KONICA MINOLTA Confidential 100 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. For all the cases, the toner on the fusing belt attaches to the image at next belt cycle. Therefore the symptom occurs in the cycle of fusing belt. (311 mm interval) (a) Static electricity offset (b) High temperature offset (c) Low temperature offset (d) Noise given by the electrostatic (Refer to 1.2.17 of Troubleshooting Guide) (e) Noise at trailing edge (Refer to 1.2.15 of Troubleshooting Guide) The parameter which have big influence on offset is as follows. • Grounding for fusing heat roller <(a)/(d)/(e)> • 2nd transfer separation current <(a)/(d)/(e)> • Fusing belt temperature <(a)/(b)/(c)(d)/(e)> • (Moisture in the paper) • (Paper properties) (2) Cause (a) Static electricity offset When the paper behavior after passing 2nd transfer (the distance from the separation pole) changes, the charge given to the toner changes accordingly. It lowers the electrostatic absorption power between toner and paper. The image is affected by the electric field when it enters to the fusing nip. Consequently the toner re-transferred to the fusing belt. (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. (c) Low temperature offset Lower heat supply to the toner at fusing nipping part. Under this condition, the anchor Paper feed direction 311mm A B C D A B C D
KONICA MINOLTA Confidential 101 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. When the image enters to the fusing nip, it gets effect of the electric field and scatters the image, causing darker density. (e) Trailing edge noise Paper charging amount at the trailing edge is high on of the thick paper. This potential remains on the fusing belt and affects the next image. (Color lines if toner is scattered or white line if toner is separated) (3) Solution 1. 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. Do not increase too much. • Plain paper Static electricity noise • Coated paper Unstable behavior Wrinkle occurs, separation ability gets poorer Static electricity noise occurs When the symptom is not improved by increasing the separation current, the cause is not Noise given by the electrostatic. After reset [Separation DC] value, go to the 3. Static electricity offset. 2. Static electricity offset 1. Decrease [Separation DC (Front)] [Machine]→[Paper Setting]→[Change Set]→[Expert Adj] Rough indication: Change every 20 step. 2. Increase [Separation AC (Front)] [Machine]→[Paper Setting]→[Change Set]→[Expert Adj] Rough indication: Change every 20 step. Depending on paper, [Separation AC(Front) or (Back) ] decrease of the setting may be effective to improve the symptom. When the increase of the setting value is not effective, try to decrease the setting value. Note When the separation current is decreased for the thin paper, the paper behavior may become unstable. Wrinkle, or thin paper transfer feed failure occur. Therefore do not decrease too much. 3. Check the paper status • Use just unpacked paper (when the paper moisture is low, the symptom tends to occur) • If the Dehumidifier SW is set to ON, turn OFF. •The SW is located on the main body, near the power supply cable. Note Under the high humidity environment, if the heater is set to OFF, lighter image or wrinkle may occur.
KONICA MINOLTA Confidential 102 When the symptom is not improved, it is not Static electricity offset. Perform next step after reset the value. 3. High temperature offset 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. Side effect: Fusing under When the symptom is not improved, it is not High temperature offset. Perform next step after reset the value. 4. Fusing under Adjust fusing belt temperature by changing Upper Fusing Roller Temperature Access [Machine]→[Paper Setting]→[Change Set]→[Expert Adj] Adjust Upper Fusing Roller Temperature. Increase Upper Fusing Roller Temperature Note When the upper fusing roller temperature is increased, following symptom may occur. Therefore, do not to increase too much. • Fusing wrapping JAM • Too much paper curl after printing • When printing the 2nd page, corner folding/JAM/transfer repelling at lead edge and trailing edge because that the paper curl on the 1st page is large 5. Check the paper surface condition When the surface of the paper is not smooth, symptom tends to occur. Suggest customer to tray another paper type as needed When using envelope fusing unit (EF-103) When the offset of K color occurs under envelop mode, to increase the value of 2nd Transfer Output Adj. (Front) may improve the symptom. Shift the value to plus direction. As requirement of this function, install the following ROM and change the DIPSW. C- ROM : 00C1-18 and later DIPSW 41-7 : 1 (default 0) Change the range of 2nd Transfer Output from +/-50 to +/- 120. DIPSW107-4: 1 (default 0) When the value of 2nd transfer output has set about more than +100, it causes extremely light image density problem due to automatic correction of 2nd transfer output under low
KONICA MINOLTA Confidential 103 temperature and low humidity. To prevent that, the automatic correction of 2nd transfer output is limited partially under low temperature and low humidity. There is no side effect. Adjustment of 2nd transfer output Press [Machine]→ [Paper Setting]→[Change Set]→[Expert Adj.]→ [2nd Transfer Output Adj.(Front)]→[+50], then increase the value per +10 until the symptom is improved. When the symptom is not improved, perform the above solution from 1 to 6. Table of contents
KONICA MINOLTA Confidential 104 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)
KONICA MINOLTA Confidential 105 Background (Enlarged view) 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. The new DU applies especially much lubricant at the beginning and too much foreign material is caught by the lubricant. (3) Solution Enable toner band control. The toner band provides toner to the transfer belt cleaning the lubricant on it, which is a known function to prevent too much lubricant. And cleaning failure, FD line and background may be reduced. It improves condition inside developing unit, and is effective to be keep stable density. When the toner band control is enabled, the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. This may cause soilage on the 2nd transfer Blank space
KONICA MINOLTA Confidential 106 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. 1. 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, Toner Refresh Mode is automatically executed. 2. Turn the DIPSW for the band. Change toner band creation interval. [Service]→[System Setting]→[Software DIPSW Setting] Recommendation value: (Y/M/C/K) 3% Screw mark, Poor transfer (Emboss paper): (Y/M/C/K) 5% DipSW 0% 1.5% 3% 5% Toner band creation setting Color(YMC) DipSW104-0= 0 DipSW104-1= 0 (Default) DipSW104-0= 0 DipSW104-1= 1 DipSW104-0= 1 DipSW104-1= 0 (推奨) DipSW104-0= 1 DipSW104-1= 1 0% 1.5% 3% 5% Toner band creation setting BK DipSW104-2= 0 DipSW104-3= 0 (Default) DipSW104-2= 1 DipSW104-3= 0 DipSW104-2= 0 DipSW104-3= 1 (推奨) DipSW104-2= 1 DipSW104-3= 1 Toner band setting 0% 1.5% 3% 5% Release the 2nd transfer pressure DipSW103-7 = 0 (Default) DipSW103-7= 1 (推奨) DipSW103-7= 1 (推奨) DipSW103-7=1 (推奨) Note When the band creation control is set to 5% coverage, cleaning failure may occur due to too much waste toner in the intermediate transfer cleaning unit. When the band creation control is enabled while the intermediate transfer cleaning unit reaches over the half of the limit count, cleaning failure may occur. In that case, replace the blade of the intermediate transfer cleaning unit. When the developer is deteriorated, the effect of the setting change may not appears. When the band creation setting is enabled, KMI recommends to replace the developer together. When the band is enabled, the 2nd transfer roller is in pressed state when the toner is supplied to the intermediate transfer belt. This may cause soilage on the 2nd transfer 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 is enabled, release the 2nd transfer pressure. DIPSW103-7:1 Reduces the productivity (Reduce by max 10% for A4 conversion) Table of contents
KONICA MINOLTA Confidential 107 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. (2) Cause The transfer current in the paper feed area becomes insufficient because too much electric current flows to outside of the paper feed area. The lower the 2nd transfer roller resistance is, the more the electric current flows outside of paper area. Conditions to lowering the resistance of the roller Not smooth surface paper Small size paper (ex. Postcard) Thick paper High temperature High humidity Temperature increase due to ambient temperature and/or due to continuous printing The 2nd transfer roller is at the early stage of the life; The count does not reach around the one third of the TC. Uneven density occurs Normal image
KONICA MINOLTA Confidential 108 (3) Solution 1. Change DipSW1-0 to 1 to display Expert Adjustment to Paper Setting. [Service mode]→[System Setting]→[Software DipSW Setting] 2. [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. Setting range: -50 to +50 The smaller the setting value is, the larger, the 2nd transfer output current is. 3. When the effect is not enough but improvement is seen, the adjustment range is expanded to from -120 to +120 after setting the DipSW41-7 to 1 and turn OFF/ON the power switch. Additionally, adjust by every -5 to -10 steps. 4. When the improvement is not seen in the –(minus) direction, adjust to +(plus) direction by every 10 steps. Note If set to minus direction too much, white spots may occur. Table of contents
KONICA MINOLTA Confidential 109 1.3.25. Lighter density part at trailing edges of wide paper (1) Symptom When printing on wide paper, irregular lighter density part occurs. The problem depends on paper width/thickness. - It tends to occur on wider size SRA3(width 320mm) or more. - It tends to occur on thin paper less than 128gsm. - It tends to occur on solid images. (2) Cause Uneven paper attitude at entering fuser nip due to incorrect alignment of fusing unit. (3) Solution Adjust the fusing unit alignment. 1. Remove the fusing unit. 2. Loosen 2 screws. 3. Adjust the alignment using by adjustment jig. The pattern changes at 100- 150mm from trailing edge. Zoom Changed the pattern Changed the pattern Zoom
KONICA MINOLTA Confidential 110 4. Tighten 2 screws. Note The adjustment affect for the skew in the main scan direction of the image trailing edge section. Table of contents Shaft from main body - Rear Swing the fuser angle.
KONICA MINOLTA Confidential 111 1.4.Troubleshooting by using CSRA 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. Try the solution from the top of the list. When the he symptom is not solved, go to the next item. 1. Press the Administrator Call. *[Setup menu] -> [Administrator settings] -> [System linkage] -> [Administrator Call] 2. Access to the following URL of CSRA(CS Remote Analysis) after 5 minutes. (It takes max. 5 minutes for CSRA system to register data.) https://csra.konicaminolta.jp Note *To login the CSRA, you need to enter your User ID and Password. For more information, please refer to TNBT1600039 *.
KONICA MINOLTA Confidential 112 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
KONICA MINOLTA Confidential 113 5. After checking the date time of the search results, select the trouble that applies from the dropdown 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.) PC View Mobile View
KONICA MINOLTA Confidential 114 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 Mobile View Table of contents
KONICA MINOLTA Confidential 115 2. Paper conveyance failure 2.1 Others 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) ) (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. (Go to Solution(b) ) (c) Paper type Depending on paper type, the influence of the paper fiber is very big in some cases. (Go to Solution(c)) (3) Solution (a) Caused by paper shrinkage rate Change DipSW1-0 from 0 (Default) to 1, to display expert adjustment in paper setting. Decrease fusing upper roller temperature for respective tray setting. [Machine]→[Paper Setting]→[Change Set]→[Expert Adjustment] Rough target for the adjustment is by 10°C. If not enough, gradually decrease (by Max. 20°C). Print approx 20 sheets of test pattern No. 69, and check no fusing under offset occurs. (b) Moisture content caused To correct it, use the paper fresh from opening the package (containing less moisture). (c) Paper type caused If the paper waving still occurs after decreasing fusing temperature and using paper fresh from opening the package, propose customer to try another paper type. Table of contents
KONICA MINOLTA Confidential 116 2.1.2. Setting for OHP sheet printing (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). (b) J-3101 While forming registration loop, the sheet gets loosened and the registration sensor misdetects. (c) Fusing wrapping jam When the plain paper is set for paper type, wrapping jam tends to occur due to the relation with the fusing temperature setting. (3) Solution (a) Off-centering by 5mm Disable centering sensor. Change DipSW1-0 from 0 (Default) to 1, to display expert adjustment in paper setting. [Machine]→[Paper Setting]→[Change Set]→[Expert Adj.]→[Centering Adj.]→[Not Detect] (b) J-3101 Change registration loop amount to prevent the sheet gets too loosened. Set the registration loop amount to [-5.0mm]. [Machine]→[Paper Setting]→[Change Set]→[Both Sides Adj.]→[Registration Loop], If the [-5.0mm] setting does not improve enough, change the setting by every [-0.5mm] and see the result. (c) Fusing wrapping jam Change Paper type to [Fine] or [Color Specific] [Machine]→[Paper Setting]→[Change Set]→[Paper Type] Note: After finishing OHP printing, return the set to the original value. Table of contents
KONICA MINOLTA Confidential 117 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. Then, when the trailing edge passes the registration, fusing roller turns the paper position. (3) Solution Before taking the following action, check that the Side1 image position adjustment is done properly. Adjustment items: alignment of registration and fusing (mechanical adjustment), CD-Mag. Adjustment, CD-Mag. Adjustment Crosswise Dir. Skew Adj. 1. Change decurler setting for each tray Machine → [Paper Setting]→[Change Set]→[Expert Adj.]→[Output Curl (Back on Top)] Note Curl level changes depending on paper/environment (temperature, humidity), coverage. So check the curl level and conduct adjustment [Auto] → [+1], [+2]. 2. Adjust fusing temperature Reduce fusing upper roller temperature to reduce curl after print Machine →[Paper Setting]→[Change Set]→[Expert Adj.]→[Upper Fusing Roller Temperature] The rough target is to decrease by 10°C and reduce gradually, maximum by 20°C. Note When the fusing upper roller temperature is reduced too much, fusing under offset or repelling may occur. Print 20 sheets of the test pattern No.69 to check the fusing ability. 3. Change newly unpacked paper (low moisture content). 4. Change paper type After taking the above steps 2 and 3 and the symptom is not improved, suggest customer to use another type of paper. Table of contents
KONICA MINOLTA Confidential 118 2.1.4. Printed paper curls and paper feeding failure due to paper curls (without RU connection) (1) Symptom Printed paper curls largely. Mis-align output and paper feeding failure (Corner holding, Wrinkle and JAM) may occur due to paper curl. (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>). However, because the paper exit curl changes depending on the coverage/ambient environment/paper brand, it is impossible to cover all conditions by the automatic control. (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]→[Expert Adj.]→[Output Curl Adjustment]/[Output Curl (Back on Top)], select a setting (Selection: [Auto], [0], [+1] and [+2]). The idea for the setting is shown in the table below. Note Adjustment direction judged from output curl adjustment and output curl (back on top) adjustment is as shown in the following table. * Curl direction is defined by the paper ejected state from main body. Adjustment Curl direction Setting to reduce curl (left curl larger, right curl smaller) Output curl adjustment Convex curl [2] → [1] → [0] Concave curl [0] → [1] → [2] Output curl (Back on Top) adjustment Convex curl 0] → [1] →[2]. Concave curl [2] → [1] → [0] When face-up is selected, the paper is not sent to the reverse exit demurer roller. So, the curl adjustment is not necessary.
KONICA MINOLTA Confidential 119 • Convex curl • Concave curl ← : Paper exit direction Both side 1 side Face up Face down Curl direction Convex Curl Concave Curl Convex Curl Concave Curl Concave Curl Convex Curl Setting +2 0 +2 +1 (0) +2 +1 (0) (b) Fusing temperature adjustment Depress paper curl by reducing upper fusing roller temperature. [Machine]→[Paper Setting]→Select a Tray→ [Change Set]→[Expert Adj.]→[Upper Fusing Roller Temperature] The rough target is decrease by 10°C decrease. (Maximum for the adjustment is 20 °C decrease). Gradually decrease. Note When the temperature is decreased too much, fusing under offset/toner repelling may occur. Print 20 sheets of test pattern No.69 and check the fusing ability then set the optimum value. (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, suggest customer to use another type of paper. Table of contents
KONICA MINOLTA Confidential 120 2.1.5. Fusing wrapping jam (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. Especially when the paper is very soft and thin, it tends to wrap the fusing belt. (3) Solution Following 4 choices are available. Please select the most suitable one for the user. (a) Adjust Lead Edge Erase Quantity 1. Change the DIPSW 1-0 to 1. 2. Access [Machine]→[Paper Setting]→[Change Setting]→[Expert Adj]. Adjust the [Lead Edge Erase Quantity] to set the maximum erasure width of the leading edge image 3. Access [Service] → [Machine Adjustment] → [Printer Adjustment] → [Restart Timing Adjustment] Adjust the [Restart Timing Adjustment] to set not to wrap. Note Since the lead and trailing edge image data are erased, check the original image lead and trailing edge if it can be erased. (b) Adjust Fusing Air Separation Air Level Setting 1. Change the DIPSW 1-0 to 1. 2. Access [Machine]→[Paper Setting]→[Change Setting]→[Expert Adj]. Press [Strong] to increase air volume. Note Since the paper is strongly blowed down, the paper may be pressed against the claw or guide at the non-fusing side. This may cause the scratch. Or, if the temperature is decreased while continuous printing, the fusing under offset may occur. Especially, mind this when the setting is combined with the "Fusing Temeprature Adjustment". (c) Fusing temperature adjustment 1. Change the DIPSW1-0 to 1. 2. Access [Machine]→[Paper Setting]→[Change Setting]→[Expert Adj] and Decrease Upper Fusing Roller Temperature of each tray. Gradually decrease the temperature. The target of the adjustment is by 10ºC (Maximum 20 ºC) Print test pattern No. 69 by 20 sheets and confirm no fusing under offset occurs. Note When the temperature is decreased too much, fusing under offset occurs. Therefore, adjust the temperature while checking the image. (d) Enable [Toner Amount Save] 1. From the paper setting screen, select the tray where the paper is loaded. Check the Toner Amount Save. If it is set to ON, see the Note of the No. 5. If it is set to OFF, go to the step 2.
KONICA MINOLTA Confidential 121 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. 4. Change the setting of [Toner Amount Save] from [OFF] to [ON].
KONICA MINOLTA Confidential 122 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; shadow part, dark high chroma color. · Toner Amount save level is selectable from 2-level by the following DIPSW. DIPSW2-1 (Image part), DIPSW2-2 (Text/Graphic part). "0": Normal level "1": Stronger If the setting "0" (Norma level) for each is not enough, try setting "1" (Stronger). (However, the side effect also occurs stronger) Table of contents
KONICA MINOLTA Confidential 123 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. (b) Side regulating plates When the side regulating plates is fixed with screw while they are pressed strongly against the paper, the top of the regulating plates tilt inward as shown in the below figure. When the plate lifts up, the paper contacts with side regulating plates and friction increases. This causes no feed jam. (c) Roller The dust attaches to the roller surface or roller gets worn. (d) Paper Type Large resistor paper (ex. Thick paper) may not be picked up. (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. Fixing material Lift up plate Sides regulating plates
KONICA MINOLTA Confidential 124 (c) Clean and replace roller Clean the roller to remove paper dust and any soilage or replace it. (d) ・ Paper feed assist setting Set the paper feeding of the paper feed assist setting, enable re-feeding when no feed. However, productivity will be rather low. 1. Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. 2. Set [Paper Setting] → [Expert Adj.] → [Paper Feed Assist Set.] → [Manual] → [Paper Feeding] Add P1 load When the paper stops at paper pick up roller or paper does not reach to the feed roller, increase the weight on the pick-up roller (65AA4008 Paper feed Auxiliary Plate) as shown in the photo below to increase the load. Note The screw may get loosened or steel plate position may move. So, carefully apply the solution. When the weight is added, the gap is created. This may cause the loosened screw or shift of the weight Loosen the knob of the screw, move the side plates then tighten again. Add one piece of 65AA4008
KONICA MINOLTA Confidential 125 Do not attach the weight to C8000/7000/6000/6501/5501, as paper feed solenoid does not move by the weight. Add P2 load When the paper stops on the feed roller or paper leading edge stops at the downstream of paper feed roller, change the P2 load to "Strong". (Refer to the Service manual "Mechanical Adjustment→Separation pressure adjustment of 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. So carefully apply the adjustment. Table of contents
KONICA MINOLTA Confidential 126 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. It is pressed to the paper and appears as dents on the paper. (3) Solution 1. Clean the fusing paper exit roller. Pull out the ADU mount and open the reverse section. Clean the roller indicated in the below figure with the cleaning pad and the drum cleaner. Rotate to arrowed direction little by little and clean the surface to remove the foreign material.
KONICA MINOLTA Confidential 127 2. 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 Note Do not break the tip of the claws while cleaning. Table of contents Clean this area
KONICA MINOLTA Confidential 128 <Normal> <Centering error> 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) . (a) Main body registration unit caused 1. On the centering sensor of the main body, paper dusts attaches and causing erratic detection. 2. Centering sensor (on the main body) broke. (b) PFU caused 3. PF-707/602m or its tray position is not correctly aligned with the main body. (3) How to identify cause unit At the beginning, check whether the paper size is correctly set / paper is set to the tray correctly. If the size setting is unmatched with the actual size, set the correct size. If the paper is not neatly set to the tray, adjust to the correct position. If the paper size is set correctly and the paper is set correctly, follow the workflow in the next step. (4) Solution Following in the workflow chart at the last part of the document, try the solution step by step. (a) When the cause is on the main body (Degas) registration unit. 1. Clean the centering sensor of the main body with the Kim wipe etc. 2. If the cleaning not enough, replace centering sensor on the main body. (b) When the cause is on the PF-602m/PF-707 3. Correct PF-602m/PF-707 position/and its tray position →Please refer to the Service manual : I12.2/I12.3. Note After cleaning or replacing the centering sensor, conduct the centering adjustment. Off centered
KONICA MINOLTA Confidential 129 [1 [2 [4] [3] (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]. 3. Clean the centering sensor 4. If the cleaning is not enough, replace the centering sensor. Part number: A50UM55100 Centering sensor
KONICA MINOLTA Confidential 130 Flow of the work Note: The sensor in the below flow means centering sensor. Table of contents Centering error (over ± 5mm) Set the paper size setting correctly and then set the paper correctly on the tray No Does the symptom limited to PFU feed? (Not for main body Failure location: Main body Location: PFU Clean the sensor on the main body Check the dust attachment to the centering sensor on the main body. Sympto m recur? The sensor on the main body broke Replace the sensor on the main body Yes Check PFU and tray position (Should align with main body). Yes No Yes No Paper size setting is correct and paper is set to the tray correctly.
KONICA MINOLTA Confidential 131 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 in duplex on the coated paper (surface smooth paper) or uncoated paper. More occurrence is seen on coated paper. ・ No feed jam or double feed jam occurs on off-line finisher ・ Output paper stick to the exit tray ・ Output paper is not aligned ・ Paper curls on the exit tray ・ Staple position shifts. ・ Center folding is not performed correctly (2) Cause While stacking the paper on the tray, paper stick or repel and move due to the static electricity on the paper. (3) Solution 1. Set the [Output Paper Separation Setting]. [Paper Setting]→[Change Setting]→[Expert Adjustment]→[Output Paper Separation Setting] ON(Coated) : Apply current at duplex print when Coated paper is specified. ON(Uncoated) : Apply current at duplex print when Uncoated paper is specified. Manual : The manually adjusted current is applied. OFF : No current application Note • When the Process Adj. is not indicated, change the DIPSW1-0 (To show expert adjustment in the Paper Setting) from "0" to "1" (Show). 2. When the symptom is not improved after selecting [ON(Coated)] and [ON(Uncoated)], for [Output Paper Separation Setting], select [Manual ] and set [Offset Value]. <How to determine Offset Value > Test the several offset values mentioned in below steps to find the best result. 1. Access Test Pattern Output mode of service mode and enter following value. [Service Mode]→[Test Mode]→[Test Pattern Output Mode] [Test Pattern]：53 [Gradation-Y]：0 [Gradation-M]：255 [Gradation-C]：255 [Gradation-K]：0 Press [Print Mode]
KONICA MINOLTA Confidential 132 2. Load the large size such as A3 and 11x17 to the tray. 3. In [Print Mode], select [1→2] and [Full Color].
KONICA MINOLTA Confidential 133 4. 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] 5. Change [Offset Value] to the following and print 20 sheets on large size such as A3 or 11x17. The offset value : -30/-20/-10/+10/+20/+30 6. Select [OFF] for the [Output Paper Separation Setting] and print 20 sheets on large size such as A3 (11x17) (Reference) When the coverage is high on Side1 and low on Side2, the better result is expected when the + (positive) value is set. When the coverage is low on Side1 and high on Side2, the better result is expected Note: Before printing, check that the ON(Coated) and ON(Uncoated) is selected correctly. ON(Coated) : Apply current at duplex print of Coated paper. ON(Uncoated) : Apply current at duplex print of Uncoated paper The offset value mentioned in step 5 is for the initial check. After confirming the paper sticking condition, conduct fine tuning. 7. Leave the printed samples on the desk for around 30 to 60 minutes. Do not mix up sets of different setting. 8. Pull the top sheet on the set and check the sticking level. Select the least sticking setting to register a paper profile. Instruct the customer to use the profile. Note Do not try the extreme value such as -50 to +50 for the [Offset Value] from the beginning, When the value is changed by the large steps, the setting will be far from the optimum, causing the strong paper sticking. 3. When the symptom still remains after step3 and the HM-102 is installed, enable humidifier for the print. <Condition that humidifier functions> Weight: 136gsm and over Type: Color paper and coated paper [Paper Setting]→[Change Setting]→[RU Curl Adj.]→[Humidifier Set.]
KONICA MINOLTA Confidential 134 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] DIPSW94-7 Contents 0 Prohibited (Default) 1 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. Therefore, be sure to check whether the change of DIPSW is effective. 4. When the tested paper has been exposed in the high temperature and high humidity environment, check if the symptom changes when the paper just unpacked is used. 5. When the problem remains at the use of off-line finisher even conducting step 5, request customer to manually separate or use the jogger just before setting the paper to the offline finisher Table of contents
KONICA MINOLTA Confidential 135 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
KONICA MINOLTA Confidential 136 (c) Folding error with Misalignment (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. (b) Characteristic problem of each machine mechanism - By the difference of toner, Characteristic problem of each machine mechanism become prominent. (3) Solution 1. Exchange to the previous model of Anti-Static Brush - About detail of exchanging procedure, please refer to TABT1600243*. Caution 1. If you refer to this procedure, please confirm the "Occurrence location" and "conveyance route". And please exchange the Anti-Static brush for conveyance route. 2. If you will installation for Color machine, the paper edge might become dirty as side-effect. Because the previous Anti Static Brush is hard material, the surface of printed toner is shaved by brush. Correct folding position Stapling position
KONICA MINOLTA Confidential 137 3. Please confirm the Anti-Static Brush type as bellow before exchanging. Brush type The detail of brush Necessity of exchanging Thunder-ron Brush Need to exchange SUS Brush Need not to exchange 2. Correspondence for each options -The Target model are as bellow. 1. SD-510 => TABT1502274* -About the detail of procedure, please refer to TABT1600243*. Table of contents
KONICA MINOLTA Confidential 138 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. (This code will be applied on Ver1.5 FW) conditions View from exit View from entrance => depend on paper size A4 Trail edge is not seen 100 X 148 (postcard) Almost all sizes A3
KONICA MINOLTA Confidential 139 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. To remove JAM paper (a) For long length paper that trail edge is seen Pull out the paper by holding the paper where toner fixed. And turn the knob M5 to clock wise on need. A4S M5 Holding the paper around here Pull out
KONICA MINOLTA Confidential 140 (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. ・ 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. Then paper separate from belt. Therefor you can hold paper by hand easily. And pull out as shown in 2-2-1. 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 Pull out Holding the paper around here Paper stuck perfectly: At first use the other paper corner edge and insert gradually. Paper stuck unperfectly : Use the other paper line edge.
KONICA MINOLTA Confidential 141 2.1.12. 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 Fig.1: Paper path (3) Solution Direction (a) 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] →[Expert Adj.]. 1. Change setting of Output Curl Adjustment value to the [2] (When both side) [Machine]→[Paper Setting]→[Change Set]→[Expert Adj.]→[Output Curl Adjustment] →[2] 2. 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 3. If effect is not enough after executing above 3 types of solution, replace the separate discharging plate unit. Remove the separate discharging plate unit from the 2nd transfer unit. Install the new one. Direction (a) Direction (b) Normal paper path Separation discharge plate unit
KONICA MINOLTA Confidential 142 Direction (b) 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. 図 2．2 次転写ユニット概要図 Feed direction Discharge needle position adjustment location When the discharge needle assy is removed, Pins as shown in Fig 2 can be seen. Separate discharging plate unit Remove from 2nd transfer unit.
KONICA MINOLTA Confidential 143 Fig. 3: The needle adjustment mechanism (Machine rear) Fig.4: The needle adjustment mechanism (Machine rear) adjustment direction 4. Attach the holding sheet (A03U523911) on the guide plate/B. Referring to following photos, attach it to protrude by 5mm toward the separation discharging pole. When protruded amount is small, effect is small. When it is large, it interferes with the separation discharging pole. (tolerance: plus minus 0.5mm) Note Confirm not to interfere with sensor on the middle of the guide plate/B. (check movement of the actuator by hand) Upper: For cause (a) Lower: for cause (b) Discharge needle position adjustment Remove pin Indication: Joint part with intermediate transfer unit 2nd transfer roller Feed Direction Feed Direction
KONICA MINOLTA Confidential 144 Should not protrude from the side guide plate at machine front. (Target: 1 mm inside) Note When it is properly attached, the hole and edge of the holding sheet are almost on the same face. Confirm no interference with the sensor.
KONICA MINOLTA Confidential 145 5. Use following paper profile. Coated paper MO 81-91gsm weight：Improving feedability of MO paper(81-91gsm)NL Coated paper GO 81-91gsm weight：Improving feedability of GO paper(92-105gsm)NL Coated paper GO 92-105gsm weight：Improving feedability of GO paper(92-105gsm)NL Fine paper 62-74gsm weight：Improving feedability of fine paper(62-74gsm)NL Fine paper 81-91gsm weight：Improving feedability of fine paper(81-91gsm)NL 6. Set DipSW107-5=1 (Thin paper separation priority mode). Service mode→[System setting]→[Software DIPSW setting] Note If lost or low density Image of leading edge occur, reset to DipSW [0] or set [Leading edge erase quantity] with checking image. [Paper setting]→[Expert Adj.]→[Leading edge erase quantity]. Table of contents
KONICA MINOLTA Confidential 146 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 1st side. Consequently, the paper lead edge of the 2nd side cannot enter to the fusing unit stably and wrinkle occurs. (3) Solution 1. Change De-curler setting Change the DipSW1-0 from 0 (Default) to 1 to show process adjustment. Paper curl direction changes according to the paper characteristic. Therefore, check the printed paper and decide the optimum setting from 0, +1 or +2. [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Output Curl (Back on Top)] 2. Adjust fusing temperature [Machine]→[Paper Setting]→[Change Set]→[Process Adj.]→[Upper Fusing Roller Temperature] Reduce temperature for respective trays. The target of the adjustment is to reduce by 10°C (Max is 20°C). Gradually reduce the temperature. Note: To prevent toner from detaching, set the temperature which does not cause fusing under offset. To confirm, print 20 sheets of test pattern #69. 3. Change the paper which is just unpacked (low moisture content paper) 4. If the above steps do not solve the symptom, ask customer to use another type of paper. 5. Replace with [Guide Plate/B (A50U758201)]. Note When replace old type Guide plate (A50U747402) with [Guide Plate/B] of new type, also replace following parts together because old and new are not compatible. Insulating Plate /Front (A50U7448912) Insulating Plate /Front (A50U749112) Fusing Roller/1 (A50U720111) 6. Use following paper profile. Fine paper 62-74gsm weight：Improving feedability of fine paper(62-74gsm) NL Fine paper 81-91gsm weight：Improving feedability of fine paper(81-91gsm) NL (Released on TNBT1800082*) Table of contents
KONICA MINOLTA Confidential 147 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. Note The fusing separation claw may have gotten dirt because of fusing offset. It is recommend to apply solution of [1.3.21 Image offset caused by fusing unit]. (3) Solution Conduct periodic and spot cleaning of the fusing separation claw. Pull out the ADU mount and open the reverse section, open paper ejection plate then clean the contacting side of the roller with the cleaning pad and drum cleaner. (5 claws) Note Be careful not to break the tip of the claw. Table of contents Clean this area
KONICA MINOLTA Confidential 148 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. Referential image (2) Cause When the paper is not stiff, the edge of the paper is lifted up by the fusing exit actuator. The paper may enter to the fusing exit roller with this state. Depending on the paper pass, the fusing exit roller entering angle is different and this causes the symptom. When the paper enters to the fusing exit roller upper in the very vertical angle, the possibility of the corner folding occurrence becomes high. Fusing _Left side view Rear Front Center of paper feed Paper Actuator is positioned at machine front side
KONICA MINOLTA Confidential 149 Fusing unit_Cross Section (Front view) Conditions which symptom tends to occur more often • Paper width: Approx. 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, adjust the temperature of the fusing roller upper to + (plus) direction or fusing roller lower to the - (minus) direction and let the paper move along the upper guide. Note When increasing the fusing upper roller, be careful not to cause the wrapping of the fusing upper belt. Table of contents Downstream Upstream Actuator lifts up the edge of the not stiff and narrow width paper. Paper entrance angle to the fusing exit roller varies depending on the paper