C7616 (bizhub 4750i/4050i)

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Trouble typeC7616: Power line A21 error
RankC
Trouble detection conditionThe fuse detection unit detected an error for a predetermined time.
Trouble isolation–
Relevant electrical parts-Toner transport motor (M4)
-Toner supply motor (M5)
-Base board (BASEB)

Procedure

  1. BASEB F5E conduction check
  2. Check the connector between M4-BASEB CN11E for proper connection and correct as necessary.
  3. Check the connector between M5-BASEB CN11E for proper connection and correct as necessary.
  4. Replace M4. (Part# A7PUM10700)
  5. Replace M5. (Part# A7PUM10700)
  6. Replace BASEB.
    4750i (Part# ACT9H02013)
    4050i (Part# ACT9H02002)

(Link to the Field Service Manual)