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C6754, C6755 (bizhub C750i)
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Contents
Trouble type | C6754: CIS clamp adjustment failure C6755: CIS gain adjustment failure |
Rank | B |
Trouble detection condition | C6754: After the gain adjustment is performed at the start-up, the CIS clamp adjustment value is too high or too low. C6755: 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) -CIS power supply (CISPU) -CPU board (CPUB) -Base board (BASEB) |
Procedure
- Check the connector between CIS CN2-BASEB CN5 for proper connection and correct as necessary.
- Check CPUB for proper installation and correct as necessary.
- Correct the harness connection between CIS CN1-CISPU 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# AAMPR70100)
- Replace CISPU. (Part# A3CKH00200)
- Replace CPUB. (Part# ACKNH02P03)
- Replace BASEB. (Part# ACKNH02101)