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C5501 (bizhub 558/458)

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Trouble typeC5501: AC signal abnormality (bizhub 458)
RankC
Trouble detection conditionThe zero cross signal is not input during fusing phase control.
Trouble isolation–
Relevant electrical parts• Fusing unit
• Fusing power supply (FUPU)
• DC power supply (DCPU)
• MFP board (MFPB)

 Procedure

  1. Check the fusing unit for correct installation (whether it is secured in position).
  2. Check the fusing unit, FUPU, DCPU, and MFPB for proper connection and correct or change as necessary.
  3. Replace the fusing unit. (558 Part# A9E8030 / 458 Part# A79MR70200)
  4. Replace MFPB. (558 Part# A9HGH02102 / 458 Part# A9HHH02102)
  5. Replace FUPU (458 Part# A79MM40N00)
  6. Replace DCPU. (Part# A9HGR70100)

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

K.3.17.9 (Link to the Field Service Manual)

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