C2553 (bizhub C754/C654)
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Contents
| Trouble type | Abnormally low toner density detected magenta TCR sensor |
| Trouble code | C2553 |
| Rank | B |
| Detection timing | When sampling data is determined in TC ratio calculation control, TCR sensor output is higher than a predetermined value for a predetermined number of times in a row even though there is toner in the sub hopper. |
| Trouble isolation | – |
| Relevant electrical parts | -Imaging unit /C -Imaging unit /M -Imaging unit /Y -Toner cartridge /C -Toner cartridge /M -Toner cartridge /Y -Toner empty sensor/C (RS/C) -Toner empty sensor/M (RS/M) -Toner empty sensor/Y (RS/Y) -Toner supply motor/Y (M9) -Toner supply motor/M (M10) -Toner supply motor/C (M11) -Toner cartridge motor /YM (M13) -Toner cartridge motor /CK (M14) -Printer control board (PRCB) |
(2)Procedure
| Step | Action | Control signal | Location of electrical components |
| 1 | Perform image troubleshooting procedure if image density is low. | – | – |
| 2 | Reinstall imaging unit. | – | – |
| 3 | Reinstall toner cartridge. | – | – |
| 4 | Check the motor connector for proper connection and correct as necessary. | – | – |
| 5 | Check the connector of M9, M10, M11, M13, M14 for proper drive coupling and correct as necessary. | – | – |
| 6 | M9, M10, M11 operation check(At this time, IU must be non-installation.) | M9: PRCB CN3-1 to 4M10: PRCB CN3-5 to 8M11: PRCB CN3-9 to 12 | 23 to 24-C |
| 7 | M13, M14 operation check | M13: PRCB CN4-1 to 4M14: PRCB CN4-5 to 8 | 3-K |
| 8 | Replace M9 (Part# A00JM12100), M10 (Part# A00JM12100, M11 (Part# A00JM12100), M13 (Part# 9314130021), M14 (Part# 9314130021) | – | – |
| 9 | If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them. | – | – |
| 10 | Replace imaging unit. (C Part# A2X20KD, M Part# A2X20ED, Y Part# A2X208D) | – | – |
| 11 | PRCB ICP23 or ICP24 conduction check | – | – |
| 12 | Replace PRCB. (Part# A2X0H00102) | – | – |
- Link to the wiring diagram (N.1. bizhub C754/C654)
- Link to the layout drawings for related parts by each trouble code (S.63. C2551, C2553, C2555)
K.3.7.14 (Link to the Field Service Manual)