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C40A2, C40A3, C40A4, C40A4, C40A5, C40A6, C40C3, C40C5 (bizhub 950i/850i)

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Trouble type– C40A2: Mechanical controller PF communication data error

– C40A3: Mechanical controller PF transmission timeout

– C40A4: Mechanical controller PF communication pulse error

-C40A5: QSPI communication clock switching error

– C40A6: Mechanical controller ASIC communication error

– C40C3: CTL PF transmission timeout 1

– C40C5: CTL PF transmission timeout 2
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.
  5. BASEB F2E conduction check.
  6. Replace BASEB.

(Link to the Field Service Manual)

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