CDF51, CDF71, CDFA1 (C4751i)

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ByEric Ditges
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Trouble typeCDF51: ASIC image version failure (back side)CDF71: ASIC image access failure (back side)CDFA1: ASIC image error (back side)
RankC
Trouble detection conditionCommunication error is detected between the CPU board (CPUB) and the DF CIS module (DF CIS).
Trouble isolation–
Relevant electrical partsDF CIS module (DF CIS)CPU board (CPUB)Base board (BASEB)

Procedure

  1. Check the connector between DF CIS-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.
  5. Replace CPUB.
  6. Replace BASEB.

(Link to the Field Service Manual)