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C255C (bizhub C554e/C454e)
(1)Contents
| Trouble type | Black TCR sensor adjustment failure |
| Trouble code | C255C: Black TCR sensor adjustment failure |
| Rank | B |
| Detection timing | TCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value. |
| Trouble isolation | – |
| Relevant electrical parts | • Developing unit/Y,M,C,K • Toner bottle motor (M10) • Toner supply motor/K (M6) • Front side board (FRB) • Printer control board (PRCB) |
(2)Procedure
| Step | Action | Control signal | Location of electrical components |
| 1 | Reinstall developing unit | – | – |
| 2 | Check the connector between developing unit-FRB CN13, CN14, CN15, CN16 for proper connection and correct as necessary. | – | – |
| 3 | Check the connector between FRB CN1, CN3-PRCB CN7, CN9 for proper connection and correct as necessary. | – | – |
| 4 | M10 operation check | PRCB CN14-13 to 16 | 18-C |
| 5 | M6, M7, M8, M9 operation check | PRCB CN14-17 to 20 (M6) PRCB CN14-9 to 12 (M7) PRCB CN14-5 to 8 (M8) PRCB CN14-1 to 4 (M9) | 17 to 18-C |
| 6 | Replace the developing unit (Part# A2XN03D ) | – | – |
| 7 | Replace FRB (Part# A7PUH00500) | – | – |
| 8 | Replace PRCB (C554e Part# A5AYH00101 / C454e Part# A5C0H00101) | – | – |
- Link to the wiring diagram (N.1. bizhub C554e/C454e)
- Link to the layout drawings for related parts by each trouble code (S.73. C255C)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
K.3.7.9 (Link to the Field Service Manual)