C5351 (bizhub 650i/550i/450i)

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Trouble typeC5351: PH/power supply cooling fan failure to turn
RankB
Trouble detection conditionThe fan lock signal remains Low for a predetermined continuous period of time while the fan is turning.
Trouble isolation–
Relevant electrical parts-PH/power supply cooling fan (FM1)
-Expansion control board (EXCB)
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check the connector between FM1-relay CN26-EXCB CN10EX for proper connection and correct as necessary.
  2. Check the fan for possible overload and correct as necessary.
  3. Check the connector between EXCB CN2EX-BASEB CN12E for proper connection and correct as necessary.
  4. Check CPUB for proper installation and correct as necessary.
  5. FM1 load check
    • Check code: 42
    • Multi code: 1
    • Control signal: EXCB CN10EX-6 (REM), EXCB CN10EX-8 (LOCK)
    • Location of electrical component: 22-P
  6. Replace FM1. (Part# A93EM10000)
  7. Replace EXCB. (Part# AC74H00501)
  8. Replace CPUB.
    650i/550i (Part# AC74H02P03)
    450i (Part# AC76H02P02)
  9. Replace BASEB. (Part# AC74H02101)

(Link to the Field Service Manual)