CDF51, CDF71, CDFA1 (bizhub 4750i/4050i)

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Contents

Trouble type	CDF51: ASIC image version failure (back side) CDF71: ASIC image access failure (back side) CDFA1: ASIC image error (back side)
Rank	C
Trouble detection condition	Communication error is detected between the CPU board (CPUB) and the DF CIS module (DF CIS).
Trouble isolation	–
Relevant electrical parts	-DF CIS module (DF CIS) -CPU board (CPUB) -Base board (BASEB)

Procedure

1. Check the connector between DFCISRYB CN2-BASEB CN5 for proper connection and correct as necessary.
2. Check CPUB for proper installation and correct as necessary.
3. Rewrite the firmware.
4. Replace the DF CIS module assy. (Part# AAJNR70900)
5. Replace CPUB. (Part# ACT9H01003)
6. Replace BASEB.
   4750i (Part# ACT9H02013)
   4050i (Part# ACT9H02002)

(Link to the Field Service Manual)