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C2554 (bizhub C759/C659)
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Contents
| Trouble type | C2554: Abnormally high toner density detected magenta TCR sensor |
| Rank | B |
| Trouble detection condition | TC ratio in the developing unit, which is determined by toner replenishing amount control mechanism, is a predetermined value or more for a given number of times consecutively. |
| Trouble isolation | – |
| Relevant electrical parts | -Imaging unit/C -Imaging unit/M -Imaging unit/Y -Toner cartridge/C -Toner cartridge/M -Toner cartridge/Y -Sub hopper unit -Toner empty sensor/C (RS/C) -Toner empty sensor/M (RS/M) -Toner empty sensor/Y (RS/Y) -MFP board (MFPB) |
Procedure
- Reinstall the imaging unit.
- Reinstall the toner cartridge.
- Check the connector between RS/C-relay CN291-relay CN265-MFPB CN4E for proper connection and correct as necessary.
- Check the connector between RS/M-relay CN246-relay CN265-MFPB CN4E for proper connection and correct as necessary.
- Check the connector between RS/Y-relay CN247-relay CN265-MFPB CN4E for proper connection and correct as necessary.
- RS/C, RS/M, RS/Y I/O check, sensor check
- Control signal: MFPB CN4E<B>-6 (RS/C), MFPB CN4E<B>-8 (RS/M), MFPB CN4E<B>-10 (RS/Y)
- Location of electrical component: 16 to 17-C
- Replace the corresponding imaging unit. (Part# A9K70ED)
- Replace MFPB. (Part# A8JEH02002)
- Replace the sub hopper unit. (Part# A2X0R71433)
L.3.9.13 (Link to the Field Service Manual)