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C5358 (bizhub C750i)

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Trouble typeC5358: HaCS 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-HaCS power supply cooling fan (FM5)
-Expansion control board (EXCB)
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Check the connector between FM5-EXCB CN9EX 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. FM5 load check
    • Check code: 42
    • Multi code: 17, 18
    • Control signal: EXCB CN9EX-1 (REM), EXCB CN9EX-3 (LOCK)
    • Location of electrical component: 27-X
  6. Replace FM5. (Part# A93EM10000)
  7. Replace EXCB. (Part# AA7NH00500)
  8. Replace CPUB. (Part# ACKNH02P03)
  9. Replace BASEB. (Part# ACKNH02101)

(Link to the Field Service Manual)

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