C6755 (bizhub C759/C659)
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Contents
| Trouble type | C6755: CIS gain adjustment failure |
| Rank | B |
| Trouble detection condition | After the gain adjustment is performed at the start-up, the peak value of the output data is lower than a given value. |
| Trouble isolation | Scanner |
| Relevant electrical parts | -CIS module (CIS) -Dual scan image processing board (DSIPB) -DF power supply (DFPU) -MFP board (MFPB) |
Procedure
- Correct the harness connection between CIS J101-DSIPB CN2 if faulty.
- Correct the harness connection between CIS J102-DFPU CN2 if faulty.
- Check for possible extraneous light and correct as necessary.
- Clean the back side reading glass and the shading sheet if dirty.
- Replace CIS. (Part# A782R70200)
- Replace DSIPB. (Part# A8JEH02A00)
- DFPU ICP1 conduction check.
- Replace DCPU. (Part# A795R73722)
- MFPB F3E conduction check
- Replace MFPB. (Part# A8JEH02002)
L.3.13.9 (Link to the Field Service Manual)