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C9403 (bizhub C368/C308/C258)

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Trouble typeC9403: CIS LED lighting failure (When DF-704 is installed)
RankB
Trouble detection conditionAt the CIS gain adjustment, the machine detected that the output of the CIS LED is lower than the specified value.
Trouble isolationScanner
Relevant electrical parts• CIS module (CIS)CIS power supply (CISPU)
• Dual scan image processing board (DSIPB)
• MFP board (MFPB)
• CIS cable

 Procedure

  1. Check the back side scanning shading shaft for any stain, and clean up it as necessary.
  2. Check that the bearing of the back side glass cleaning roller unit is on the standby position.
  3. Correct the harness connection between CIS and DSIPB if faulty.
  4. Correct the harness connection between CIS J222-CISPU J2 if faulty.
  5. Measure the voltage of CISPU J1-1.
    • Control signal: CISPU J1-1 (DC12V)
    • Location of electrical component: DF-704 5-B
  6. Measure the voltage of CIS J222-1, J222-2 and J222-5.
    • Control signal: CIS J222-1 (DC5V), CIS J222-2 (DC5V), CIS J222-5 (DC12V)
    • Location of electrical component: DF-704 4-B
  7. For any abnormality in the measurement result, replace the CIS cable (Part# A85GN11701).
  8. Replace CIS. (Part# A85GM70001)
  9. Replace CISPU. (Part# A3CEPP4Y00)
  10. Replace DSIPB. Part# A7PUH02123)
  11. Replace MFPB. (Part# A7PUH02123)

NOTICE

  • Link to the wiring diagram (DF-704)

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

K.3.21.2 (Link to the Field Service Manual)

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