C9401 (bizhub 958/808)

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Trouble typeC9401: Exposure LED lighting failure/ROM contents error (MSC)
RankB
Trouble detection condition• The output from the CCD sensor is a predetermined value or less during CCD sensor gain adjustment.
• The wrong model of firmware is detected in the MFP board when the main power switch is turned ON.
• The machine type information (Machine, Type) registered to the machine differs from the actual machine type.
Trouble isolationScanner
Relevant electrical parts• LED exposure unit
• Flat cable (LED exposure unit)
• CCD board (CCDB)
• Scanner drive board (SCDB)
• MFP board (MFPB)

 Procedure

  1. Check the machine type information registered and reenter as necessary. For details the machine information, see Procedure.
  2. Correct the harness connection between SCDB CN3-LU201 if faulty.
  3. Correct the harness connection between SCDB CN2-MFPB CN1E if faulty.
  4. Correct the harness connection between CCDB PJ3-MFPB CN9 if faulty.
  5. Replace the LED exposure unit. (Part# A61FM31100)
  6. Replace the CCD unit. (Part# A795R71000)
  7. Replace SCDB (Part# A796H01A00)
  8. MFPB F3E conduction check
  9. Replace MFPB. (Part# A796H02003)

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

K.3.14.1 (Link to the Field Service Manual)