• Code: 020-02A8-05
• Description: Toner Density Sensor (M) output upper/lower limit error
• Causes: Output (Vsig_ind) of the Toner Density Sensor (M) showed 245 or higher or 10 or lower once during operation.
• Remedy: [Related parts] R1.00 - Harness between the Side Driver PCB (UN96/J1305) and the Toner Density Sensor (M) (TS3/ J9014) - Toner Density Sensor (M) (TS3) - Side Driver PCB (UN96) - Developing Assembly (M) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 020-02B8-05
• Description: Toner Density Sensor (M) output upper/lower limit error
• Causes: When executing the initial installation mode of the Developing Assembly (M) (COPIER> FUNCTION> INSTALL> INISET-M), output failed to reach 128 although the control voltage value of the Toner Density Sensor (M) reached 1023 or higher. Or output failed to reach 128 although the control voltage reached 220 or lower.
• Remedy: [Related parts] R1.00 - Harness between the Side Driver PCB (UN96/J1305) and the Toner Density Sensor (M) (TS3/ J9014) - Toner Density Sensor (M) (TS3) - Side Driver PCB (UN96) - Developing Assembly (M) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 020-03A8-05
• Description: Toner Density Sensor (C) output upper/lower limit error
• Causes: Output (Vsig_ind) of the Toner Density Sensor (C) showed 245 or higher or 10 or lower once during operation.
• Remedy: [Related parts] R1.00 - Harness between the Side Driver PCB (UN96/J1309) and the Toner Density Sensor (C) (TS4/ J9015) - Toner Density Sensor (C) (TS4) - Side Driver PCB (UN96) - Developing Assembly (C) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 020-03B8-05
• Description: Toner Density Sensor (C) output upper/lower limit error
• Causes: When executing the initial installation mode of the Developing Assembly (C) (COPIER> FUNCTION> INSTALL> INISET-C), output failed to reach 128 although the control voltage value of the Toner Density Sensor (C) reached 1023 or higher. Or output failed to reach 128 although the control voltage reached 220 or lower.
• Remedy: [Related parts] R1.00 - Harness between the Side Driver PCB (UN96/J1309) and the Toner Density Sensor (C) (TS4/ J9015) - Toner Density Sensor (C) (TS4) - Side Driver PCB (UN96) - Developing Assembly (C) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 020-04A8-05
• Description: Toner Density Sensor (Bk) output upper/lower limit error
• Causes: Output (Vsig_ind) of the Toner Density Sensor (Bk) showed 245 or higher or 10 or lower once during operation.
• Remedy: [Related parts] R1.00 - Harness between the Side Driver PCB (UN96/J1309) and the Toner Density Sensor (Bk) (TS1/ J9016) - Toner Density Sensor (Bk) - Side Driver PCB (UN96) - Developing Assembly (Bk) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 020-04B8-05
• Description: Toner Density Sensor (Bk) output upper/lower limit error
• Causes: When executing the initial installation mode of the Developing Assembly (Bk) (COPIER> FUNCTION> INSTALL> INISET-K), output failed to reach 128 although the control voltage value of the Toner Density Sensor (Bk) reached 1023 or higher. Or output failed to reach 128 although the control voltage reached 220 or lower.
• Remedy: [Related parts] R1.00 - Harness between the Side Driver PCB (UN96/J1309) and the Toner Density Sensor (Bk) (TS1/ J9016) - Toner Density Sensor (Bk) - Side Driver PCB (UN96) - Developing Assembly (Bk) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 020-4024-05
• Description: Bk-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 (Bk) (COPIER> FUNCTION> INSTALL> INISET-K).
• 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 (Bk) [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: 020-4034-05
• Description: Bk-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 (Bk) (COPIER> FUNCTION> INSTALL> INISET-K).
• 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 (Bk) [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.