C4501 (C4751i)

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ByEric Ditges
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Contents

Trouble typeC4501: Laser malfunction
RankB
Trouble detection conditionSOS 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 partsPH unitCPU board (CPUB)Base board (BASEB)

Procedure

  1. Check the connector between the PH unit-BASEB CN60 for proper connection and correct as necessary.
  2. Check CPUB for proper installation and correct as necessary.
  3. Replace the PH unit.
  4. Replace CPUB.
  5. Replace BASEB.

(Link to the Field Service Manual)