C3B02 (bizhub 558/458)

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Trouble typeC3B02: IH malfunction (CPU) (bizhub 558)
RankA
Trouble detection conditionA failure in communication with the fusing CPU continues for a predetermined period of time.
Trouble isolation–
Relevant electrical parts• Fusing unit
• IH coil (IHC)
• IH power supply (IHPU)
• IH magnetic erasing board (IHMEB)
• NF board (NFB)
• MFP board (MFPB)

 Procedure

  1. Check the fusing unit for correct installation (whether it is secured in position).
  2. Check the open/close operation of the right door.
  3. Check the fusing unit-MFPB CN22E for proper connection and correct or change as necessary.
  4. Check the connector between MFPB CN13E-NFB CN3 for proper connection and correct as necessary.
  5. Check the connector between NFB CN2-IHPU CN1 for proper connection and correct as necessary.
  6. Check the connector between IHPU-IHC for proper connection and correct as necessary.
  7. Check the connector between IHC-IHMEB for proper connection and correct as necessary.
  8. Replace the fusing unit. (558 Part# A9E8030 / 458 Part# A79MR70200)
  9. Replace IHC. (558)(Part# A79KM40C00)
  10. Replace IHPU. (558)(Part# A8KNM40A02)
  11. Replace IHMEB. (558)(Part# A2XKH00A00)
  12. Replace MFPB. (558 Part# A9HGH02102 / 458 Part# A9HHH02102)
  13. Replace NFB. (Part# A795M40J00)

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

K.3.13.12 (Link to the Field Service Manual)