Canon imageRUNNER ADVANCE 4551i Service Manual page 401

020-0000-05
Detection Description
Remedy
024-0000-05
Detection Description
Remedy
024-0001-05
Detection Description
Remedy
The path between the sub hopper and the developing assembly is clogged with toner.
The Developing Assembly Toner Level Sensor (S25) detects the absence of toner, while the
Developing Assembly Toner Level Sensor (S51) detects the presence of toner.
* Error occurs after the delivery if a paper in passage exists.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J301) to the Developing Assembly Toner
Level Sensor (S25/J25)
- Harness connecting from the DC Controller PCB (UN2/J333) to the Developing Assembly Toner
Level Sensor (S51/J44)
- Developing Assembly Toner Level Sensor (S25)
- Developing Assembly Toner Level Sensor (S51)
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.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
The connector of Developing Assembly Toner Level Sensor (S25) is disconnected.
The Developing Assembly Toner Level Sensor (S25) connection detection signal is absent for 100
msec 10 times in sequence.
* Error occurs after the delivery if a paper in passage exists.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J301) to the Developing Assembly Toner
Level Sensor (S25/J25)
- Developing Assembly Toner Level Sensor (S25)
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.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
The Developing Assembly Toner Level Sensor (S25) is disconnected.
<At LOW SPEED>
- The Developing Assembly Toner Level Sensor (S25) ON counter is checked every 2.5 seconds,
and the counter increments 1 count every 25 times when the sensor goes on, and 300 counts are
reached.
<At HIGH SPEED>
- The Developing Assembly Toner Level Sensor (S25) ON counter is checked every 1.5 seconds,
and the counter increments 1 count every 15 times when the sensor goes on, and 300 counts are
reached.
[Related parts]
- Harness connecting from the DC Controller PCB (UN2/J301) to the Developing Assembly Toner
Level Sensor (S25/J25)
- Developing Assembly Toner Level Sensor (S25)
- DC Controller PCB (UN2)
[Remedy]
1.Check/replace the related harness/cable, connector and parts.
2.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
388
7. Error/Jam/Alarm