C9401, C9402 (C4751i)

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ByEric Ditges
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Contents

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 partsFlat cableCIS 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.
  5. Replace CPUB.
  6. Replace BASEB.

(Link to the Field Service Manual)