C4501 (bizhub C650i/C550i/C450i)

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Trouble typeC4501: Laser malfunction
RankB
Trouble detection condition-SOS signal is not detected even after the lapse of a given period of time after starting the laser output.
-SOS signal is not detected for a given period of time during printing or IDC sensor adjustment.
Trouble isolation–
Relevant electrical parts-PH unit
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check the connector between the PH unit-relay CN307-BASEB CN17E for proper connection and correct as necessary.
  2. Check CPUB for proper installation and correct as necessary.
  3. Replace the PH unit. (C450i Part# AA7RR70100) / C650i/C550i Part# AA7NR70500)
  4. Replace CPUB. (C450i Part# AA7RH02P02 / C550i Part# AA7PH02P01 / C650i Part# AA7NH02P03)
  5. Replace BASEB. (Part# AA7NH02102)

L.3.11.3 (Link to the Field Service Manual)