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C5501 (bizhub 4750i/4050i)

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Trouble typeC5501: AC signal abnormality
RankC
Trouble detection conditionThe zero cross signal is not input.
Trouble isolation–
Relevant electrical parts-Fusing unit
-DC power supply (DCPS)
-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 DCPS CN6-BASEB CN1E for proper connection and correct as necessary.
  3. Check the connector between the fusing unit-relay CN2-DCPS CN2 for proper connection and correct as necessary.
  4. Check CPUB for proper installation and correct as necessary.
  5. Replace the fusing unit. (Part# ACT8R70100)
  6. Replace CPUB. (Part# ACT9H01003)
  7. Replace BASEB.
    4750i (Part# ACT9H02013)
    4050i (Part# ACT9H02002)
  1. Replace DCPS. (Part# AAJRR70600)

(Link to the Field Service Manual)

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