C9401, C9402 (bizhub 4750i/4050i)

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Trouble typeC9401: CIS LED lighting failure (front side)

C9402: CIS LED lighting abnormally (front side)
RankB
Trouble detection conditionC9401: At the CIS gain adjustment, the machine detected that the output of the CIS LED is lower than the specified value.

C9402: The average output value of the CIS LED with the scanner at its standby position is a predetermined value or more at the end of a scan job.
Trouble isolationScanner
Relevant electrical parts-Flat cable
-CIS module (IR CIS)
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check the connector between IR CIS-BASEB CN6 for proper connection and correct as necessary.
  2. Check CPUB for proper installation and correct as necessary.
  3. Replace the flat cable.
  4. Replace IR CIS. (Part# AAJNR71200)
  5. Replace CPUB. (Part# ACT9H01003)
  6. Replace BASEB.
    4750i (Part# ACT9H02013)
    4050i (Part# ACT9H02002)

(Link to the Field Service Manual)