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C5501 (bizhub 650i/550i/450i)

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Trouble typeC5501: AC signal abnormality (bizhub 450i)
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)
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check the fusing unit for correct installation (whether it is secured in position).
  2. Check the connector between the fusing unit-relay CN95-BASEB CN4E for proper connection and correct as necessary.
  3. Check the connector between DCPU CN7-BASEB CN2E for proper connection and correct as necessary.
  4. Check CPUB for proper installation and correct as necessary.
  5. Replace the fusing unit.
    650i (Part# AA7NR70200)
    450i/550i (Part# AA7RR70700)
  6. Replace CPUB.
    650i/550i (Part# AC74H02P03)
    450i (Part# AC76H02P02)
  7. Replace BASEB. (Part# AC74H02101)
  8. Replace DCPU. (bizhub 650i/550i / bizhub450i)
    bizhub 650i/550i (Part# AA7NR71600)
    450i (Part# AA7RR70200)

(Link to the Field Service Manual)

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