C9404 (bizhub C759/C659)

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Trouble typeC9404: CIS LED lighting abnormally
RankB
Trouble detection conditionAfter a scan job is completed, the machine detected that the average output of the CIS LED is greater than the specified value.
Trouble isolationScanner
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)