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C5304 (bizhub C759/C659)

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Trouble typeC5304: IH power supply cooling fan failure to turn
RankB
Trouble detection conditionThe fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
Trouble isolation
Relevant electrical parts-IH power supply cooling fan (FM10)
-Process drive board (PDB)

 Procedure

  1. Check the connector between FM10-relay CN298-PDB CN9 for proper connection and correct as necessary.
  2. Check the fan for possible overload and correct as necessary.
  3. FM10 load check
    • Check code: 42
    • Multi code: 5, 6
    • Control signal: PDB CN9-16 (DRIVE), PDB CN9-17 (LOCK)
    • Location of electrical component: 19-P
  4. Replace FM10. (Part# 9J03M10000)
  5. PDB F3 conduction check
  6. Replace PDB. (Part# A8JEH00400)

L.3.12.2 (Link to the Field Service Manual)

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