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C9401 (bizhub C759/C659)
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Contents
| Trouble type | C9401: Exposure LED lighting failure / ROM contents error (MSC) |
| Rank | B |
| Trouble detection condition | -The output from the CCD sensor is a predetermined value or less during CCD sensor gain adjustment. -The wrong model of firmware is detected in the MFP board when the main power switch is turned ON. -The machine type information (Machine, Type) registered to the machine differs from the actual machine type. |
| Trouble isolation | Scanner |
| Relevant electrical parts | -LED exposure unit -Flat cable (LED exposure unit) -CCD board (CCDB) -Scanner drive board (SCDB) -MFP board (MFPB) |
Procedure
- Check the machine type information registered and reenter as necessary. For details the machine information, see Entering the machine type information.
- Correct the harness connection between SCDB CN3-LU201 if faulty.
- Correct the harness connection between SCDB CN2-MFPB CN1E if faulty.
- Correct the harness connection between CCDB PJ3-MFPB CN9 if faulty.
- Replace the LED exposure unit. (Part# A61FM31100)
- Replace the CCD unit. (Part# A795R71000)
- Replace SCDB. (Part# A796H01A00)
- MFPB F3E conduction check
- Replace MFPB. (Part# A8JEH02002)
L.3.15.1 (Link to the Field Service Manual)