• Code: 391.421
• Description: Drum Cartridge M Near Life. It was detected that the replacement timing for the Imaging Unit (M) is closer than Pre Near.
• Remedy: The Imaging Unit (M) needs to be replaced soon. Replace the Imaging Unit (M) as required.

• Code: 391.431
• Description: Drum Cartridge C Near Life. It was detected that the replacement timing for the Imaging Unit (C) is closer than Pre Near.
• Remedy: The Imaging Unit (C) needs to be replaced soon. Replace the Imaging Unit (C) as required.

• Code: 391.480
• Description: Drum Cartridge Y Life Over. Imaging Unit (Y) has reached the end of its life span.
• Remedy: Replace the Imaging Unit (Y).

• Code: 391.481
• Description: Drum Cartridge M Life Over. Imaging Unit (M) has reached the end of its life span.
• Remedy: Replace the Imaging Unit (M).

• Code: 391.482
• Description: Drum Cartridge C Life Over. Imaging Unit (C) has reached the end of its life span.
• Remedy: Replace the Imaging Unit (C).

• Code: 391.910
• Description: Waste Toner Bottle Not In Position. The Waste Toner Bottle is not in the proper position.
• Remedy: Check that the Bottle Guide Assembly at the machine side and the Waste Toner Bottle does not have any deformation or foreign substances, and that they are installed properly. Is the Waste Toner Bottle installed properly? Y↓ N→Install the Waste Toner Bottle properly. If there is any deformation, replace the Waste Toner Bottle (PL 8.2) and Bottle Guide Assembly (PL 8.2 Item 1). Check the Waste Toner Bottle Position Sensor. Turn the power On and enter Service Diag mode (Entering Service Diagnostics). Enter dc330 Component Control [091-200]. Use a sheet of paper, etc. to block/clear the light path to the Waste Toner Bottle Position Sensor. Does the display change between High/Low? Y↓ N→Use Transmissive Sensor RAP to check the Waste Toner Bottle Position Sensor. Press the Stop button and turn the power Off. Replace the MCU PWB.

• Code: 391.911
• Description: Waste Toner Bottle Full. After the Waste Toner Bottle Near Full has occurred, the PV exceeds the threshold value.
• Remedy: Replace the Waste Toner Bottle (PL 8.2). If the problem persists, check the Waste Toner Bottle Full Sensor. Enter dc330 Component Control [091-201]. Use a sheet of paper, etc. to block/ clear the light path to the Waste Toner Bottle Full Sensor. Does the display change between High/Low? Y↓ N→Use Transmissive Sensor RAP to check the Waste Toner Bottle Full Sensor. Press the Stop button and turn the power Off. Replace the MCU PWB.

• Code: 391.913
• Description: Drum Cartridge K Life End. Imaging Unit (K) has reached the end of its life span.
• Remedy: Replace the Imaging Unit (K).