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Page 1 of 5 To: KONICA MINOLTA AUTHORISED TECHNICAL PERSONNEL From: KONICA MINO

Page 1 of 5 To: KONICA MINOLTA AUTHORISED TECHNICAL PERSONNEL From: KONICA MINOLTA BUSINESS SOLUTIONS (UK) LTD TECHNICAL SUPPORT GROUP. Date: 13/03/2009 Topic: bizhub C203/C253/C353 Malfunction Code C-2152 Trouble Shooting Guide Symptom : C-2152 may still occur, even though the Machine has been modified with the new Mounting Bracket (A02E-1121-11) for the Pressure/Retraction Sensor PS31, the new Actuator Arm (A02E-1122-12) for the PS31 Sensor and the new Detecting Plate (A02E- 5033-01) on the back of Transfer Film assy) that operates the Actuator Arm and the Sensor. Cause : There are 3 main reasons why the Code C-2152 will be shown. (They are shown in order of their most common incidences) : 1. The Modified White Plastic Detecting Plate (on the rear of the Transfer Belt Assy.) does not always operate the Actuator Arm of the PS31 Sensor completely. 2. The Clutch CL7 which drives the Pressure/Retraction Rollers of the Transfer Belt Assy. is contaminated with Grease or Rust causing it to Slip. 3. No Power (Voltage) being supplied to the Clutch CL7 Clutch. Action : Use the following C-2152 Trouble Shooting Guide to rectify the problem. P a g e 1 o f 5 Page 2 of 5 Code C-2152 Trouble Shooting Guide 1) First of all, check the operation of the CL7 Clutch that drives the Pressure/Retraction mechanism, is it working or not. a. Remove the Rear Cover of the Machine, b. Turn the Machine OFF/ON and then when it shows "Stabilizing Image", check that the CL7 grey coloured shaft turns 180O degrees and stops (Pressure position, Rollers all down). At the end of the "Stabilizing Mode" the shaft should turn another 180O degrees to return the Back Up Rollers to the Retracted position (all up). **NOTE** To see the end of the shaft, you will need to look over the top of the PWB-MFP Board, and then down slightly. A small blob of Tipex will aid you to see that the shaft turns. 2) If the CL7 Shaft, DOES turn 180O degrees, then go to Section 1 (Checking PS31 Sensor Operation). 3) If the CL7 Shaft, DOES NOT turn 180O degrees, then go to Section 2 (Checking the CL7 Operation). Section 1: Checking PS31 Sensor Operation. 1. Remove The Transfer Belt Assembly from the Machine and place it on A CLEAN, FLAT SURFACE (Ensure there are no screws etc. on the surface). 2. Remove the 4 Image Units and place them on a CLEAN FLAT SURFACE, and cover them with several A3 sheets or a clean cloth to protect the PC Drums from the light. 3. With the Machine turned ON, enter the Service Mode and select "State Confirmation" > "Sensor Check" and then select the screen with PS31 on it. 4. Check the outputted data changes from "0" to "1" and visa versa when you operate the PS31 Sensor Actuator Arm using your hand. 5. If the outputted data DOES NOT change, Replace the PS31 Sensor.(9335 1300 61) 6. Re-Check the outputted data of PS31 in the "State Confirmation" screen. 7. If the outputted data still does not change, replace the Printer Control Board (PRCB) (A02E H001 06 PWB-MC). 8. If the outputted data DOES now change, refit all components removed from the machine and test it to ensure the problem of C-2152 is repaired. 9. If C-2152 DOES re-occur, go to Section 3, "Fitting a Spacer to the White Plastic Detecting Plate". Section 2: Checking CL7 Clutch Operation. If, after checking the rotation of the grey CL7 Clutch Shaft, it is found not to be rotating smoothly, carry out the following : 1. Remove the CL7 Clutch Assembly complete from the rear of the machine, by removing the PWB- MFP assembly, complete with it's metal mounting frame and the Toner Supply Drive Motor 2. Check the CL7 Clutch for Rust or Excessive Grease, and Clean / Replace it as necessary (A02E M200 00) 3. Refit all of the parts removed, and test that the Code C2152 has been rectified. 4. If the code HAS NOT been rectified, check for the rotation of the CL7 grey shaft again, and if it still does not turn, check the ICP7 on PWB-MC (Printer Control Board). 5. With the Machine Unplugged, check for continuity across the ICP7 Fuse on PWB-MC is not open circuit. If it is open circuit (Blown), replace the PWB-MC board, (A02E H001 06). P a g e 2 o f 5 Page 3 of 5 Section 3: Fitting a Spacer to the White Plastic Detection Plate. 1) Change the Back Up Roller's position from the "Retracted Position" to the "Pressure Position". Rotate the Pressure/Release Gear 'B' to change to the Pressure position. (The rotating direction does not matter.) This is the Pressure position. The hole must be vertically up and down. **NOTE** Do Not Lose This Pin 2. Now remove The Metal Plate Remove the Screw 'A', E-ring, Gear 'B' (Fig. D), Pin (fig. E) and the Metal Plate 'C. Remove the M2 Screw from the Metal Plate and remove the White Colour Plastic part 'D' from the Metal plate. <Fig. F> <Fig. H> 3. As a FIELD FIX, you can make a Modification Spacer (shown above) from 1 or 2 thicknesses of an OHP sheet. By using the Plastic Block "D" as a template, place it on the OHP and draw around it. Then you can cut it out and trim it to the rough shape as shown. Cont. P a g e 3 o f 5 Page 4 of 5 4. Now insert 1 Modification Spacer (that you have just made), between the White Colour Plastic Block and the Metal Plate, this will move the block away from the Metal Plate and closer to the PS31 Actuator Arm. **NOTE** Set the above 2 Projections correctly and then refit the M2 Screw. 5. Refit the Metal Plate onto the Transfer Belt Unit. **NOTE** The white plastic parts MUST be seen when refitting the Metal Plate. Cont. P a g e 4 o f 5 Page 5 of 5 6. Refit the Metal Plate to the Transfer Belt Assy using the Screw, E-ring and Pin. Rotate the Pressure/Release Gear to change the Rollers to the "Released" position. Making sure they move freely and return to the Released position. **NOTE** If the setting is incorrect, the Rollers do not move to the Released position. 7. Refit the Transfer Belt Unit back into the Machine. Make sure the Drive Gears are meshed correctly. 8. Check the Transfer Belt Unit is correctly set in the Machine. (IMPORTANT) a) Turn on the Main Switch. b) Open the Front Door when the Machine starts "Stabilizing Image" (for Pressure/Release position recording in Machine). c) Close the Front Door. **NOTE** (IMPORTANT) If you forget the above procedure. a) Colour images are not printed, (Black is OK). b) The First Transfer Rollers for Y.M.C are in the "Pressure" position when B/W printing, and the PC Drums can be damaged. 9) Test the Machine to make sure the C-2152 code is now fixed. If not, carry out this procedure again but adding a 2nd Spacer behind the White Plastic Block. 10. After Re-assembling the Machine, test it again to make sure the fault is rectified. End. RJE. 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