• Code: 392.678
• Description: ADC Mini Setup Fault [K]. The difference in densities among the ADC patches of K color is abnormal. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Enter dc122 Fault History. Check whether ADC Sensor Fail or ATC Fail [K] has occurred. Has Fail 392.651 or 392.315 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (K) for contamination • The 1st BTR (K) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (K) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (BCR) and the BCR (K) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (K) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (K) • HVPS (BCR) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP

• Code: 393.314
• Description: Y Disp Motor Fault. Regardless of low usage of toner from Y Toner Cartridge, it was detected to be empty.
• Remedy: 1. Turn the power Off and On. 2. Replace the Toner Cartridge (Y). If the problem persists, check the following: • The connectors of the MCU PWB P/J411 and the Toner CRUM Coupler (Y) P/J120 for damage, foreign substances, bent connector pins, burns, and improper soldering on the PWB • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler (Y) P/J120 for open circuit, short circuit, and poor contact • The Toner Dispense Motor (Y) (PL 5.1): dc330 Component Control [093-001] • The drive transmission path in the Dispense Assembly • The MCU PWB for failure.

• Code: 393.315
• Description: M Disp Motor Fault. Regardless of low usage of toner from M Toner Cartridge, it was detected to be empty.
• Remedy: 1. Turn the power Off and On. 2. Replace the Toner Cartridge (M). If the problem persists, check the following: • The connectors of the MCU PWB P/J411 and the Toner CRUM Coupler (M) P/J121 for damage, foreign substances, bent connector pins, burns, and improper soldering on the PWB • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler (M) P/J121 for open circuit, short circuit, and poor contact • The Toner Dispense Motor (M) (PL 5.1): dc330 Component Control [093-006] • The drive transmission path in the Dispense Assembly • The MCU PWB for failure.

• Code: 393.316
• Description: C Disp Motor Fault. Regardless of low usage of toner from C Toner Cartridge, it was detected to be empty.
• Remedy: 1. Turn the power Off and On. 2. Replace the Toner Cartridge (C). If the problem persists, check the following: • The connectors of the MCU PWB P/J411 and the Toner CRUM Coupler (C) P/J122 for damage, foreign substances, bent connector pins, burns, and improper soldering on the PWB • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler (C) P/J122 for open circuit, short circuit, and poor contact • The Toner Dispense Motor (C) (PL 5.1): dc330 Component Control [093-011] • The drive transmission path in the Dispense Assembly • The MCU PWB for failure.

• Code: 393.317
• Description: K Disp Motor Fault. Regardless of low usage of toner from K Toner Cartridge, it was detected to be empty.
• Remedy: 1. Turn the power Off and On. 2. Replace the Toner Cartridge (K). If the problem persists, check the following: • The connectors of the MCU PWB P/J411 and the Toner CRUM Coupler (K) P/J123 for damage, foreign substances, bent connector pins, burns, and improper soldering on the PWB • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler (K) P/J123 for open circuit, short circuit, and poor contact • The Toner Dispense Motor (K) (PL 5.1): dc330 Component Control [093-016] • The drive transmission path in the Dispense Assembly • The MCU PWB for failure.

• Code: 393.324
• Description: Dev Y, M, C Motor Fault. The Dev Motor (Y, M, C) revolution failure was detected.
• Remedy: Turn the power Off and remove the Front Cover. Remove the Imaging Unit (Y, M, C) and the Developer (Y, M, C) and cheat the Front Cover Interlock Switch. Turn the power On and enter Service Diag mode (Entering Service Diagnostics). Turn On dc330 Component Control [093-022] (Dev Drive Motor Y, M, C). Does the Dev Drive Motor (Y, M, C) rotate? Y↓ N→Turn the power Off and remove the Rear Upper Cover. Turn the power On. Is the voltage between the MD PWB P/J526-7 (+) and the GND (-) +24VDC? Y↓ N→Go to +24VDC Power RAP. Is the voltage between the MD PWB P/J527-B16 (+) and the GND (-) +5VDC? Y↓ N→Go to +5VDC Power RAP. Turn the power Off and check the connections between the MD PWB P/J526 and the Dev Drive Motor (Y, M, C) P/J251, as well as between the MD PWB P/J527 and the Dev Drive Motor (Y, M, C) P/J252 for open circuits, short circuits, and poor contacts. If no problems are found, replace the following parts in sequence: • Dev Drive Motor (Y, M, C) (PL 3.3) • MD PWB • MCU PWB Press the Stop button and turn the power Off. Install the Drum (Y, M, C), the Developer (Y, M, C), and the Front Cover. Turn the power On and enter Service Diag mode. Turn On dc330 Component Control [093- 022] (Dev Drive Motor Y, M, C). Does the Dev Drive Motor (Y, M, C) rotate? Y↓ N→Check the Developer (Y, M, C) for loading. Press the Stop button and turn the power Off. Check the connection between the Dev Drive Motor (Y, M, C) P/J252-8 and the MD PWB P/J527-B9 for open circuit, short circuit, and poor contact. If no problems are found, replace the following parts in sequence: • MD PWB • MCU PWB

• Code: 393.400
• Description: Y Toner Cartridge Near Empty. It was detected that the replacement timing for Toner Cartridge (Y) is closer than Pre Near.
• Remedy: The Toner Cartridge (Y) needs to be replaced soon. Replace the Toner Cartridge (Y) as required.

• Code: 393.423
• Description: M Toner Cartridge Near Empty. It was detected that the replacement timing for Toner Cartridge (M) is closer than Pre Near.
• Remedy: The Toner Cartridge (M) needs to be replaced soon. Replace the Toner Cartridge (M) as required.