• Code: 392.668
• Description: ATC Average Fault [K]. The average measured value of ATC Sensor (K) is out of the range of appropriate values. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Check the following: • The connection between the ATC Sensor (K) and the ATC PWB P/J127 for open circuit, short circuit, and poor contact • The connection between the ATC PWB P/J633 and the MD PWB P/J528 for open circuit, short circuit, and poor contact • The Toner Dispense Motor (K) for revolution failure: dc330 Component Control [093-016] (PL 5.1) • The Drum/Dev Drive Motor (K) for revolution failure: DC330 [091-033] (PL 3.3) • The Drum/Dev Drive Motor (K) for revolution failure: DC330 [091-033] (PL 3.3) • The path from Toner Cartridge (K) to Developer (K) for toner blockage • The Developer (K) for internal toner blockage • The Toner Cartridge (K) for internal toner blockage If no problems are found, replace the following parts in sequence: • ATC Sensor (K) (PL 5.2 Item 4) • ATC PWB • MD PWB • MCU PWB

• Code: 392.670
• Description: ADC Patch Fault [Y]. The ADC patch of Y color is abnormally light. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Enter dc122 Fault History. Check whether ADC Sensor Fail or ATC Fail [Y] has occurred. Has Fail 392.651 or 392.312 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (Y) for contamination • The LPH (Y) for contamination • The 1st BTR (Y) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (Y) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (Y) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (Y) • LPH Assembly (Y) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.

• Code: 392.671
• Description: ADC Patch Fault [M]. The ADC patch of M color is abnormally light. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Enter dc122 Fault History. Check whether ADC Sensor Fail or ATC Fail [M] has occurred. Has Fail 392.651 or 392.313 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (M) for contamination • The LPH (M) for contamination • The 1st BTR (M) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (M) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (M) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (M) • LPH Assembly (M) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.

• Code: 392.672
• Description: ADC Patch Fault [C]. The ADC patch of C color is abnormally light. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Enter dc122 Fault History. Check whether ADC Sensor Fail or ATC Fail [C] has occurred. Has Fail 392.651 or 392.314 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (C) for contamination • The LPH (C) for contamination • The 1st BTR (C) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (C) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (C) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (C) • LPH Assembly (C) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.

• Code: 392.673
• Description: ADC Patch Fault [K]. The ADC patch of K color is abnormally light. (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 LPH (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 (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) • LPH Assembly (K) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.

• Code: 392.675
• Description: ADC Mini Setup Fault [Y]. The difference in densities among the ADC patches of Y color is abnormal. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Has Fail 392.651 or 392.312 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (Y) for contamination • The 1st BTR (Y) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (Y) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (BCR) and the BCR (Y) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (Y) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (Y) • HVPS (BCR) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.

• Code: 392.676
• Description: ADC Mini Setup Fault [M]. The difference in densities among the ADC patches of M 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 [M] has occurred. Has Fail 392.651 or 392.313 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (M) for contamination • The 1st BTR (M) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (M) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (BCR) and the BCR (M) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (M) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (M) • HVPS (BCR) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.

• Code: 392.677
• Description: ADC Mini Setup Fault [C]. The difference in densities among the ADC patches of C 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 [C] has occurred. Has Fail 392.651 or 392.314 occurred? Y↓ N→Turn the power Off and check the following: • The Drum (C) for contamination • The 1st BTR (C) for contamination • The Transfer Belt for contamination • The connection and board springs between the HVPS (1st/2nd/DTC) and the 1st BTR (C) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (BCR) and the BCR (C) for open circuits, short circuits, and poor contacts • The connection and board springs between the HVPS (Dev) and the Magnet Roll (C) for open circuits, short circuits, and poor contacts If no problems are found, replace the following parts in sequence: • Imaging Unit (C) • HVPS (BCR) • HVPS (Dev) • HVPS (1st/2nd/DTC) • MCU PWB Go to the appropriate RAP.