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C4101 (bizhub 650i/550i/450i)

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Trouble typeC4101: Polygon motor rotation trouble
RankB
Trouble detection condition-The polygon motor fails to turn stably even after the lapse of a given period of time after activating and changing rotation speed the polygon motor.

-Motor lock signal detects HIGH for a given period time consecutively during the polygon motor is rotating.
Trouble isolation–
Relevant electrical parts-PH unit
-Expansion control board (EXCB)
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check the connector between the PH unit-relay CN306-EXCB CN10EX for proper connection and correct as necessary.
  2. Check the connector between EXCB CN2EX-BASEB CN12E for proper connection and correct as necessary.
  3. Check CPUB for proper installation and correct as necessary.
  4. Replace the PH unit.
    650i/550i(Part# AC74R70200)
    450i (Part# AC76R70100)
  5. Replace EXCB. (Part# AC74H00501)
  6. Replace CPUB.
    650i/550i(Part# AC74H02P03)
    450i (Part# AC76H02P02)
  7. Replace BASEB. (Part# AC74H02101)

(Link to the Field Service Manual)

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