C2553 (bizhub C287/C227)

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Contents

Trouble type	C2553: Abnormally low toner density detected magenta 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

1. Perform image troubleshooting procedure if image density is low.
2. Reinstall the imaging unit.
3. Reinstall the developing unit/K.
4. Reinstall the toner cartridge.
5. 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.
6. M10 operation check
   • Control signal: MFPB CN26E-1 to 4
   • Location of electrical component: 20-J
7. M7, M9 operation check
   • Control signal: MFPB CN28E-1 to 4 (M7), MFPB CN28E-5 to 8 (M9)
   • Location of electrical component: 19-J
8. If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them.
9. Replace the the corresponding imaging unit. (Part# A85Y0ED)
10. Replace MFPB.(Part# A797H02118)

NOTICE

• Link to the wiring diagram (bizhub C287/C227)

K.3.9.5 (Link to the Field Service Manual)