C7251 (bizhub C750i)

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Trouble typeC7251: Developing solenoid failure
RankC
Trouble detection conditionAfter starting the solenoid, an error is detected for the malfunction detection signal.
Trouble isolation–
Relevant electrical parts-Developing solenoid (SD4)
-Expansion control board (EXCB)

Procedure

  1. Check the connector between SD4-relay CN159-EXCB CN14EX for proper connection and correct as necessary.
  2. Check the connector of SD4 for proper drive coupling and correct as necessary.
  3. SD4 conduction check.
    • Control signal: EXCB CN14EX-7 (REM)
    • Location of electrical component: 17-P
  4. Replace SD4. (Part# A161M20300)
  5. Replace EXCB. (Part# AA7NH00500)

(Link to the Field Service Manual)