Canon imageRUNNER ADVANCE 4551i Service Manual page 410

261-0000-05
Detection Description
Remedy
280-0001-04
Detection Description
Remedy
280-0002-04
Detection Description
Remedy
280-0101-04
Detection Description
Remedy
Error in Zero Cross
Zero Cross failed to be detected for 500ms or more while the relay was ON.
* The same condition is detected after the error retry is performed.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J303) to the AC Driver PCB (UN30/J116)
- AC Driver PCB (UN30)
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.Replace the AC Driver PCB.
3.Replace the DC Controller PCB.
[Reference]
Before replacing the DC Controller PCB, back up the service mode data and restore the backup
data after the replacement so the data may be able to be protected.
- Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES
Communication error
Communication between the Reader Controller PCB and the Reader Scanner Unit was not
completed within the specified period of time.
[Related parts] R1.00
- Harness between the Reader Scanner Unit (UN_BO2/J101 ) and the Reader Controller PCB
(UN_BO1/J105)
- Reader Scanner Unit (UN_BO2)
- Reader Controller PCB (UN_BO1)
[Remedy] Check/replace the related harness/cable, connector and parts.
[Reference] Before replacing the Reader Controller PCB, back up the service mode data (approx.
2 min) and restore the backup data after the replacement so the data may be able to be protected.
- Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> RSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> RSRAMRES
Communication error
Disconnection of FFC between the Reader Controller PCB and the Reader Scanner Unit was
detected.
[Related parts] R1.00
- Harness between the Reader Scanner Unit (UN_BO2/J101 ) and the Reader Controller PCB
(UN_BO1/J105)
- Reader Scanner Unit (UN_BO2)
- Reader Controller PCB (UN_BO1)
[Remedy] Check/replace the related harness/cable, connector and parts.
[Reference] Before replacing the Reader Controller PCB, back up the service mode data (approx.
2 min) and restore the backup data after the replacement so the data may be able to be protected.
- Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> RSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> RSRAMRES
Communication error
Communication between the Reader Controller PCB and the DADF Scanner Unit was not
completed within the specified period of time.
[Related parts] R1.00
- Harness between the Reader Controller PCB (UN_BO1/J103) and the DADF Driver PCB (PCB1/
J401)
- DADF Driver PCB (PCB1)
- Reader Controller PCB (UN_BO1)
[Remedy] Check/replace the related harness/cable, connector and parts.
[Reference] Before replacing the Reader Controller PCB, back up the service mode data (approx.
2 min) and restore the backup data after the replacement so the data may be able to be protected.
- Backup: COPIER (LEVEL2)> FUNCTION> SYSTEM> RSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> RSRAMRES
397
7. Error/Jam/Alarm