CD402 (bizhub C759/C659)

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Trouble typeCD402: ACK command incorrect
RankC
Trouble detection conditionWhen abnormality is found in the communication of controller.
Trouble isolation–
Relevant electrical partsMFP board (MFPB)

 Procedure

  1. Check whether there is a strong electromagnetic noise source near the main body.
  2. Check the connectors on MFPB for proper connection and correct as necessary.
  3. Replace MFPB. (Part# A8JEH02002)

L.3.18.28 (Link to the Field Service Manual)