Canon imageRUNNER ADVANCE C255 Series Service Manual page 389

E010-0003-05
Detection Description
Remedy
E012-0001-05
Detection Description
Remedy
Bk Drum_ITB Motor error
There was no FG signal input for 300 msec from the startup of the Bk Drum_ITB Motor in the Main
Drive Unit.
[Related parts] R1.00
- Harness between the Bk Drum_ITB Motor (M02/J5702) and the DC Controller PCB (UN04/J140)
- Fuse in the Low-voltage Power Supply PCB (UN01/FU14)
- Bk Drum_ITB Motor (M02)
- Main Drive Unit
- Low-voltage Power Supply PCB (UN01)
- DC Controller PCB (UN04)
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. Check whether the gears of the Main Drive Unit can be rotated by hand.
a. If they cannot be rotated, replace the Main Drive Unit.
b. If they can be rotated, check the harnesses from the Bk Drum_ITB Motor to the DC Controller
PCB.
2. Measure the both ends of the fuse in the Low-voltage Power Supply PCB using a tester.
a. If power is flowing to it (the measurement value is less than 1 ohm),
1. Replace the Bk Drum_ITB Motor.
2. Replace the DC Controller PCB.
b. If the power is not flowing to it (the measurement value is 1 ohm or higher), replace the Low-
voltage Power Supply PCB.
[Reference] Before replacing the DC 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> DSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES
CL Drum Motor error
It did not become the specified speed for 500 consecutive msec although 1000 msec have passed
from the startup of the CL Drum Motor in the Main Drive Unit. (The detection timing varies
depending on the paper feed conditions.)
[Related parts] R1.00
- Harness between the CL Drum Motor (M01/J5701) and the DC Controller PCB (UN04/J140)
- Fuse in the Low-voltage Power Supply PCB (UN01/FU14)
- CL Drum Motor (M01)
- Main Drive Unit
- Low-voltage Power Supply PCB (UN01)
- DC Controller PCB (UN04)
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. Check whether the gears of the Main Drive Unit can be rotated by hand.
a. If they cannot be rotated, replace the Main Drive Unit.
b. If they can be rotated, check the harness between the CL Drum Motor and the DC Controller
PCB.
2. Measure the both ends of the fuse in the Low-voltage Power Supply PCB using a tester.
a. If power is flowing to it (the measurement value is less than 1 ohm),
1. Replace the CL Drum Motor.
2. Replace the DC Controller PCB.
b. If the power is not flowing to it (the measurement value is 1 ohm or higher), replace the Low-
voltage Power Supply PCB.
[Reference] Before replacing the DC 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> DSRAMBUP
- Restoration: COPIER (LEVEL2)> FUNCTION> SYSTEM> DSRAMRES
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7. Error/Jam/Alarm