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C3B03 (bizhub C759/C659)

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Trouble typeC3B03:
-IH malfunction (CPU)
-IH power supply for incorrect marketing area (The IH power supply for incorrect marketing area is installed)
RankA
Trouble detection conditionThough the IH heater is OFF, mechanically, the ON status is detected. (Malfunction of IH heater operation)
Trouble isolation–
Relevant electrical parts-IH power supply unit (IHPU)
-Noise filter (NF1)
-MFP board (MFPB)

 Procedure

  1. Check the open/close operation of the upper right door.
  2. Check the connector between NF1 CN2-IHPU CN1 for proper connection and correct as necessary.
  3. Check the connector between IHPU CN6-MFPB CN26E for proper connection and correct as necessary.
  4. Check the connector between NF1 CN3-MFPB CN29E for proper connection and correct as necessary.
  5. Check the connector between CN1AC-NF1 CN1 for proper connection and correct as necessary.
  6. Replace IHPU. (Part# A8KNM40A02)
  7. MFPB F2E or F21E conduction check
  8. Replace MFPB. (Part# A8JEH02002)

L.3.10.15 (Link to the Field Service Manual)

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