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C2558 (bizhub C759/C659)
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Contents
| Trouble type | C2558: Abnormally high toner density detected black TCR sensor |
| Rank | B |
| Trouble detection condition | The 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 -Sub hopper unit -Toner empty sensor/K (PZS/K) -MFP board (MFPB) |
Procedure
- Reinstall developing unit/K.
- Reinstall toner cartridge/K.
- Check the connector between PZS/K-relay CN248-relay CN265-MFPB CN4E for proper connection and correct as necessary.
- PZS/K I/O check, sensor check
- Control signal: MFPB CN4E<B>-12 (ON)
- Location of electrical component: 17-C
- Replace the developing unit/K. (Part# A9K703D)
- Replace MFPB. (Part# A8JEH02002)
- Replace the sub hopper unit. (Part# A2X0R71433)
L.3.9.15 (Link to the Field Service Manual)