C5501 (bizhub 287/227)

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Trouble typeC5501: AC signal abnormality
RankC
Trouble detection conditionThe zero cross signal is not input during fusing phase control.
Trouble isolation–
Relevant electrical parts-Fusing unit
-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-relay CN7AC-DCPU CN2 for proper connection and correct or change as necessary.
  3. Check the connector between DCPU CN7-MFPB CN2E for proper connection and correct as necessary.
  4. Replace the fusing unit. (Part# A7AHR72311 or A7AHPP3800(For refresh model))
  5. MFPB F1E conduction check
  6. Replace MFPB. (Part# A7AHH0201D)
  7. Replace DCPU. (Part# A7AHR70500 or A7AHPP3300(For refresh model))

K.3.12.8 (Link to the Field Service Manual)