C5501 (bizhub C650i/C550i/C450i)

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Trouble typeC5501: AC signal abnormality (bizhub C450i)
RankC
Trouble detection conditionThe zero cross signal is not input during fusing phase control.
Trouble isolation–
Relevant electrical parts-Fusing unitDC 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. (C650i/C550i Part# AA7NR70200 / C450i Part# AA7RR70700)
  6. Replace CPUB. (C450i Part# AA7RH02P02 / C550i Part# AA7PH02P01 / C650i Part# AA7NH02P03)
  7. Replace BASEB. (Part# AA7NH02102)
  8. Replace DCPU. (bizhub C650i/C550i Part# AA7NR71600 / bizhub C450i Part# AA7RR70200)

L.3.12.10 (Link to the Field Service Manual)