C2155 (bizhub C759/C659)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
Contents
| Trouble type | C2155: Transfer belt contact fault after K pressure established |
| Rank | B |
| Trouble detection condition | The 1st transfer pressure sensor/K (PS51) is blocked or the 1st transfer pressure sensor/YMC (PS52) is unblocked after the lapse of a predetermined period of time after the K pressure sequence has been completed. |
| Trouble isolation | – |
| Relevant electrical parts | -Transfer belt unit -1st transfer pressure motor (M21) -1st transfer pressure sensor/K (PS51) -1st transfer pressure sensor/YMC (PS52) -Process drive board (PDB)MFP board (MFPB) |
Procedure
- Check the connector between M21-relay CN428-PDB CN7 for proper connection and correct as necessary.
- Check the connector of M21 for proper drive coupling and correct as necessary.
- Check the transfer roller pressure gear of the transfer belt unit for proper engagement and the roller for rolling operation, and correct any faulty motion.
- Check the connector between PS51-relay CN297-MFPB CN4E for proper connection and correct as necessary.
- Check the connector between PS52-relay CN297-MFPB CN4E for proper connection and correct as necessary.
- PS51 I/O check, sensor check
- Control signal: MFPB CN4E<A>-1 (ON)
- Location of electrical component: 15-C
- PS52 I/O check, sensor check
- Control signal: MFPB CN4E<A>-4 (ON)
- Location of electrical component: 15-C
- M21 load check
- Check code: 24
- Multi code: 1, 2, 3, 4
- Control signal: PDB CN7-5 to 8
- Location of electrical component: 17-P
- Replace M21. (Part# A02EM10C01)
- Replace the transfer belt unit. (Part# A8JER70111)
- PDB F2 conduction check
- Replace PDB. (Part# A8JEH00400)
- MFPB F2E conduction check
- Replace MFPB. (Part# A8JEH02002)
L.3.9.2 (Link to the Field Service Manual)