C7623 (bizhub C650i/C550i/C450i)

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Trouble typeC7623: Power line B3 error
RankC
Trouble detection conditionThe fuse detection unit detected an error for a predetermined time.
Trouble isolation–
Relevant electrical parts-PH unit
-Expansion control board (EXCB)

Procedure

  1. EXCB ICP1 or ICP3 conduction check.
  2. Check the connector between the PH unit-relay CN306-EXCB CN10EX for proper connection and correct as necessary.
  3. Check the connector between the PH unit-relay CN300-EXCB CN7EX for proper connection and correct as necessary.
  4. Replace the PH unit. (C650i/C550i Part# AA7NR70500 / C450i Part# AA7RR70100)
  5. Replace EXCB. (Part# AA2JH00500)

L.3.14.52 (Link to the Field Service Manual)