• Code: E021-0003-05
• Description: Developing Motor error
• Causes: There was no FG signal input for 300 msec from the startup of the Developing Motor.
• Remedy: [Related parts] R1.00 - Harness between the Developing Motor (M03/J5703) and the DC Controller PCB (UN04/J142) - Fuse in the DC Controller PCB (UN04/FU4) - Developing Motor (M03) - Main Drive Unit - 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 Developing Motor and the DC Controller PCB. 2. Measure the both ends of the fuse in the DC Controller PCB using a tester. a. If the measurement value is less than 1 ohm (conduction state), 1. Replace the Developing Motor. 2. Replace the DC Controller PCB. b. If the measurement value is 1 ohm or higher (non conduction state), replace the DC Controller 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

• Code: E021-0120-05
• Description: Developing Screw rotation detection error (Y)
• Causes: The difference between the maximum and the minimum of sampling values detected by the ATR Sensor (Y) in the Drum Unit (Y) was 0.5 V or less.
• Remedy: [Related parts] R1.00 - Harness between the Drum Unit Relay PCB (Y) (UN08/J6001) and the DC Controller PCB (UN04/ J160) - Drum Unit Relay PCB (Y) (UN08) - Drum Unit Memory PCB (Y) (UN12) - Drum Unit (Y) - 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 (Y) 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

• Code: E021-0220-05
• Description: Developing Screw rotation detection error (M)
• Causes: The difference between the maximum and the minimum of sampling values detected by the ATR Sensor (M) in the Drum Unit (M) was 0.5 V or less.
• Remedy: [Related parts] R1.00 - Harness between the Drum Unit Relay PCB (M) (UN09/J6002) and the DC Controller PCB (UN04/ J160) - Drum Unit Relay PCB (M) (UN09) - Drum Unit Memory PCB (M) (UN13) - Drum Unit (M) - 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 (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

• Code: E021-0320-05
• Description: Developing Screw rotation detection error (C)
• Causes: 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

• Code: E021-0420-05
• Description: Developing Screw rotation detection error (Bk)
• Causes: 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

• Code: E025-0110-05
• Description: Bottle Motor (YM) error (Y)
• Causes: 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

• Code: E025-0168-05
• Description: No toner detection error (Y)
• Causes: - The state without toner was detected although the recovery sequence was performed for 5 times after replacement of the Toner Container (Y). - The recovery sequence was repeated with no toner in the container.
• Remedy: [Related parts] R1.00 - Main Drive Unit - Hopper Unit (Y) - Toner Bottle Mount Unit (Y) - Drum Unit (Y) - Toner Container (Y) [Remedy] Be sure to perform the following procedure. 1. Shake the Toner Container 10 times, and then insert it into the host machine. 2. Check/replace the related harness/cable, connector and parts. [Reference] If a user inserts an empty Toner Container (Y) repeatedly, the error may occur.

• Code: E025-0210-05
• Description: Bottle Motor (YM) error (M)
• Causes: The Bottle Rotation Sensor (M) 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 (M) (PS07/ J5302) - Bottle Rotation Sensor (M) (PS07) - Bottle Drive Unit (YM) - Toner Container (M) - Hopper Unit (M) - 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