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C2557 (bizhub 554e/454e)
Contents
| Trouble type | Abnormally low toner density detected black TCR sensor |
| Trouble code | C2557 |
| 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 | • Developing unit • Toner cartridge • Toner empty switch/K (PS31) • 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 | Perform image troubleshooting procedure if image density is low. | – | – |
| 2 | Reinstall developing unit | – | – |
| 3 | Reinstall toner cartridge | – | – |
| 4 | Check the connector between developing unit-FRB CN13 for proper connection and correct as necessary. | – | – |
| 5 | Check the connector between FRB CN1, CN3-PRCB CN7, CN9 for proper connection and correct as necessary. | – | – |
| 6 | M10 operation check | PRCB CN14-1 to 4 | 17-C |
| 7 | M6 operation check | PRCB CN14-5 to 8 | 17-C |
| 8 | If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them. | – | – |
| 9 | Replace the developing unitDeveloper 554e/454e (Part# A2XN03D) | – | – |
| 10 | Replace FRBFRB (Part# A61FH00500) | – | – |
| 11 | Replace PRCBPRCB (Part# 554e A61DH00101 454e A61EH00101) | – | – |
- Link to the wiring diagram (N.1. bizhub 554e/454e)
- Link to the layout drawings for related parts by each trouble code (S.60. C2557)
Document Information ID D0001134348 Revise ID R000003
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
K.3.7.4 (Link to the Field Service Manual)