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C40A4 (bizhub C4050i/C3350i)

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Trouble type C40A4: Mechanical controller PF communication pulse error
RankC
Trouble detection conditionA CPU communication error is detected.
Trouble isolation
Relevant electrical parts• CPU board (CPUB) 
• Base board (BASEB)

Procedure

  1. Turn OFF the main power switch and unplug the power cord. Connect the power cord after 15 sec. or more, and turn ON the main power switch.
  2. Check CPUB for proper installation and correct as necessary.
  3. Rewrite the firmware.
  4. Replace CPUB. ( A93EH01004 )
  5. BASEB F15E and PTC2E conduction check
  6. 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.3.9.2. 

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