Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 394 / 987

E020-02B8-05 ATR Sensor (M) output error
Detection Description a. The output value of the ATR Sensor (M) in the Drum Unit (M) did not fall within the range from
10 or higher to 990 or less for 2 consecutive times at initialization.
b. The output value did not exceed 140 although the control voltage of the ATR Sensor (M) in the
Drum Unit (M) was increased to 248 or higher, or it did not fall below 140 although the voltage was
decreased to 8 at initialization.
Remedy
[Related parts] R1.00
- Harness between the ATR Sensor (M) (UN35/J6022) and the Drum Unit Memory PCB (M) (UN13/
J6012)
- Harness between the DC Controller PCB (UN04/J160) and the Drum Unit Relay PCB (M) (UN09/
J6002)
- ATR Sensor (M) (UN35)
- Drum Unit (M)
- DC Controller PCB (UN04)
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. If the Drum Unit Memory PCB (M) 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
E020-02C0-05 Error in take-up of Sealing Member (M)
Detection Description The patch output value (SigR) failed to be 230 or less during initialization of the Drum Unit (M).
Remedy [Remedy] Check/replace the Drum Unit (M).
E020-02F0-05 Error in toner density (M) at communication failure of the Drum Unit Memory PCB (M)
Detection Description Communication between the DC Controller PCB and the Drum Unit Memory PCB (M) was not
available, and the output value (SigR) of the ATR Sensor (M) did not fall within the range from 50
or higher to 800 or less for 2 consecutive times.
Remedy [Related parts] R1.00
- Harness between the DC Controller PCB (UN04/J160) and the Drum Unit Relay PCB (M) (UN09/
J6002)
- Drum Unit (M)
- DC Controller PCB (UN04)
[Remedy] Perform the following in the order while checking whether the error is cleared.
1. If the Drum Unit Memory PCB (M) 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
E020-03A8-05 ATR Sensor (C) output error
Detection Description The output value of the ATR Sensor (C) in the Drum Unit (C) did not fall within the range from 10
or higher to 990 or less for 2 consecutive times during printing.
Remedy [Related parts] R1.00
- Harness between the ATR Sensor (C) (UN36/J6023) and the Drum Unit Memory PCB (C) (UN14/
J6013)
- Harness between the DC Controller PCB (UN04/J162) and the Drum Unit Relay PCB (C) (UN10/
J6003)
- ATR Sensor (C) (UN36)
- Drum Unit (C)
- DC Controller PCB (UN04)
[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
7. Error/Jam/Alarm
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