C392B (bizhub 558/458)

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Trouble typeC392B: Fusing sensor wire breaks detection (difference of temperature)
RankA
Trouble detection conditionThe difference between the temperature corrected by the heating roller thermistor 1 (TH1) and the temperature detected by the heating roller thermistor 2 (TH2) exceeds a predetermined value.
Trouble isolation–
Relevant electrical parts• Fusing unit
• Heating roller thermistor 1 (TH1)
• Heating roller thermistor 2 (TH2)
• MFP board (MFPB)

 Procedure

  1. Check the fusing unit for correct installation (whether it is secured in position).
  2. Check the open/close operation of the right door.
  3. Check the fusing unit-MFPB CN22E for proper connection and correct or change as necessary. (bizhub 558)
  4. Check the fusing unit-MFPB CN12E for proper connection and correct or change as necessary. (bizhub 458)
  5. Replace the fusing unit. (bizhub 558 Part# A9E8030 / bizhub 458 Part# A79MR70200)
  6. Replace MFPB. (558 Part# A9HGH02102 / 458 Part# A9HHH02102)

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

K.3.13.11 (Link to the Field Service Manual)