C7301 (bizhub C750i)

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Trouble typeC7301: PH/power supply cooling fan failure
RankC
Trouble detection conditionAfter starting the fan, an error is detected for the malfunction detection signal.
Trouble isolation–
Relevant electrical parts-PH/power supply cooling fan (FM1)
-Expansion control board (EXCB)

Procedure

  1. Check the connector between FM1-relay CN26-EXCB CN10EX for proper connection and correct as necessary.
  2. Check the connector of FM1 for proper drive coupling and correct as necessary.
  3. FM1 conduction check.
    • Control signal: EXCB CN10EX-6 (REM), EXCB CN10EX-8 (LOCK)
    • Location of electrical component: 22-P
  4. Replace FM1. (Part# A93EM10000)
  5. Replace EXCB. (Part# AA7NH00500)

(Link to the Field Service Manual)