C720A (bizhub C650i/C550i/C450i)

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Trouble typeC720A: Registration clutch failure (bizhub C550i/C450i)
RankC
Trouble detection conditionAfter starting the clutch, an error is detected for the malfunction detection signal.
Trouble isolation–
Relevant electrical parts-Registration clutch (CL4)
-Base board (BASEB)

Procedure

  1. Check the connector between CL4-relay CN73-relay CN170-BASEB CN15E for proper connection and correct as necessary.
  2. Check the connector of CL4 for proper drive coupling and correct as necessary.
  3. CL4 conduction check.
    • Control signal: BASEB CN15E-2 (ON)
    • Location of electrical component: 3-C
  4. Replace CL4. (Part# A02EM20000)
  5. Replace BASEB. (Part# AA7NH02102)

L.3.14.20 (Link to the Field Service Manual)