C4301 (bizhub 958/808)

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Contents

Trouble typeC4301: PH cooling fans 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• PH cooling fan (FM14)
• PH relay board (PHRYB)
• MFP board (MFPB)

 Procedure

  1. Check the connector between FM14-relay CN202-PHRYB CN4 for proper connection and correct as necessary.
  2. Check the fan for possible overload and correct as necessary.
  3. FM14 operation check
    • Control signal: PHRYB CN4-8 (DRIVE), PHRYB CN4-9 (LOCK)
    • Location of electrical component: 6-B, 7-B
  4. Replace FM14. (Part# 9J03M10000)
  5. PHRYB F2 conduction check.
  6. Replace PHRYB. (Part# A796H00300)
  7. Replace MFPB. (Part# A796H02003)

NOTICE

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

K.3.10.4 (Link to the Field Service Manual)