C2558 (bizhub 287/227)

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Trouble typeC2558: Abnormally high toner density detected black TCR sensor
RankB
Trouble detection conditionThe TC ratio of the toner determined by the toner replenishment control is detected to be the predetermined value or over for consecutive times.
Trouble isolation–
Relevant electrical parts-Developing unit/K
-Toner cartridge/K
-MFP board (MFPB)

 Procedure

  1. Reinstall developing unit/K.
  2. Reinstall toner cartridge/K.
  3. Check the connector between the developing unit-relay CN15-MFPB CN17E for proper connection and correct as necessary.
  4. Replace the developing unit/K. (Part# A7Y003D)
  5. Replace MFPB. (Part# A7AHH0201D)

K.3.9.5 (Link to the Field Service Manual)