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C4501 (bizhub C4050i/C3350i)

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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-BASEB CN13 for proper connection and correct as necessary.
  2. Check CPUB for proper installation and correct as necessary.
  3. Replace the PH unit. (3350i) AAJTR70100 )(4050i) AAJRR72000 )
  4. Replace CPUB. ( A93EH01004 )
  5. Replace BASEB. ( A93EH02007 )

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

(Link to the Field Service Manual) L.3.9.4.

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