C6755 (bizhub 558/458)
Contents
| Trouble type | C6754: CIS clamp adjustment failure |
| Rank | B |
| Trouble detection condition | After the gain adjustment is performed at the start-up, the CIS clamp adjustment value is too high or too low. |
| Trouble isolation | Scanner |
| Relevant electrical parts | • CIS module (CIS) • Dual scan image processing board (DSIPB) • CIS power supply (CISPU) • MFP board (MFPB) |
Procedure
- Correct the harness connection between CIS and DSIPB if faulty.
- Correct the harness connection between CIS J222-CISPU J2 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# A85GM70001)
- Replace DSIPB. (Part# A7PUH02A01)
- Replace CISPU. (Part# A3CEPP4Y00)
- Replace MFPB. (558 Part# A9HGH02102 / 458 Part# A9HHH02102)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
K.3.19.9 (Link to the Field Service Manual)