• Code: 026-0301-05
• Description: Developing Thermistor (C) high temperature detection error
• Causes: The Thermistor of the Toner Density Sensor (C) detected 70 deg C or higher.
• 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) - Developing Assembly (C) - Side Driver PCB (UN96) [Remedy] Perform the following in the order while checking whether the error is cleared. a. If you touch the Toner Density Sensor (C) of the Developing Assembly (C) and it is cooled down, check/replace the related harness/cable, connector and parts. b. If you touch the Toner Density Sensor (C) of the Developing Assembly (C) and it is still warm, or if the error does not occur during a service visit but is found in the log: - Clean the cooling suction/exhaust fans in the developing system as well as ducts and filters. - If the space behind the host machine is less than 10 cm, ask the user to secure enough space.

• Code: 026-0302-05
• Description: Developing Thermistor (C) low temperature detection error
• Causes: The Thermistor of the Toner Density Sensor (C) detected 35 deg C 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) - Developing Assembly (C) - Side Driver PCB (UN96) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 026-0401-05
• Description: Developing Thermistor (Bk) high temperature detection error
• Causes: The Thermistor of the Toner Density Sensor (Bk) detected 70 deg C or higher.
• 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) (TS1) - Developing Assembly (Bk) - Side Driver PCB (UN96) [Remedy] Check/replace the related harness/cable, connector and parts. a. If you touch the Toner Density Sensor (Bk) of the Developing Assembly (Bk) and it is cooled down, check/replace the related harness/cable, connector and parts. b. If you touch the Toner Density Sensor (Bk) of the Developing Assembly (Bk) and it is still warm, or if the error does not occur during a service visit but is found in the log: - Clean the cooling suction/exhaust fans in the developing system as well as ducts and filters. - If the space behind the host machine is less than 10 cm, ask the user to secure enough space.

• Code: 026-0402-05
• Description: Developing Thermistor (Bk) low temperature detection error
• Causes: The Thermistor of the Toner Density Sensor (Bk) detected 35 deg C 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) (TS1) - Developing Assembly (Bk) - Side Driver PCB (UN96) [Remedy] Check/replace the related harness/cable, connector and parts.

• Code: 029-1000-05
• Description: Patch Sensor error
• Causes: The Patch Sensor detected correction error of the light intensity value determined at initialization.
• 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) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 2. Check/replace the related harness/cable, connector and parts.

• Code: 029-1001-05
• Description: Patch Sensor error
• Causes: An error was detected in P-wave light intensity value read by ITB background sampling.
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Intermediate Transfer Belt - Multi Driver PCB (UN97) [Remedy] Perform the following in the order while checking whether the error is cleared. 1. Check that the Intermediate Transfer Belt is free of damage and foreign matter. 2. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. 3. Check/replace the related harness/cable, connector and parts.

• Code: 029-6000-05
• Description: Patch Sensor error
• Causes: An upper limit error in the light intensity of the Patch Sensor was detected when executing the initial installation mode of the Developing Assembly.
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Intermediate Transfer Belt - Multi Driver PCB (UN97) [Remedy] Perform the following in the order while checking whether the error is cleared. - Check the value in COPIER> ADJUST>DENS >BASE-T. a. If the value of BASE-T is "1023", a-1. Execute COPIER> FUNCTION> SENS-ADJ> PCHINITC. a-2. Enter the value of "BASE-T" written on the service label in COPIER> ADJUST> DENS> BASET. a-3. Enter the value of "BASE-T" in COPIER> ADJUST> DENS> ALF-ATR. a-4. Initialize the Developing Assembly. b. If the value of BASE-T is not "1023", b-1. If the sensor surface of the Patch Sensor is soiled, clean it with a cloth tightly wrung out of water. b-2. Check/replace the related harness/cable, connector and parts.

• Code: 029-6008-05
• Description: Patch Sensor error
• Causes: An error due to variation in light intensity value of the Patch Sensor was detected when executing the initial installation mode of the Developing Assembly.
• Remedy: [Related parts] R1.00 - Harness between the Multi Driver PCB (UN97/J1353) and the Patch Sensor (PS21/J7412) - Patch Sensor (PS21) - Intermediate Transfer Belt - Multi Driver PCB (UN97) [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.