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C2557 (bizhub C287/C227)
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Contents
| Trouble type | C2557: Abnormally low toner density detected black TCR sensor |
| Rank | B |
| Trouble detection condition | A TC ratio of a predetermined value (2.5 %) or less is detected consecutively a predetermined number of times. |
| Trouble isolation | – |
| Relevant electrical parts | -Imaging unit/Y,M,C -Developing unit/K -Toner cartridge/Y,M,C,K -Toner empty sensor/Y (PS34) -Toner empty sensor/M (PS33) -Toner empty sensor/C (PS32) -Toner empty sensor/K (PS31) -Toner cartridge motor (M10) -Toner supply motor/Y,M (M9) -Toner supply motor/C,K (M7) -MFP board (MFPB) |
Procedure
- Perform image troubleshooting procedure if image density is low.
- Reinstall the imaging unit.
- Reinstall the developing unit/K.
- Reinstall the toner cartridge.
- Check the connector between the imaging unit or developing unit/K-relay CN161,CN162,CN163,CN164-relay CN15-MFPB CN18E for proper connection and correct as necessary.
- M10 operation check
- Control signal: MFPB CN26E-1 to 4
- Location of electrical component: 20-J
- M7, M9 operation check
- Control signal: MFPB CN28E-1 to 4 (M7), MFPB CN28E-5 to 8 (M9)
- Location of electrical component: 19-J
- If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them.
- Replace the developing unit/K. (Part# A85Y03D)
- Replace MFPB.(Part# A797H02118)
NOTICE
- Link to the wiring diagram (bizhub C287/C227)
K.3.9.5 (Link to the Field Service Manual)