Canon imageRUNNER ADVANCE 4551i Service Manual page 403

110-0001-05
Detection Description
Remedy
110-0002-05
Detection Description
Remedy
110-0003-05
Detection Description
Remedy
Failure of the Polygon Motor (M11)
The Polygon Motor (M11) speed lock signal does not indicate a locked state a specific period of
time after the Polygon Motor (M11) has been started.
* The same condition is detected after the error retry is performed.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J324,J9324) to the Laser Scanner Unit
(J745/J744/J9744/J602/J9602)
- Laser Scanner Unit
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.Replace the Laser Scanner Unit.
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
Failure of the Polygon Motor (M11)
The speed lock signal indicates a deviation 10 times in sequence at intervals of 100 msec after
the signal has indicated a locked state.
* The same condition is detected after the error retry is performed.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J324,J9324) to the Laser Scanner Unit
(J745/J744/J9744/J602/J9602)
- Laser Scanner Unit
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.Replace the Laser Scanner Unit.
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
Failure of the Polygon Motor (M11)
The Polygon Motor (M11) speed lock signal does not indicate a locked state for 6.5 sec. after a
switchover is made from low to normal speed or for 8 sec. after a switchover is made from normal
to low speed.
* The same condition is detected after the error retry is performed.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J324,J9324) to the Laser Scanner Unit
(J745/J744/J9744/J602/J9602)
- Laser Scanner Unit
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.Replace the Laser Scanner Unit.
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
390
7. Error/Jam/Alarm