Canon imageRUNNER ADVANCE 4551i Service Manual page 411

280-0102-04
Detection Description
Remedy
302-0001-04
Detection Description
Remedy
302-0002-04
Detection Description
Remedy
302-0101-04
Detection Description
Remedy
Communication error
Disconnection of FFC between the Reader Controller PCB and the DADF Scanner Unit was
detected.
[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
Error in paper front white shading
An access error to the paper front white shading RAM or a paper front white shading value out of
specification 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
Error in paper front black shading
An access error to the paper front black shading RAM or a paper front black shading value out of
specification 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
Error in paper back white shading
An access error to the paper back white shading RAM or a paper back white shading value out of
specification was detected.
[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
398
7. Error/Jam/Alarm