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CD406 (bizhub C650i/C550i/C450i)

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Trouble typeCD406: ACK receiving timeout
RankC
Trouble detection conditionWhen abnormality is found in the communication of controller.
Trouble isolation–
Relevant electrical parts-Control panel
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check whether there is a strong electromagnetic noise source near the main body.
  2. Check the connector between the control panel-BASEB CN7 for proper connection and correct as necessary.
  3. Check CPUB for proper installation and correct as necessary.
  4. Replace CPUB. (C650i Part# AA7NH02P03 / C550i Part# AA7PH02P01 / C450i Part# AA7RH02P02)
  5. Replace BASEB. (Part# AA7NH02102)

L.3.19.28 (Link to the Field Service Manual)

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