Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 399 / 987

E021-0320-05 Developing Screw rotation detection error (C)
Detection Description The difference between the maximum and the minimum of sampling values detected by the ATR
Sensor (C) in the Drum Unit (C) was 0.5 V or less.
Remedy
[Related parts] R1.00
- Harness between the Drum Unit Relay PCB (C) (UN10/J6003) and the DC Controller PCB (UN04/
J162)
- Drum Unit Relay PCB (C) (UN10)
- Drum Unit Memory PCB (C)
- Drum Unit (C)
- DC Controller PCB (UN04)
- Main Drive Unit
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. If the Drum Unit Memory PCB (C) is soiled, clean it with a blower.
2. Check/replace the related harness/cable, connector and parts.
[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
E021-0420-05 Developing Screw rotation detection error (Bk)
Detection Description The difference between the maximum and the minimum of sampling values detected by the ATR
Sensor (Bk) in the Drum Unit (Bk) was 0.5 V or less.
Remedy [Related parts] R1.00
- Harness between the Drum Unit Relay PCB (Bk) (UN11/J6004) and the DC Controller PCB
(UN04/J162)
- Drum Unit Relay PCB (Bk) (UN11)
- Drum Unit Memory PCB (Bk) (UN15)
- Drum Unit (Bk)
- DC Controller PCB (UN04)
- Main Drive Unit
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. If the Drum Unit Memory PCB (Bk) is soiled, clean it with a blower.
2. Check/replace the related harness/cable, connector and parts.
[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
E025-0110-05 Bottle Motor (YM) error (Y)
Detection Description The Bottle Rotation Sensor (Y) did not detect rotation for 5 times in a row although 1.5 sec (2 sec
in the case of right before replacement of the Toner Container) has passed after the Bottle Motor
(YM) was turned ON.
Remedy [Related parts] R1.00
- Harness between the DC Controller PCB (UN04/J155) and the Bottle Motor (YM) (M09/J6301)
- Harness between the DC Controller PCB (UN04/J151) and the Bottle Rotation Sensor (Y) (PS06/
J5301)
- Bottle Rotation Sensor (Y) (PS06)
- Bottle Drive Unit (YM)
- Toner Container (Y)
- Hopper Unit (Y)
- DC Controller PCB (UN04)
[Remedy] Check/replace the related harness/cable, connector and parts.
[CAUTION] Be sure to turn over the Door Lock Lever when removing the Bottle Drive Unit (YM)
and rotating the drive section by hand.
[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
7. Error/Jam/Alarm
388