C4501 (bizhub 287/227)

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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.
Trouble isolation–
Relevant electrical parts-PH unit
-MFP board (MFPB)

 Procedure

  1. Check the connector between the PH unit-MFPB CN18 for proper connection and correct as necessary.
  2. Replace the PH unit. (Part# A891R70000)
  3. Replace MFPB. (Part# A7AHH0201D)

K.3.11.3 (Link to the Field Service Manual)