• Code: 020-5024-05
• Description: C-color patch density lower limit error
• Causes: It was detected that the ATR patch detected value (SigD) was 100 or less when executing the initial installation mode of the Developing Assembly (C) (COPIER> FUNCTION> INSTALL> INISET-C).
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Multi Driver PCB (UN97) - Intermediate Transfer Belt - Developing Assembly (C) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Visually check if the Developing Assembly and the Drum Unit are properly installed. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. If the Intermediate Transfer Belt is soiled, execute the following: COPIER> FUNCTION> CLEANING> TBLT-CLN. 4. Check/replace the related harness/cable, connector and parts.

• Code: 020-5034-05
• Description: C-color patch density upper limit error
• Causes: It was detected that the ATR patch detected value (SigD) was 900 or more when executing the initial installation mode of the Developing Assembly (C) (COPIER> FUNCTION> INSTALL> INISET-C).
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Multi Driver PCB (UN97) - Intermediate Transfer Belt - Developing Assembly (C) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Visually check if the Developing Assembly and the Drum Unit are properly installed. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. If the Intermediate Transfer Belt is soiled, execute the following: COPIER> FUNCTION> CLEANING> TBLT-CLN. 4. Check/replace the related harness/cable, connector and parts.

• Code: 020-6024-05
• Description: M-color patch density lower limit error
• Causes: It was detected that the ATR patch detected value (SigD) was 100 or less when executing the initial installation mode of the Developing Assembly (M) (COPIER> FUNCTION> INSTALL> INISET-M).
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Multi Driver PCB (UN97) - Intermediate Transfer Belt - Developing Assembly (M) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Visually check if the Developing Assembly and the Drum Unit are properly installed. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. If the Intermediate Transfer Belt is soiled, execute the following: COPIER> FUNCTION> CLEANING> TBLT-CLN. 4. Check/replace the related harness/cable, connector and parts.

• Code: 020-6034-05
• Description: M-color patch density upper limit error
• Causes: It was detected that the ATR patch detected value (SigD) was 900 or more when executing the initial installation mode of the Developing Assembly (M) (COPIER> FUNCTION> INSTALL> INISET-M).
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Multi Driver PCB (UN97) - Intermediate Transfer Belt - Developing Assembly (M) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Visually check if the Developing Assembly and the Drum Unit are properly installed. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. If the Intermediate Transfer Belt is soiled, execute the following: COPIER> FUNCTION> CLEANING> TBLT-CLN. 4. Check/replace the related harness/cable, connector and parts.

• Code: 020-7024-05
• Description: Y-color patch density lower limit error
• Causes: It was detected that the ATR patch detected value (SigD) was 100 or less when executing the initial installation mode of the Developing Assembly (Y) (COPIER> FUNCTION> INSTALL> INISET-Y).
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Multi Driver PCB (UN97) - Intermediate Transfer Belt - Developing Assembly (Y) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Visually check if the Developing Assembly and the Drum Unit are properly installed. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. If the Intermediate Transfer Belt is soiled, execute the following: COPIER> FUNCTION> CLEANING> TBLT-CLN. 4. Check/replace the related harness/cable, connector and parts.

• Code: 020-7034-05
• Description: Y-color patch density upper limit error
• Causes: It was detected that the ATR patch detected value (SigD) was 900 or more when executing the initial installation mode of the Developing Assembly (Y) (COPIER> FUNCTION> INSTALL> INISET-Y).
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Multi Driver PCB (UN97) - Intermediate Transfer Belt - Developing Assembly (Y) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Visually check if the Developing Assembly and the Drum Unit are properly installed. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. If the Intermediate Transfer Belt is soiled, execute the following: COPIER> FUNCTION> CLEANING> TBLT-CLN. 4. Check/replace the related harness/cable, connector and parts.

• Code: 021-0101-05
• Description: Developing Sleeve Drive Motor (Y) error
• Causes: The lock signal of the Developing Sleeve Drive Motor (Y) could not be detected within the specified period of time.
• Remedy: [Related parts] R1.00 - Harness between the Drum Driver PCB (UN6/J1910) and the Developing Sleeve Drive Motor (Y) (M20/J7535) - Developing Sleeve Drive Motor (Y) (M20) - Developing Assembly (Y) - Drum Driver PCB (UN6) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 021-0102-05
• Description: Developing Sleeve Drive Motor (Y) error
• Causes: The Developing Sleeve Drive Motor (Y) was unlocked although it had been locked once.
• Remedy: [Related parts] R1.00 - Harness between the Drum Driver PCB (UN6/J1910) and the Developing Sleeve Drive Motor (Y) (M20/J7535) - Developing Sleeve Drive Motor (Y) (M20) - Developing Assembly (Y) - Drum Driver PCB (UN6) [Remedy] Check/replace the related harness/cable, connector and parts.