C7622, C7623 (bizhub C750i)

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Trouble typeC7622: Power line B2 error

C7623: 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. (Part# ACKNR70100)
  5. Replace EXCB. (Part# AA7NH00500)

(Link to the Field Service Manual)