  • Page 37 KONICA MINOLTA Confidential • C1060 (Shifting at 1st transfer) Previous sheet exit Cause/Solution (b) transfer Cause/Solution (c) Enter to 2 transfer Fusing roller contact Cause/Solution (a) Fusing nipping starts Release registration roller High speed Cause/Solution (b) Low speed - 36 -...
  • Page 38 KONICA MINOLTA Confidential • C1070 (Shifting at write unit) Previous sheet exit registration guide High/Low speed Cause /Solution (a) Middle speed Previous sheet exit 2 transfer High/Low speed Cause/Solution (b) Middle speed Enter to 2 transfer Cause/Solution (c) Fusing roller contacts...
  • Page 39 KONICA MINOLTA Confidential • C1060 (Shifting at write unit) Previous sheet exit registration guide Low speed Middle speed Cause/Solution (a) High speed Previous sheet exit 2 transfer Low speed Middle speed Cause/Solution (b) High speed Enters 2 transfer Cause /Solution (c)
  • Page 40 KONICA MINOLTA Confidential (2) Cause (a) Changes due to the paper behavior at 2 transfer When the paper enters to the fusing unit or exits from the registration guide plate and force relation at 2 transfer is changed by the paper, the shifting occurs at the 2 transfer.
  • Page 41 KONICA MINOLTA Confidential Paper speed constantly When the loop is not slows down formed enough, transfer unit and image paper speed is slowed gets blurred. down and blurred image or banding appears. Mechanism of shifting at 1 transfer Intermediate transfer belt V ｄ...
  • Page 42 KONICA MINOLTA Confidential (3) Solution (a) Lines due to the paper behavior at the 2nd transfer 1. Check 2 transfer pressing release mechanism works normally. 2. To reduce the force change at the 2 transfer, reduce the pressure. 3. Check if the fusing guide plate/front is installed normally, (bending or fitting state of guide...

  • Page 43: Developing Roller (44Mm) Cycle Banding (Different Density)

    KONICA MINOLTA Confidential 1.2.13. 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, Ds or Developer conveyance amount changes.

  • Page 44: Irregular Darker Or Lighter Density Band Appears After Leaving Machine Under High Humidity Environment

    KONICA MINOLTA Confidential 1.2.14. Irregular darker or lighter density band appears after leaving machine under high humidity environment (Green) Symptom When the machine is left under high temperature and high humidity environment for long period, darker or lighter density band occurs in 2-color solid (green). It is not cyclic bands.

  • Page 45: Jittering Lines At Trailing Edge

    KONICA MINOLTA Confidential 1.2.15. 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. Previous 前紙 sheet Feed 通紙方向 direction Trailing edge of the 310㎜...

  • Page 46: Mm Interval Fd Lines

    KONICA MINOLTA Confidential 1.2.16. 8mm interval FD lines (1) Symptom After replacing the drum unit to new one, multiple FD lines in 8mm interval occur. Feed Direction 通紙方向 8mm間隔の Multiple FD lines in 8mm interval FDスジ複数 (2) Cause Uneven transfer due to the uneven condition of the transfer belt surface.

  • Page 47: Density Change By Static Electricity

    KONICA MINOLTA Confidential 1.2.17. Density change by static electricity (1) Symptom (a) At the 40mm to 160mm from the leading edge of paper, the different density area appears in FD direction. Feed Direction 通紙方向 40～50㎜ 約160㎜ From lead edge 40 to 50 mm and approx. 160mm 用紙先端...
  • Page 48 KONICA MINOLTA Confidential 2. Adjust Separation DC current. Copy screen (Machine screen)→[Paper Setting]→[Change Set]→[Expert Adj.] Adjust Separation Current. 3. Decrease Separation DC (Front) 4. Decrease Separation AC (Front) Note Please mind that after decreasing separation current, the thin paper behavior may not be stable and wrinkle, feed failure may occur on thin paper.

  • Page 49: Fd Lines And Banding

    KONICA MINOLTA Confidential 1.2.18. 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. (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.
  • Page 50 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, how many prints or so) ...
  • Page 51 KONICA MINOLTA Confidential the DIPSW to the following settings. DIPSW103-2 : 1 DIPSW103-3 : 1 Turn the DIPSW for reverse rotation to clean clumps. Execute per 100 printing. DIPSW103-0 : 1 DIPSW103-1 : 1 Frequent reverse rotation to clean clumps can reduce the productivity.

  • Page 52: Mm Cycle Density Difference Caused By The Fusing Unit

    KONICA MINOLTA Confidential 1.2.19 5mm cycle density difference caused by the fusing unit (1) Symptom On solid image at the later half of the image, 5mm cycle density different area occurs. It is particularly visible on BK solid in LL environment with middle speed printing.

  • Page 53: Color Lines In Cd At 13Mm From The Leading Edge

    KONICA MINOLTA Confidential 1.2.20 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, the toner image scatters just before the 2 transfer nipping.
  • Page 54 KONICA MINOLTA Confidential DIPSW Setting 1.5% Toner band DipSW104-0 =0 DipSW104-0 =0 DipSW104-0 =1 DipSW104-0 =1 creation DipSW104-1 =0 DipSW104-1= 1 DipSW104-1= 0 DipSW104-1= 1 setting (Default) Color(YMCK) Note  When the intermediate transfer cleaning unit count reaches later part of the life count, cleaning failure may possibly occur.

  • Page 55: White Line Due To Separation Claw Mark

    KONICA MINOLTA Confidential 1.2.21 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. (2) Cause When the lead edge of the paper passes the 2 transfer section the 3 separation claws contacts with the intermediate transfer.

  • Page 56: Gloss Band In Cd With Margin Width

    KONICA MINOLTA Confidential 1.2.22. Gloss band in CD with margin width (1) Symptom Gloss band in CD which corresponds with the margin appears. The same The same as margin as margin sheet margin sheet margin width width 311mm 311mm 311mm (2) Cause ・Due to the effect of the wax component transferred from the fusing belt upper, the gloss...
  • Page 57 KONICA MINOLTA Confidential Tips ・Low temperature Regardless of the previous image, the gloss level is entirely low and the gloss memory is not easily seen. ・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.

  • Page 58: Image Lacks At The Corner Of The Trailing Edge (Soilage In Main Scan Direction (Cd)

    KONICA MINOLTA Confidential 1.2.23 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. At the same time, the soilage to the CD direction the same as the lacking part occurs after one cycle of the intermediate transfer belt.
  • Page 59 KONICA MINOLTA Confidential 1.3.1. Image after white part becomes darker (Developing ghost) (1) Symptom When printing solid part and white part mixed image, the density of solid part at immediately after white area looks darker. This also occurs if printing the color not included in solid part. .
  • Page 60 KONICA MINOLTA Confidential Decrease the set value of Develop AC frequency Service mode→ [Process adjustment]→[Process fine adjustment] →[Develop AC frequency] After setting, perform auto gamma adjustment. Increase the set value of Toner density fine adjustment Service mode →[Process adjustment]→[Process fine adjustment] →[Toner density fine adjustment]...

  • Page 61: Darker At The Trailing Edge Of Image

    KONICA MINOLTA Confidential 1.3.2. 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.

  • Page 62: Background Or Toner Scattering After Continuous Low Coverage

    KONICA MINOLTA Confidential 1.3.3. 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 10,000 prints or more), toner may scatter from the developing unit or background may occur.

  • Page 63: How To Maintain Consistent Color During Continuous Printing

    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.
  • Page 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.

  • Page 65: Unexpected Density Drop If "Dens. Adj. Per Paper" Set Positive (+) Value

    KONICA MINOLTA Confidential 1.3.5. Unexpected density drop if "Dens. Adj. Per Paper" set positive (+) value (1) Symptom If printing continuously in high coverage image with setting "Dens. Adj. Per Paper" to positive (+) value, there are potential of unexpected density drop as following. Around 10 prints from start, print image density starts decreasing to the extent it is not visible.
  • Page 66 KONICA MINOLTA Confidential Print No.43 chart to confirm the result whether the image density recovers or not. If the result is good, go to step 5 to prevent recurrence of the problem. If the print image density does not recover after step 2, perform [Toner Density Revert].

  • Page 67: Small Blank Area Or Color Registration Error

    KONICA MINOLTA Confidential 1.3.6. 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 2 transfer unit.
  • Page 68 KONICA MINOLTA Confidential If the improvement level is not enough, please request customer to try another paper type. Table of contents - 67 -...

  • Page 69: Too High Gloss

    KONICA MINOLTA Confidential 1.3.7. Too high gloss (1) Symptom Gloss is too high. (2) Cause Fusing temperature setting is higher for the paper. (3) Solution 1. Show Expert adjustment in Paper Setting. Change DipSW 1-0 from 0 (Default) to 1.
  • Page 70 KONICA MINOLTA Confidential Caution When [Up fusing Initial Temp.] is changed, "fusing failure" (Toner is peeled off because fusing temperature is not enough) may occur. 3. Decrease Upper Fusing Roller Temperature for respective trays. [Machine]→ [Paper Setting]→ [Change Set]→ [Expert Adj.]→[Upper Fusing Roller Temperature] As the first step, change temperature by 10 °C then gradually decrease (Max 20 °C)

  • Page 71: Rough Image On The 1St Side Of Duplex

    KONICA MINOLTA Confidential 1.3.8. Rough image on the 1st side of duplex (1) Symptom The image on the 1st side of duplex print gets rough and not glossy, (2) Cause (a) When Mix mode or changing a tray, Temperature of lower roller surface is too high.

  • Page 72: White Or Color Banding At Thick Paper Leading And Trailing Edges

    KONICA MINOLTA Confidential 1.3.9. White or color banding at thick paper leading and trailing edges (1) Symptom On thick paper, white or color banding appears at 5 to 10mm from leading edge and 20mm from trailing edge. Feed direction 10mm from leading edge...
  • Page 73 KONICA MINOLTA Confidential (d) Change paper grain direction The symptom is improved when the paper grain is vertical to the feed direction. (For example, long grain for A3 paper.) (e) Leading edge and trailing edge erase Change DipSW1-0 from 0 (Default) to 1, to show expert adjustment on paper settings.

  • Page 74: C-2451, C-2452, C-2453 Or C-2454, Low Toner Density

    KONICA MINOLTA Confidential 1.3.10. C-2451, C-2452, C-2453 or C-2454, Low toner density (1) Symptom Just after developing unit replacement, C-2451, C-2452, C-2453 or C-2454 (toner density abnormal) occurs. (2) Cause The orange tape is still attached to toner supply inlet of the respective unit.

  • Page 75: Poor Transfer At Image Front

    KONICA MINOLTA Confidential 1.3.11. Poor transfer at image front (1) Symptom When the periodic cleaning of the 2 transfer unit is not enough, poor transfer may occur at the entire area of the machine front side image. Front side image gets lighter;...
  • Page 76 KONICA MINOLTA Confidential Rear Front 前 後 A50U5209 A50U5209 押圧蓋 Pressing cover Pressure 押圧摺動 sliding part Surrunding 摺動部周 area Table of contents - 75 -...

  • Page 77: Prevention Of The Backside Soilage

    KONICA MINOLTA Confidential 1.3.12. Prevention of the backside soilage (1) Symptom The backside of the paper gets soiled (includes 75mm cycle, the 1 one is at less than 75mm) (2) Cause The patch created between images in image stability priority mode attaches to the 2 transfer roller.

  • Page 78: Fainted Outline, Darker At Edge

    KONICA MINOLTA Confidential 1.3.13. Fainted outline, darker at edge (1) Symptom On halftone image, the outline of the paper leading edge side gets fainted (fainted outline) and the trailing edge side outline gets darker. (2) Cause The symptom which occurs due to the reverse rotation direction between developing roller and drum rotation direction is in counter.
  • Page 79 KONICA MINOLTA Confidential 1.3.14. Image background under high temperature (1) Symptom During continuous print on coated paper under high temperature environment, image background occurs. The symptom particularly occurs when the temperature is 25 ºC and over, Bk mode/High coverage (25% and over)

  • Page 80: Backside Image Soilage

    KONICA MINOLTA Confidential 1.3.15 Backside image soilage (1) Symptom At duplex print, the 2 side may get soiled at machine front and rear. (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.
  • Page 81 KONICA MINOLTA Confidential Dusts Bottom plates (3) Solution Clean the above points and ADU. Table of contents - 80 -...

  • Page 82: Toner Is Not Cleaned At The Edge Of The Transfer Belt

    KONICA MINOLTA Confidential 1.3.16. Toner is not cleaned at the edge of the transfer belt (1) Symptom During machine setup, the toner cleaning failure occurs at the edge of the intermediate transfer belt. Toner pass through the edge of the blade...
  • Page 83 KONICA MINOLTA Confidential Space is created between belt and blade Release 2. Press the cushion material to prevent interference. → Press the cushion material to the arrowed direction to change form. Note Be careful not to remove the cushion material.
  • Page 84 KONICA MINOLTA Confidential 1.3.17. Transferability on embossed paper (1) Symptom In using embossed paper (bumpy paper), toner density of concave parts gets thin because toner cannot transfer on concave parts. Transfer belt M toner C toner Paper surface Major embossed paper ...
  • Page 85 KONICA MINOLTA Confidential High Decrease productivity Recommend Embossed paper setting High effect Based on [4] or [5] Toner refresh mode Increase toner Temporary solution (Just consumption temporary) Adjust based on [4. Embossed paper profiles]. 1. <Service man setting> At first, adjust the machine to be the best condition for embossed paper.
  • Page 86 KONICA MINOLTA Confidential Fus. Roller Density Per Transfer Temp. Tray Output Adj. Rear Edge Transfer Upper Lower (YMC) (Front) (Front) Pressure Default Auto Light-structured paper with normal Normal level Light-structured paper with Normal increase toner Deep-structured paper with normal Normal...
  • Page 87 KONICA MINOLTA Confidential Note  Recommended setting is 3%.  When set to 3%_5% Switching, it workes 5% only [Unevenness Setting] is ON.  When DipSW 102-6,102-7 are set, the 2nd transfer unit pressure release setting is set along with them.
  • Page 88 KONICA MINOLTA Confidential Replace 2nd transfer pressure spring with new type of the strong 2nd transfer pressure spring (A85C5262**) and set DipSW. DipSW 105-7 =1(ON) 2nd transfer pressure spring  2nd transfer pressure spring replacement procedure Push aslant and release claws one by one.
  • Page 89 KONICA MINOLTA Confidential When the Embossed paper setting does not need display, Set the DipSW. DipSW 93-0 =1(ON) Display Embossed paper setting <Customer workflow> Conduct before printing embossed paper. Execute toner refresh mode 2 times. Replace toner in the developing unit by performing the toner refresh mode.
  • Page 90 KONICA MINOLTA Confidential Embossed paper setting (Select [Plane] paper type) 2nd Transfer Fus. Roller Density Per Temp. Tray Line speed 2nd Transfer Output Adj. Rear Edge (Front) Upper Lower (YMC) Pressure (Front) Auto Auto (Plane = Low) Auto Normal (Down 1...
  • Page 91 KONICA MINOLTA Confidential Note  When set both [Paper Profile] and [Embossed Paper Setting], [2nd Transfer Pressure] and [2nd Transfer Output] are reset once before switching the other setting. [Fusing Roller Temperature], [Density Per Tray] and [Line Speed] are added before setting.
  • Page 92 KONICA MINOLTA Confidential 1.3.18. Image density is lighter on uncoated paper (unsmooth paper) (1) Symptom Image density gets lighter on unsmooth paper. Symptom tends to occur especially when the paper surface is rough. Some of uncoated paper is categorized as unsmooth paper and some are categorized as embossed paper.
  • Page 93 KONICA MINOLTA Confidential ・Coated paper High gloss toner (C1070/C2070) Before melting After melting Melting toner is not absorbed to paper's fiber and Coated white background does not remain. ・Uncoated paper High gloss toner (C1070/C2070) Light makes regular reflection on toner's surface and changes its angle on paper's rough surface, which appears as unevenness.
  • Page 94 KONICA MINOLTA Confidential Note  Fusing failure and line like ripple may occur.  If the "Den. Adj. per Tray" set "+1" or more, Color is changed. But the effect is high for increasing density. - 93 -...
  • Page 95 KONICA MINOLTA Confidential  When the button of "Evenness +1" is selected, fusing failure (such as poor fusing or toner is peeled off because fusing temperature is not enough) may occur.  When the rough paper solution is not effective, the used paper is categorized as embossed paper.

  • Page 96: Gloss Memory

    KONICA MINOLTA Confidential 1.3.19. Gloss memory (1) Symptom The gloss is partly different. It corresponds with the image pattern. (Gloss is higher where the toner was at the previous cycle). (2) Cause Due to the effect of the wax component which was transferred to the fusing upper belt, the difference of the gloss corresponding to the image appears at fusing upper belt cycle (approx 311mm ) (Gloss memory).

  • Page 97: Center Of Line Gets Broken

    KONICA MINOLTA Confidential 1.3.20. Center of line gets broken (1) Symptom When the very smooth surface paper is used, the thin line gets broken at the middle. It tends to occur especially on OHP sheet. (2) Cause The toner image aggregates at the 2 transfer unit and only the edge part is transferred well and the center part is not transferred to the text.

  • Page 98: Secondary Color Text Scatters

    KONICA MINOLTA Confidential 1.3.21 Secondary color text scatters (1) Symptom Red, blue and green texts look like blurred. (2) Cause For the dark red, blue and green texts and so on are the secondary color and the toner attaching amount reaches near 200% which is too much.
  • Page 99 KONICA MINOLTA Confidential (b) IC-308/IC-415 Access [Image] tab, and check [Color text blur prevention] at [Edge enhancement] At the Apply enchantments to; select [Text/graphics]. Note When the Color text blur prevention is enabled, comparing with the disabled, the blur at dark red, blue, green and shadow is improved.

  • Page 100: Image Offset Caused By Fusing Unit

    KONICA MINOLTA Confidential 1.3.22. Image offset caused by fusing unit (1) Symptom Different types of offset exists and in many cases, it is difficult to identify the cause from the image. Therefore, trying some change of key parameter for the issue may be the quickest way to solve the issue rather than identify the cause.
  • Page 101 KONICA MINOLTA Confidential effect is not generated between the paper fiber and the toner. Consequently, the toner is separated from the paper and attaches to the fusing belt. (d) Static electricity noise When the paper is discharged too much, the electrostatic absorption power between paper and toner is reduced.
  • Page 102 KONICA MINOLTA Confidential When the conduction is not seen, • Clean the following part with the drum cleaner. Red circled part • Check the contact status of the spring material. If it is not enough, increase the pressure. Blue circled part...
  • Page 103 KONICA MINOLTA Confidential Claw of spring Solution Filing the joint of neutralization ring, and remove the burr. The burr is likely to shave the claw of spring. Bring the joint of neutralization ring into contact with claw of the spring.
  • Page 104 KONICA MINOLTA Confidential Noise given by the electrostatic 1. Change the DipSW 1-0 (To show expert adjustment) 0 (Default) to 1. 2. Access [Machine]→[Paper Setting]→[Change Set]→[Expert Adj] And adjust separation current Increase [Separation DC (Front)] Note When the Separation DC is increased, following symptom may occur depending on the paper type.
  • Page 105 KONICA MINOLTA Confidential Decrease fusing temperature [Machine]→[Paper Setting]→[Change Set]→[Expert Adj.] →[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. When the cause is the high fusing temperature offset, the decrease of the temperature is very effective.

  • Page 106: Toner Band Control Setting

    KONICA MINOLTA Confidential 1.3.23. Toner band control setting (1) Symptom Image failure like following occurs: FD line (cleaning failure, white line), Background, Toner scattering, color change, poor transfer and so on. Screw mark FD lines (Cleaning failure) FD lines (White lines)
  • Page 107 KONICA MINOLTA Confidential Background (Enlarged view) Blank space Poor transfer (Embossed paper and so on) Toner spilling (2) Cause During long-run low coverage print, developer may get deteriorated or lubricant may be provided too much to the transfer cleaning blade. And when print alternately low coverage and high coverage, too much toner scatters causing image background and contamination inside machine.
  • Page 108 KONICA MINOLTA Confidential roller. The soilage on the 2nd transfer roller may transfer to the 2nd side of the paper and appears on the image. To prevent it, when the band control is enabled, release the 2nd transfer pressure. Execute Toner Refresh Mode [Administrator Settin]→[System Setting]→[Expert Adjustment]→[Execute Adjust...

  • Page 109: On The 2Nd Side Of The Small Size Thick Paper (Ex. Postcard), Uneven Color Occurs

    KONICA MINOLTA Confidential 1.3.24. On the 2nd side of the small size thick paper (ex. Postcard), Uneven color occurs (1) Symptom When the 2nd side of the small size thick paper (ex. Postcard) is printed, uneven density occurs on 2 or more color mixed part.
  • Page 110 KONICA MINOLTA Confidential (3) Solution Change DipSW1-0 to 1 to display Expert Adjustment to Paper Setting. [Service mode]→[System Setting]→[Software DipSW Setting] [Machine]→[Paper Setting]→[Expert Adj.]→[2nd Transfer Output Adj.(Front)/(Back)] Set to -10 steps (Minus direction). If it is not improved, set every -5 steps till the symptom is improved.
  • Page 111 KONICA MINOLTA Confidential 1.4.1. Darker/Lighter image density and background (CSRA approach) (1) Symptom Image density is entirely darker /lighter or background occurs. (2) Cause There are plural probable causes. List up the probable causes using the CSRA. (3) Solution The CSRA determines the entire state of a machine from the acquired data then displays a list of the probable causes with the solution in the order of higher probability on the PC or mobile screen.
  • Page 112 KONICA MINOLTA Confidential PC View Mobile View 3. Select [Troubleshooting] button. PC View Mobile View 4. Select [Sales Office], [Model], [S/No] and [Period] in search items. And press [Apply]. PC View Mobile View - 111 -...
  • Page 113 KONICA MINOLTA Confidential 5. After checking the date time of the search results, select the trouble that applies from the drop- down list of [Symptom] for troubleshoot and press [Apply]. PC View Mobile View 6. Perform the procedure in the displayed order. (Cause, problem location and solution are displayed in the order of a higher probability.)
  • Page 114 KONICA MINOLTA Confidential 7. Record the result of the tried solution. ・Select the result from the drop-down list of [Interaction Item] below. ・Describe the detail of the solution you applied in the [Description] area. ・After entering, press [Register]. PC View...
  • Page 115 KONICA MINOLTA Confidential 2.1.1. Paper waving (1) Symptom The edge of the paper becomes wavy. (2) Cause (a) Paper shrinkage rate The paper shrinks rate at the fusing unit is different between the center and edges of the paper. ( Go to Solution(a) )

  • Page 116: Setting For Ohp Sheet Printing

    KONICA MINOLTA Confidential 2.1.2. Setting for OHP sheet printing f (1) Symptom When printing OHP, off-centering by 5mm, J-3101 or fusing wrapping jam occurs. (2) Cause (a) Off-centering by 5mm Since OHP is transparent, centering sensor mis-detects the sheet position. Consequently, the registration roller moves the maximum distance (5mm).

  • Page 117: Trailing Edge Skews

    KONICA MINOLTA Confidential 2.1.3. Trailing edge skews (1) Symptom Trailing edge skew occurs on the side2 of the duplex printing. Depending on the environment, if the paper in the tray curls, the trailing edge skews also on side 1. (2) Cause When the paper curl level is different between the lead edge and the trailing edge, the paper enters to the fusing unit unstably.

  • Page 118: Printed Paper Curls (Without Ru Connection)

    KONICA MINOLTA Confidential 2.1.4. 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. Decurl adjustment condition is already optimized for the paper type (plain / fine /Coated <GL, GO, ML, MO>).
  • Page 119 KONICA MINOLTA Confidential • Convex curl • Concave curl ← : Paper exit direction 1 side Both side Face up Face down Curl Convex Concave Convex Concave Concave Convex direction Curl Curl Curl Curl Curl Curl Setting +1 (0) +1 (0) (b) Fusing temperature adjustment Depress paper curl by reducing upper fusing roller temperature.

  • Page 120: Fusing Wrapping Jam

    KONICA MINOLTA Confidential 2.1.5. Fusing wrapping jam wra (1) Symptom When printing the following type of image on the thin paper, fusing wrapping jam occurs. a. Less margin at the leading edge. b. Test pattern No. 53 with 2-color solid (2) Cause When the toner attaching amount at the leading edge is much, separation fails.
  • Page 121 KONICA MINOLTA Confidential 2. Press the [Change Setting] and check that [Expert Adj.] is shown. If it is not shown, access service mode and change the DIPSW1-0 to 1. (To show paper setting) and restart from step 1. 3. Press [Expert Adj.] and press [Next] twice to show [Toner Amount Save] setting.
  • Page 122 KONICA MINOLTA Confidential 5. Press [OK] twice to exit individual paper setting. On the Paper Setting, confirm that the [Toner Amount Save] is set to ON for the desired tray. Then print the image. Notes · When the Toner Amount Save control is set to ON, the following image reproduction may be slightly get poorer comparing with the OFF setting;...

  • Page 123: No Feed Jam (J-1101/J-1201)

    KONICA MINOLTA Confidential 2.1.6. 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. (2) Cause (a) Paper Corner of the paper is fold (dog year), wrinkle, glue attachment, static electricity, bur is on the paper.
  • Page 124 KONICA MINOLTA Confidential Loosen the knob of the screw, move the side plates then tighten again. (c) Roller Clean the roller to remove paper dust and any soilage or replace it. (d) Add P1 load When the paper stops at paper pick up roller or paper does not reach to the feed roller,...
  • Page 125 KONICA MINOLTA Confidential the paper feed tray/1 and the paper feed tray2) If the symptom does not improve by "strong" setting, replacement of the spring to the one used for C8000 (56AA4042, multi-feed preventing spring) may be effective. Note When the load of P1/P2 is increased, the multi-feed may increase depending on the paper.

  • Page 126: Dents On Paper At 48Mm Cycle In Fd

    KONICA MINOLTA Confidential 2.1.7. Dents on paper at 48mm cycle in FD (1) Symptom On the print, dent is seen every 48mm cycle in sub-scan direction (FD). (2) Cause The toner accumulated on the fusing separation claws drops and attaches to the fusing paper exit roller.
  • Page 127 KONICA MINOLTA Confidential Clean the fusing separation claw Pull out the ADU mount and open the reverse section. Open the side paper exit plate of the fusing unit and clean the paper contacting side of the separation claw, roller surface with the cleaning pad and drum cleaner for all 5 claws...

  • Page 128: Centering Error (±5 Mm Or More)

    KONICA MINOLTA Confidential 2.1.8. Centering error (±5 mm or more) (1) Symptom Image centering error by 5mm or over occurs. (2) Cause The cause could be on the registration unit on the main body (C1060/1070 series) or PFU (PF-707/602m) .
  • Page 129 KONICA MINOLTA Confidential (5) How to clean /replace centering sensor 1. Remove screw [1] x 3pcs and the cover for the centering sensor [2]. 2. Lifting up the centering sensors [3] and the holder [4]. Centering sensor 3. Clean the centering sensor 4.
  • Page 130 KONICA MINOLTA Confidential Flow of the work Note: The sensor in the below flow means centering sensor. Centering error (over ± 5mm) Paper size setting is correct and paper is set to the tray correctly. Set the paper size setting...

  • Page 131: Paper Stick With Each Other Due To Static Electricity

    KONICA MINOLTA Confidential 2.1.9. Paper stick with each other due to static electricity (1) Symptom When the printed paper stacked on the output tray, the paper gets static electricity and following symptom occurs. The symptom tends to occur when a high coverage job is printed duplex on the coated paper (surface smooth paper) or uncoated paper.
  • Page 132 KONICA MINOLTA Confidential Load the large size such as A3 and 11x17 to the tray. In [Print Mode], select [1→2] and [Full Color]. - 131 -...
  • Page 133 KONICA MINOLTA Confidential From [Paper Setting], select the tray and access to the [Output Paper Separation Setting] in the Expert Adjustment [Paper Setting]→[Tray]→[Change Setting]→[Expert Adjustment]→ [Output Paper Separation Setting] Change [Offset Value] to the following and print 20 sheets on large size such as A3 or 11x17.
  • Page 134 KONICA MINOLTA Confidential To use humidifer for other paper type and weight, change the DIPSW49-4 from "0" to "1"(ON) to release the prohibition. [Service mode]→[System Setting]→[Software DIPSW Setting] DIPSW49-4 Contents Prohibited (Default) Release prohibition Note • When the humidifier is set to ON for the 135 g/m2 or less color paper and coated paper, conveyance roller wrapping jam may occur due to the remained moisture on the surface of paper.

  • Page 135: Static Sticking In Options

    KONICA MINOLTA Confidential 2.1.10. Static Sticking in Options (1) Symptom When you use the function of Options, you have encountered Mis-align output/Misalign folding/Mis-alignment as bellow. (a) Mis-align output (b) Misalign folding Misalign folding position Correct folding position Stapling position - 134 -...
  • Page 136 KONICA MINOLTA Confidential (c) Folding error with Misalignment Correct folding position Stapling position (2) Cause (a) The Anti-Static Performance is reduced by modification brush. - The current machine correspond to the problem that paper edge become dirty. By the side-effect of this correspondence, Anti-Static performance has reduced.
  • Page 137 KONICA MINOLTA Confidential 3. Please confirm the Anti-Static Brush type as bellow before exchanging. Brush type The detail of brush Necessity of exchanging Thunder-ron Need to exchange Brush SUS Brush Need not to exchange Correspondence for each options -The Target model are as bellow.

  • Page 138: Paper Removing Procedure On Fusing Wrap Up Jam

    KONICA MINOLTA Confidential 2.1.11. Paper removing procedure on fusing wrap up JAM (1) Symptom Fusing wrap up JAM is indicated J31-02 or J31-06. +J31-02 : Paper wrap up its lead edge. (No entrance JAM is indicated same code.) +J31-06 : Paper wrap up its middle.
  • Page 139 KONICA MINOLTA Confidential Short length papers may not be seen easily. Please find carefully especially behind of upper plate. (2) Solution Procedure 1. Turn the knob M5 to clock wise carefully. →Paper can be appeared. (Please pay attention for toner dirty around fixing unit especially to remove long length papers.) 2.
  • Page 140 KONICA MINOLTA Confidential (b) For short length paper that trail edge is not seen. Turn the knob M5 to clock wise until lead edge can be seen. ・ 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.
  • Page 141 KONICA MINOLTA Confidential 2.1.12 J-3102, Thin paper feed failure at the 2 transfer unit (1) Symptom When the J-3102 occurs, the paper stops between the fusing unit and the 2 transfer unit. (2) Cause (a) The leading edge of paper is not separated and wraps the intermediate transfer belt (Fig 1,...
  • Page 142 KONICA MINOLTA Confidential Direction (b) Change paper condition Dehumidify the paper or set the paper upside down in the paper cassette. Adjust the discharge needle position Remove the separate discharging plate unit. Remove the position adjustment pings set inside of the both sides of 2 transfer unit.
  • Page 143 KONICA MINOLTA Confidential Feed Direction Indication: Joint part with intermediate transfer unit Discharge needle position adjustment Remove pin transfer roller Fig. 3: The needle adjustment mechanism (Machine rear) Feed Direction Upper: For cause (a) Lower: for cause (b) Fig.4: The needle adjustment mechanism (Machine rear) adjustment direction...

  • Page 144: Paper Wrinkle At Duplex Printing

    KONICA MINOLTA Confidential 2.1.13 Paper wrinkle at duplex printing (1) Symptom Paper wrinkle occurs during duplex printing. (2) Cause Depending on the paper type and moisture in the paper, the curl becomes larger after printing on the 1 side. Consequently, the paper lead edge of the 2 side cannot enter to the fusing unit stably and wrinkle occurs.

  • Page 145: J-3201 Paper Is Caught By The Fusing Separation Claw

    KONICA MINOLTA Confidential 2.1.14 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. (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.

  • Page 146: Corner Folding At The Paper Leading Edge, Machine Front Side

    KONICA MINOLTA Confidential 2.1.15 Corner folding at the paper leading edge, machine front side (1) Symptom When printing on thin small size paper, corner folding at machine front side may occur. Example of condition: uncoated paper, less than 100gsm paper and A6 size.
  • Page 147 KONICA MINOLTA Confidential Actuator lifts up the edge of the not Downstream stiff and narrow width paper. 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 •...

  • Page 148: Leading Edge Does Not Looks Nice (Hitting Mark Like Peeling)

    KONICA MINOLTA Confidential 2.1.16. Leading edge does not looks nice (hitting mark like peeling) (1) Symptom The hitting mark like peeling occurs at the leading edge of thick paper. ・Leading edge is peeled to downward when the paper reaches to the registration part.

  • Page 149: Sra4S Corner Folding At The Paper Trailing Edge, Machine Rear Side

    KONICA MINOLTA Confidential 2.1.17. SRA4S Corner folding at the paper trailing edge, machine rear side (1) Symptom When both side printing on SRA4S size paper, corner folding at machine rear may occur. Folding direction: Downside folding Curl direction and Corner folding Decurler setting: Low Automatic setting: Mid.

  • Page 150: Pickup Jam Clearance Workflow

    KONICA MINOLTA Confidential 2.1.18. Pickup jam clearance workflow Introduction Paper status in the tray largely affects paper feed ability such as JAM and skew. From the experience, incorrect paper setting in the tray is one of the major factors causing JAM.
  • Page 151 KONICA MINOLTA Confidential iv） Adjust the gaps between the paper and the side guides referring to the following steps 1 through 4. Note: • Especially, to keep slight gap mentioned in 2 is important. Otherwise, JAM (non suction, multi-feed, buckling) occurs.
  • Page 152 KONICA MINOLTA Confidential Note: Example of NG state If the gap is not enough, paper is caught by side guides 2 Gap between paper and guides: 0.1 to 0.2mm. 4 Slide the paper to arrowed direction and confirm smooth movement.
  • Page 153 KONICA MINOLTA Confidential Matrix to decide jam clearance When a jam occurs, take actions in order of following steps. Check the jam code ii) Check the paper status in the tray and whether the paper is set properly referring to “1. How to set paper correctly to the tray”.
  • Page 154 KONICA MINOLTA Confidential Supplement: Details for paper status (Step 2) B. Chain feed A. Not suctioned E. Conveyance failure F. No feed D. Multi-feed When the tray is pulled out, all When the tray is pulled out, the the paper stays bottom of the leading edge of the paper stops tray.
  • Page 155 KONICA MINOLTA Confidential Actions to solve jam 3.1 Before starting adjustment i） How to change air blow condition setting ・Adjust the air level from paper setting Press [Paper Setting]→[Tray*]→[Change Set]→[Air Assist] to access air level setting screen ii） How to check paper status Check through the small window which is standard equipment and at the top left of the PFU tray.
  • Page 156 KONICA MINOLTA Confidential a)-2 Insufficient floating Example of insufficient floating The sheet slightly delayed to float <Check points> • Check the paper floating conditions <Countermeasure> • Set [Side Air Level Setting] stronger. • For paperweight 176g/m2 or lighter paper <Procedure>...
  • Page 157 KONICA MINOLTA Confidential * When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [Before locking side guide] [After locking side guide] <Countermeasure 3> ・ Remove the flap of the side guide * For 177g/m2 or heavier paper <Procedure>...
  • Page 158 KONICA MINOLTA Confidential iii) Move the upper limit detection position upward Lever at upper position Air hit the lead edge Lever at normal position * When the lever is set at upper position, sheets of paper before separation ascends. → The lead edge air separate the sheets more effectively.
  • Page 159 KONICA MINOLTA Confidential b)-2 Too many sheets are floating • Sheets of paper are floating without separation. • When the belt starts to feed, the next sheet enters to the paper path without being separated. <Countermeasure-1> • Set [Side Air Level Setting]: weaker <Procedure>...
  • Page 160 KONICA MINOLTA Confidential <Procedure> Change the air assist setting for the tray to [Manual] Set [Lead Edge Air Setting] weaker by1 level Push up the upper limit detection position change lever Upper position Lead edge air hits the sheets Normal position * When the lever is set at upper position, sheets of paper before separation ascends.
  • Page 161 KONICA MINOLTA Confidential <Countermeasure 3 > For the size not using the auxiliary guide (140mm and more width) paper ・Lock the side guide ・Set [Side Air Level Setting] weaker *If the Not suctioned JAM occur after setting the [Lead Edge Air Level Setting] weaker, Move the upper limitation detection position upward.
  • Page 162 KONICA MINOLTA Confidential <Countermeasure 5> When paper is curly, change the set direction as following image. If the set direction cannot be changed, set paper after reducing the curl. (Ideal is completely flat condition.) Feed direction Feed direction c) Buckling c)-1 Lead edge gets ∩-shape curl during floating...
  • Page 163 KONICA MINOLTA Confidential i) Change the air assist setting for the tray to [Manual] ii) Change [Lead Edge Air Level Setting] by every 1 step. - 162 -...
  • Page 164 KONICA MINOLTA Confidential d) Multi-feed <Symptom 1> JAM sheets (at horizontal conveyance section) are overlapping and the leading edge of the 1 sheet is at the downstream against that of the 2 sheet. Fig. Multi-feed JAM paper at horizontal conveyance (1...
  • Page 165 KONICA MINOLTA Confidential <Symptom 4> More than 2 sheets of the papers stop at the feed roller section Fig. Multi-feed (2 sheets or more) feed section JAM paper state d)-1 Humidity is high <Countermeasure> Turn ON heater (Installation of HT-506 is necessary) * Especially for coated paper and smooth surface plain paper d)-2 In case of the Symptom 1 and Symptom 4.
  • Page 166 KONICA MINOLTA Confidential <Procedure> i) Move the upper limitation position upward. Lever at upper position Lead edge air hits the sheets Lever at normal position * When the lever is set at upper position, sheets of paper before separation ascends.
  • Page 167 KONICA MINOLTA Confidential * When the guide is locked, the duct opening is narrowed → Separate air speed increase and paper separation performance is enhanced [After locking side guide] [Before locking side guide] ii) Change the air assist setting for the tray to [Manual] iii) Set [Lead Edge Air Level Setting] weaker by every 1 step <Countermeasure 4>...
  • Page 168 KONICA MINOLTA Confidential <Countermeasure 5> When paper is curly, change the set direction as following image. If the set direction cannot be changed, set paper after reducing the curl. (Ideal is completely flat condition.) Feed direction d)-3 For Symptom 2...
  • Page 169 KONICA MINOLTA Confidential *By locking, the duct opening is narrowed →Separate air speed increase and paper separation performance is enhanced * By locking only front side, minimize the increase of friction d)-4 Symptom 3 case Sheets floating state at symptom 3 sheet is send back to the upstream and sticking <Countermeasure 1>...
  • Page 170 KONICA MINOLTA Confidential e) Conveyance failure e)-1 Leading edge gets ∩-shape curl Leading edge gets ∩-shape curl Floating sheets are declining: Leading edge of the floating sheets is lower than others <Check points> • Check the paper curl direction in the tray <Countermearue-1>...
  • Page 171 KONICA MINOLTA Confidential <Check point> • Check the paper curl direction in the tray <Countermeasure-1> • Set the paper upside down <Countermeasure-2 (When countermeasure 1 is not enough) > • Lead edge air level: Set weaker <Procedure> i) Change the air assist setting for the tray to [Manual] ii) Set the [Lead Edge Air Level Setting] weaker by 1 step.
  • Page 172 KONICA MINOLTA Confidential 2.2.1. J-16xx (CSRA approach) (1) Symptom J-16xx occurs. (2) Cause There are plural probable causes. List up the probable causes using the CSRA. (3) Solution The CSRA determines the entire state of a machine from the acquired data then displays a list of the probable causes with the solution in the order of higher probability on the PC or mobile screen.
  • Page 173 KONICA MINOLTA Confidential PC View Mobile View 3. Select [Troubleshooting] button. PC View Mobile View 4. Select [Sales Office], [Model], [S/No] and [Period] in search items. And press [Apply]. PC View Mobile View - 172 -...
  • Page 174 KONICA MINOLTA Confidential 5. After checking the date time of the search results, select the trouble that applies from the drop- down list of [Symptom] for troubleshoot and press [Apply]. PC View Mobile View 6. Check the machine status from top priority items indicated by an arrow and select the applicable state from the drop-down list at the right side.
  • Page 175 KONICA MINOLTA Confidential PC View Mobile View 8. Record the result of the tried solution ・Select the result from the drop-down list of [Interaction Item] below. ・Describe the detail of the measure you applied in the [Description] area. ・After entering, press [Register].

  • Page 176: Highlight Automatic Adjustment Does Not Complete Normally After Trying Several Times

    KONICA MINOLTA Confidential 3.1.1. Highlight automatic adjustment does not complete normally after trying several times (1) Symptom Though performing Highlight automatic adjustment, it does not success: Service mode [Machine Adjustment] → [Quality Adjustment] → [Gamma Curve Adjustment] → [Highlight Automatic Adj.].

  • Page 177: Print Job Is Not Accepted While Machine Indicates Dehumidifying

    KONICA MINOLTA Confidential 3.1.2. Print job is not accepted while machine indicates dehumidifying (1) Symptom The machine indicates dehumidifying and print job is not accepted for a while. Optional HT-503(PF602m)/HT-506(PF707) is equipped. (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), printing is not accepted until the sensor in the tray detects certain temperature with the default setting.
  • Page 178 KONICA MINOLTA Confidential 3.2.1. C-2451, C-2452, C-2453 and C-2454 occur (1) Symptom C-2451, C-2452, C-2453, C-2454 or carrier attachment may occur when performing the Toner Density Sensor Init adjustment at developer replacement and machine setup. (2) Cause The charging corona unit is not installed correctly.

  • Page 179: C-3102 Adu Wiring Connector Is Disconnected

    KONICA MINOLTA Confidential 3.2.2. C-3102 ADU wiring connector is disconnected (1) Symptom C-3102 occurs because a connector for ADU wiring (A50UN155/N156) is disconnected. (2) Cause By repeating the pulling out and pushing back the ADU mount, A50UN188 may get tensed too much and is caught by the connector for the A50UN155/N156 wirings.
  • Page 180 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, move the wirings to the arrow indicated direction. When moving the wirings, intermediate conveyance guide plate should be removed.
  • Page 181 KONICA MINOLTA Confidential Table of contents - 180 -...

  • Page 182: C-2455,C-2456､C-2457,C-2458 Toner Density Abnormality (High Density) Occur

    KONICA MINOLTA Confidential 3.2.3. C2455/C2456/C2457/C2458 Toner density abnormality (High density) occur (1) Symptom C-CodeC2455(Y)/C2456(M)/C2457(C)/C2458(K)（Toner high density abnormality） occur. (2) Cause  During long-run low coverage print, Toner charge is deteriorated due to lubricant attached to toner. Developer level became deteriorated due to Toner charge deterioration and Toner density sensor judges low after that Toner supplied.
  • Page 183 KONICA MINOLTA Confidential 3.3.1. Options cannot be recognized. 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, the control board of the option unit may be damaged. If this occurs the operation panel displays the system configuration without the faulty option.

  • Page 184: How To Eject Developer

    KONICA MINOLTA Confidential 3.3.2. How to eject developer (1) Outline When the developing unit caused image failure occurs, eject the developer using the developer charger, referring to the following procedure. Developer charger (coupling D)：A50U3436 Input (2) Procedure Remove 2 screws and release the claws (4 positions) on cover Disconnect the connector and hook the wirings to the gear cover.
  • Page 185 KONICA MINOLTA Confidential photo, to drop the developer attaches to the developing roller and around inside the unit. Repeat the step 3. (Never rotate counterclockwise direction.) (3) Other use example Screwdriver can be connected with the developer ejection jig for easier rotation.

  • Page 186: Image Shift

    KONICA MINOLTA Confidential 3.3.3. Image shift (1) Symptom Image is off-centered by 5mm to machine front direction. Timing, vertical zoom is extremely out of alignment. (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.
  • Page 187 KONICA MINOLTA Confidential Table of contents - 186 -...

  • Page 188: Note For The Developing Shutter Installation Work

    KONICA MINOLTA Confidential 3.3.4. 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. If it is not installed correctly, the shutter does not close completely and the toner may spill. Make sure to install correctly and check it slides smoothly.
  • Page 189 KONICA MINOLTA Confidential 4. Tilt the shutter aslant then gently press down the seal on the shutter. seal 5. Return the shutter to horizontal position. Insert the shutter while pressing the spring by the prolusion of the shutter. 6. Open and close the shutter 5 times and check if it slides smoothly.

  • Page 190: Productivity Decrease At First In The Morning Under Low Temperature, Low Humidity

    KONICA MINOLTA Confidential 3.3.5. Productivity decrease at first in the morning under low temperature, low humidity (1) Symptom Productivity decreases first in the morning under low temperature and humidity. (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 2 transfer section is not available.

  • Page 191: Release Of Productivity Down Mode For Small Size Print Under High Temperature

    KONICA MINOLTA Confidential 3.3.6 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, the 120mm size toner band (30mm of each color x full length in machine front to rear direction) is created at every approx.
  • Page 192 KONICA MINOLTA Confidential the wearing is promoted. ・ When the wide size is printed after Less than 35 270,000 270,000 continuous print of A4size, CL blade ºC wearing is promoted at the area outside of A4 size. 4. For narrow paper...

  • Page 193: Adu Mt Lever Is Very Hard To Release

    KONICA MINOLTA Confidential 3.3.7. ADU MT lever is very hard to release (1) Symptom ADU MT lever is hard to release and lock. Consequently, it is difficult to pull out and push back the ADU MT. Locked Released (2) Cause The stopper material attached to the main body got deformed and the lock cannot be set and released.
  • Page 194 KONICA MINOLTA Confidential Remove the stopper part (A50U830200). (Screw x 2pcs) Insert the screwdriver from this space. If the work is difficult, remove the ADU MT. Stopper part (A50U830200) Remove 2 screws. Replace the stopper part. Table of contents - 193 -...

  • Page 195: Multi-Feed Of Plain Fine Paper Under High Temperature And High Humidity

    KONICA MINOLTA Confidential 4.1.1. Multi-feed of Plain/Fine paper under high temperature and high humidity (1) Symptom Under high temperature and high humidity environment, when very smooth surface plain paper or fine paper (Smooth finished etc) is fed, the multi-feed occurs.
  • Page 196 KONICA MINOLTA Confidential 4.1.2. PF-707/PF-707m Wrinkle on paper (1) Symptom When the thin paper (up to 91g/m ) is fed from PF-707, the wrinkle appears at the trailing edge of the paper. The symptom occurs more often when the Tray 5 (bottom tray) is used and at the 1 page of a job.
  • Page 197 KONICA MINOLTA Confidential (2) Cause (a) Wrinkle depressing ability is lowered by the wearing of PFU registration roller. (b) PFU horizontal conveyance roller/1 and 2 gets worn and the speed difference occurs between registration roller. At the Tray 5 (bottom tray), the paper lead edge posture is more unstable than Tray 3 and 4 and the symptom occurs more often and worse.

  • Page 198: Pf-707 Paper Skew Of Small Size

    KONICA MINOLTA Confidential 4.1.3 PF-707 Paper skew of small size (1) Symptom When small size is fed (the auxiliary guide applied size), paper skew becomes larger. (2) Cause In case the auxiliary paper guide is used, when the air blows, the paper gets on the gap between belt unit and auxiliary guide.
  • Page 199 KONICA MINOLTA Confidential 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. Peel off the release sheet of the PET and temporary attach the top part.
  • Page 200 KONICA MINOLTA Confidential Decide the distance between PET and paper feed suction belt. While looking through the window which is prepared at step 1, 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).

  • Page 201: Pf-707 Corner Fold (Dog Ear) And Conveyance Jam Of Small Size

    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.
  • Page 202 KONICA MINOLTA Confidential 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. When paper is curly, change the set direction as following image. If the set direction cannot be changed, set paper after reducing the curl.
  • Page 203 KONICA MINOLTA Confidential 4.1.5 Thick paper jam due to multi-feed (1) Symptom ・Multi-feed jam may occur on thick paper (257gsm or heavier) . JAM code: J-1610 J-1646 * When the paper inside the tray forms convex toward the bottom of the tray, curl tends to occur.
  • Page 204 KONICA MINOLTA Confidential 4.2.1. No feed JAM/ Paper skew when feeding a western style envelop (when use MK-746) (1) Symptom In combination with MK-746 and the specific size of the envelope, the no feed JAM (J-1501) or the paper skew may occur.
  • Page 205 KONICA MINOLTA Confidential Place the envelope on the flat location to check the leading edge curl. Downward curl/Flat Add the Bottom auxiliary plate Convex down Do not add the Bottom auxiliary Table of contents - 204 -...

  • Page 206: Lu-202M/Lu-202Xl J-1501(No Feed Jam) Occurs When The Thick Paper And The Coated Paper Is Fed

    KONICA MINOLTA Confidential 4.2.2. LU-202m/LU-202XL J-1501(No feed Jam) occurs when the thick paper and the coated paper is fed. (1) Symptom J-1501 (No feed JAM) occurs feeding from LU-202m/LU-202XL. Paper does not go over the paper stopper plate. Or paper stops just after feed roller nips.

  • Page 207: Lu-202M/Lu-202Xl J-1502(No Feed Jam) Occur When Feeding Coated Paper

    KONICA MINOLTA Confidential 4.2.3. LU-202m/LU-202XL J-1502(No feed JAM) occur when feeding coated paper (1) Symptom J-1502 (No feed JAM) occurs when feeding coated paper from LU-202m/LU-202XL. (2) Cause Paper cannot reach the pre-registration roller, as the paper feed power of the paper feed roller becomes lower when the component of the coating attaches to the roller.

  • Page 208: Lu-202Xl Black Line At 104Mm, 208Mm From Leading Edge 614Mm From Trailing Edge Or Narrow Trailing Space (Magnification Defect)

    KONICA MINOLTA Confidential 4.2.4. LU-202XL Black Line at 104mm, 208mm from leading edge 614mm from trailing edge or narrow trailing space (magnification defect) (1) Symptom When the thick long paper more than 217gsm is fed from LU-202XL, black line occurs at 104mm and 208mm from leading edge, and 614mm from trailing edge.

  • Page 209: J-7229 The Paper Trailing Edge Does Not Go Out The Paper Exit Section

    KONICA MINOLTA Confidential 4.3.1 J-7229 The paper trailing edge does not go out the paper exit section (Connecting OT-510) (1) Symptom J-7229 occurs and the paper trailing edge does not get out from the paper exit. Paper FS paper path...

  • Page 210: Irregular Correspondence Of The Main Tray Exit

    KONICA MINOLTA Confidential 4.4.1. Irregular correspondence of the main tray exit (1) Symptom The exit unalignment in a main tray occur due to electrostatic adsorption or electrostatic repulsion. (2) Cause The neutralizing effect of the neutralizing brush adopted as dirt of paper leading edge correspondence may not fully be acquired.
  • Page 211 KONICA MINOLTA Confidential ・When PI-502 is not connected 1. Loosen 2 screws.[1] 2. Remove the upper cover/Rt1[2] in the arrow-marked direction. 3. Remove the rear cover. 4. Remove 2 screws[1]. 5. Open the front door[2], remove 2 screws [3] and then remove the upper cover/Rt2[4].
  • Page 212 KONICA MINOLTA Confidential 6. Remove the front door. Remove 7 screws [1]. 7. Disconnect the connector [1] and remove the upper cover/Fr2 [2]. 8. Remove 3 screws [1] and then remove the upper cover/Rr [2.] - 211 -...
  • Page 213 KONICA MINOLTA Confidential 9. Remove the upper cover/Md. 10. Remove 4 screws [1], and remove the sub tray [2]. 11. Remove the exit part cover. Exit part cover - 212 -...
  • Page 214 KONICA MINOLTA Confidential 12. Remove the 2 screws from the inside of a machine. 13. It removes, while rotating a cover. - 213 -...
  • Page 215 KONICA MINOLTA Confidential 14. Replace and stuck of the neutralizing brush. Change part relative table Present Replace parts A4F37179(Q'ty:2) A4F38999(Q'ty:2) A4F37180(Q'ty:1) A4F38998(Q'ty:1) A4F37179⇔A4F38999 A4F37180⇔A4F38998 A4F37179⇔A4F38999 Attachment standard A section detail view Punch mark standard Sheet metal edge standard B section detail view...
  • Page 216 KONICA MINOLTA Confidential 15. Assembly Reinstall the preceding parts following the removal steps in reverse. Table of contents - 215 -...
  • Page 217 KONICA MINOLTA Confidential 4.5.1. IQ-501, C-6A01 (1) Symptom When Main body connects IQ-501 with VI-501, C-6A01 occurs (Only C2070 series). (2) Cause When the main body of C2070 series connects IQ-501with VI-511, C-6A01 may occur due to static electricity from the display port connector at 4 locations.
  • Page 218 KONICA MINOLTA Confidential 4.5.2. IQ-501 and MK-744C (Patlite), C-E002/E013 (1) Symptom When Main body, IQ-501 and MK-744C are connected, C-E002/C-E013 may occur (only C2070 series) (2) Cause When static electricity enters between one light to another light of MK-744C, it may trouble IQ- 501.
  • Page 219 KONICA MINOLTA Confidential 4.6.1. DF-706, [ADF Clean] icon appears (1) Symptom [ADF Clean] icon appears. (2) Cause The Scanning glass gets dirty. ADF scan was not performed correctly because it is installed aslant. (4) Solution Wipe the scanning glass and the reading roller with the wipe cloth.
  • Page 220 KONICA MINOLTA Confidential - 219 -...
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  • Page 222 KONICA MINOLTA Confidential Table of contents - 221 -...

This manual is also suitable for:

Accuriopress c2070pAccuriopress c2060Accurioprint c2060l

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