• Code: E020 04B8
• Description: ATR Sensor (Bk) output error. The output value did not exceed 120 although the control voltage of the ATR Sensor (Bk) in the Developing Unit (Bk) was increased to 192 or higher, or it did not fall below 120 although the voltage was decreased to 42 at initialization.
• Remedy: [Related parts] • Harnesses from the ATR Sensor (Bk) to the DC Controller PCB 1. ATR Sensor (Bk) (UN24/J1053) to Developing Unit (Bk) (J1043) (Unit of replacement: CABLE, DEVELOPING) 2. Developing Unit (Bk) (J1043) to Relay Connector (4P) (Unit of replacement: CABLE, RELAY) 3. Relay Connector (4P) to DC Controller PCB (UN04/J128) (Unit of replacement: CABLE, SENSOR) • Developing Unit (Bk) (Unit of replacement: DEVELOPING ASSEMBLY, BK) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Remedy] 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 0001
• Description: Developing Motor error. It did not become the specified speed for 0.5 consecutive sec although 0.8 sec have passed from the startup of the Developing Motor
• Remedy: [Related parts] • Harness between the Developing Motor (M10/J1190) and the DC Controller PCB (UN04/J129) (Unit of replacement: CABLE, MAIN DRIVE) • Main Drive Unit (Unit of replacement: MAIN DRIVE ASSEMBLY) • Fuse in the Low Voltage Power Supply PCB (UN01) (Unit of replacement: POWER SUPPLY ASSEMBLY) • Developing Motor (M10) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [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 Low Voltage Power Supply 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 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

• Code: E021 0002
• Description: Developing Motor error. The specified speed could not be maintained for 0.5 consecutive sec although it became the specified speed at least once from the startup of the Developing Motor.
• Remedy: [Related parts] • Harness between the Developing Motor (M10/J1190) and the DC Controller PCB (UN04/J129) (Unit of replacement: CABLE, MAIN DRIVE) • Main Drive Unit (Unit of replacement: MAIN DRIVE ASSEMBLY) • Fuse in the Low Voltage Power Supply PCB (UN01) (Unit of replacement: POWER SUPPLY ASSEMBLY) • Developing Motor (M10) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [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 Low Voltage Power Supply 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 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

• Code: E021 0120
• Description: Developing Screw rotation detection error (Y). The difference between the maximum and the minimum of sampling values detected by the ATR Sensor (Y) in the Developing Unit (Y) was 12 V or less during rotation of the Developing Screw.
• Remedy: [Related parts] • Harnesses from the ATR Sensor (Y) to the DC Controller PCB 1. ATR Sensor (Y) (UN21/J1050) to Developing Unit (Y) (J1040) (Unit of replacement: CABLE, DEVELOPING) 2. Developing Unit (Y) (J1040) to Relay Connector (4P) (Unit of replacement: CABLE, RELAY) 3. Relay Connector (4P) to DC Controller PCB (UN04/J128) (Unit of replacement: CABLE, SENSOR) • Developing Unit (Y) (Unit of replacement: DEVELOPING ASSEMBLY, Y) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) • Main Drive Unit (Unit of replacement: MAIN DRIVE ASSEMBLY) [Remedy] 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
• Description: Developing Screw rotation detection error (M). The difference between the maximum and the minimum of sampling values detected by the ATR Sensor (M) in the Developing Unit (M) was 12 V or less during rotation of the Developing Screw
• Remedy: [Related parts] • Harnesses from the ATR Sensor (M) to the DC Controller PCB 1. ATR Sensor (M) (UN22/J1051) to Developing Unit (M) (J1041) (Unit of replacement: CABLE, DEVELOPING) 2. Developing Unit (M) (J1041) to Relay Connector (4P) (Unit of replacement: CABLE, RELAY) 3. Relay Connector (4P) to DC Controller PCB (UN04/J128) (Unit of replacement: CABLE, SENSOR) • Developing Unit (M) (Unit of replacement: DEVELOPING ASSEMBLY, M) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) • Main Drive Unit (Unit of replacement: MAIN DRIVE ASSEMBLY) [Remedy] 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
• Description: Developing Screw rotation detection error (C). The difference between the maximum and the minimum of sampling values detected by the ATR Sensor (C) in the Developing Unit (C) was 12 V or less during rotation of the Developing Screw.
• Remedy: [Related parts] • Harnesses from the ATR Sensor (C) to the DC Controller PCB 1. ATR Sensor (C) (UN23/J1052) to Developing Unit (C) (J1042) (Unit of replacement: CABLE, DEVELOPING) 2. Developing Unit (C) (J1042) to Relay Connector (4P) (Unit of replacement: CABLE, RELAY) 3. Relay Connector (4P) to DC Controller PCB (UN04/J128) (Unit of replacement: CABLE, SENSOR) • Developing Unit (C) (Unit of replacement: DEVELOPING ASSEMBLY, C) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) • Main Drive Unit (Unit of replacement: MAIN DRIVE ASSEMBLY) [Remedy] 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
• Description: Developing Screw rotation detection error (Bk). The difference between the maximum and the minimum of sampling values detected by the ATR Sensor (Bk) in the Developing Unit (Bk) was 12 V or less during rotation of the Developing Screw.
• Remedy: [Related parts] • Harnesses from the ATR Sensor (Bk) to the DC Controller PCB 1. ART Sensor (Bk) (UN24/J1053) to Developing Unit (Bk) (J1043) (Unit of replacement: CABLE, DEVELOPING) 2. Developing Unit (Bk) (J1043) to Relay Connector (4P) (Unit of replacement: CABLE, RELAY) 3. Relay Connector (4P) to DC Controller PCB (UN04/J128) (Unit of replacement: CABLE, SENSOR) • Developing Unit (Bk) (Unit of replacement: DEVELOPING ASSEMBLY, BK) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) • Main Drive Unit (Unit of replacement: MAIN DRIVE ASSEMBLY) [Remedy] 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
• Description: Bottle Motor error (Y). The Toner Supply Sensor (Y) did not detect change for 1 sec or longer while the Bottle Motor (YM) was rotated at toner supply.
• Remedy: [Related parts] • Harnesses from the Bottle Motor (YM) to the DC Controller PCB 1. Bottle Motor (YM) (M04) to Relay Connector (2P) (Unit of replacement: CABLE, BOTTLE DRIVE MOTOR) 2. Relay Connector (2P) to DC Controller PCB (UN04/J127) (Unit of replacement: CABLE, TONER BOTTLE) • Harness between the Toner Supply Sensor (Y) (PS26/J1059) and DC Controller PCB (UN04/J127) (Unit of replacement: CABLE, TONER BOTTLE) • Toner Supply Sensor (Y) • Bottle Drive Unit (YM) (Unit of replacement: BOTTLE DRIVE ASSEMBLY, Y, M) • DC Controller PCB (UN04) (Unit of replacement: DC CONTROLLER PCB ASSEMBLY) [Remedy] 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