C9401, C9402 (bizhub 650i/550i/450i)

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Contents

Trouble type	C9401: Exposure LED lighting failure C9402: Exposure LED lighting abnormally
Rank	B
Trouble detection condition	C9401: The output from the CCD sensor is a predetermined value or less during CCD sensor gain adjustment. C9402: The average output value of the CCD sensor with the scanner at its standby position is a predetermined value or more at the end of a scan job.
Trouble isolation	Scanner
Relevant electrical parts	-LED exposure unit -Flat cable (LED exposure unit) -CCD unitScanner drive board (SCDB) -CPU board (CPUB) -Base board (BASEB)

Procedure

1. Correct the harness connection between SCDB CN3-LU201 if faulty.
2. Check the connector between SCDB CN2-BASEB CN6E for proper connection and correct as necessary.
3. Check the connector between CCDB CN2-BASEB CN6 for proper connection and correct as necessary.
4. Check CPUB for proper installation and correct as necessary.
5. Replace the LED exposure unit. (Part# AA7NM31200)
6. Replace the CCD unit. (Part# AA7NR72500)
7. SCDB ICP2 conduction check
8. Replace SCDB. (Part# AA7NH01A00)
9. Replace CPUB.
   650i/550i (Part# AC74H02P03)
   450i (Part# AC76H02P02)
10. Replace BASEB. (Part# AC74H02101)

(Link to the Field Service Manual)