C9404 (bizhub C759/C659)

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Contents

Trouble type	C9404: CIS LED lighting abnormally
Rank	B
Trouble detection condition	After a scan job is completed, the machine detected that the average output of the CIS LED is greater than the specified value.
Trouble isolation	Scanner
Relevant electrical parts	-CIS module (CIS) -DF power supply (DFPU) -Dual scan image processing board (DSIPB) -MFP board (MFPB)

 Procedure

1. Correct the harness connection between CIS J101-DSIPB CN2 if faulty.
2. Correct the harness connection between CIS J102-DFPU CN2 if faulty.
3. Replace CIS. (Part# A782R70200)
4. DFPU ICP1 conduction check.
5. Replace DCPU. (Part# A795R73722)
6. Replace DSIPB. (Part# A8JEH02A00)
7. MFPB F3E conduction check
8. Replace MFPB. (Part# A8JEH02002)

L.3.15.2 (Link to the Field Service Manual)