C3307 (bizhub 950i/850i)

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Trouble typeC3307: Fusing edge cooling fan/2 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– Fusing edge cooling fan/2 (FM27)
– Paper feed/transport drive board (PFTDB)
– CPU board (CPUB)
– Base board (BASEB)

Procedure

  1. Check the connector between FM27-relay CN832-relay CN166B-PFTDB CN31 for proper connection and correct as necessary.
  2. Check the fan for possible overload and correct as necessary.
  3. Check CPUB for proper installation and correct as necessary.
  4. FM27 load check
    • Check code: 42
    • Multi code: 28
    • Control signal: PFTDB CN31-4 (REM), PFTDB CN31-5 (LOCK)
    • Location of electrical component: 4-P
  5. Replace FM27.
  6. PFTDB F22 conduction check.
  7. Replace PFTDB.
  8. Replace CPUB.
  9. Replace BASEB.

(Link to the Field Service Manual)