• Code: 392.312
• Description: ATC Fault [Y]. The frequency at which the ATC Average Fail [Y] or the ATC Amplitude Fail [Y] has been occurring has exceeded the threshold value.
• Remedy: Check the following: • The connection between the ATC Sensor (Y) and the ATC PWB P/J124 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 (Y) (PL 5.1) for revolution failure: dc330 Component Control [093-001] • The Drum Drive Motor (Y, M, C) (PL 3.3) for revolution failure: DC330 [091-027] • The Dev Drive Motor (Y, M, C) (PL 3.3) for revolution failure: DC330 [093-022] • The path from Toner Cartridge (Y) to Developer (Y) for toner blockage • The Developer (Y) for internal toner blockage • The Toner Cartridge (Y) for internal toner blockage If no problems are found, replace the following parts in sequence: • ATC Sensor (Y) (PL 5.2 Item 4) • ATC PWB • MD PWB • MCU PWB

• Code: 392.313
• Description: ATC Fault [M]. The frequency at which the ATC Average Fail [M] or the ATC Amplitude Fail [M] has been occurring has exceeded the threshold value.
• Remedy: Check the following: • The connection between the ATC Sensor (M) and the ATC PWB P/J125 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 (M) (PL 5.1) for revolution failure: dc330 Component Control [093-006] • The Drum Drive Motor (Y, M, C) (PL 3.3) for revolution failure: DC330 [091-027] • The Dev Drive Motor (Y, M, C) (PL 3.3) for revolution failure: DC330 [093-022] • The path from Toner Cartridge (M) to Developer (M) for toner blockage • The Developer (M) for internal toner blockage • The Toner Cartridge (M) for internal toner blockage If no problems are found, replace the following parts in sequence: • ATC Sensor (M) (PL 5.2 Item 4) • ATC PWB • MD PWB • MCU PWB

• Code: 392.314
• Description: ATC Fault [C]. The frequency at which the ATC Average Fail [C] or the ATC Amplitude Fail [C] has been occurring has exceeded the threshold value.
• Remedy: Check the following: • The connection between the ATC Sensor (C) and the ATC PWB P/J126 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 (C) (PL 5.1) for revolution failure: dc330 Component Control [093-011] • The Drum Drive Motor (Y, M, C) (PL 3.3) for revolution failure: DC330 [091-027] • The Dev Drive Motor (Y, M, C) (PL 3.3) for revolution failure: DC330 [093-022] • The path from Toner Cartridge (C) to Developer (C) for toner blockage • The Developer (C) for internal toner blockage • The Toner Cartridge (C) for internal toner blockage If no problems are found, replace the following parts in sequence: • ATC Sensor (C) (PL 5.2 Item 4) • ATC PWB • MD PWB • MCU PWB

• Code: 392.315
• Description: ATC Fault [K]. The frequency at which the ATC Average Fail [K] or the ATC Amplitude Fail [K] has been occurring has exceeded the threshold value.
• 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) (PL 5.1) for revolution failure: dc330 Component Control [093-016] • The Drum/Dev Drive Motor (K) (PL 3.3) for revolution failure): DC330 [091-033] • The path from Toner Cartridge (K) (PL 3.3) 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: 392.649
• Description: ADC Shutter Open Fault. The ADC Sensor shutters is open (cannot be closed). (This is a hidden failure. Data is only recorded in history.)
• Remedy: Check the connection between the ADC Sensor (MOB ADC Assembly) P/J153 and the MCU PWB P/J415 for open circuit, short circuit, and poor contact. Also check whether there is opening/ closing failure due to foreign substances/burrs, etc. at the shutter section of the ADC Sensor. If no problems are found, replace the following parts in sequence: • MOB ADC Assembly • MCU PWB • MCU PWB

• Code: 392.650
• Description: ADC Shutter Close Fault. The ADC Sensor shutters is closed (cannot be opened). (This is a hidden failure. Data is only recorded in history.)
• Remedy: Check the connection between the ADC Sensor (MOB ADC Assembly) P/J153 and the MCU PWB P/J415 for open circuit, short circuit, and poor contact. Also check whether there is opening/ closing failure due to foreign substances/burrs, etc. at the shutter section of the ADC Sensor. If no problems are found, replace the following parts in sequence: • MOB ADC Assembly • MCU PWB • MCU PWB

• Code: 392.651
• Description: ADC Sensor Fault. The ADC Sensor read value of the density reference patch is abnormal. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Check the connection between the ADC Sensor (MOB ADC Assembly) P/J153 and the MCU PWB P/J415 for open circuit, short circuit, and poor contact. Also check whether there is poor connection or foreign substances at the detection section of the ADC Sensor. If no problems are found, replace the following parts in sequence: • MOB ADC Assembly • IBT Assembly • MCU PWB • MCU PWB

• Code: 392.657
• Description: ATC Amplitude Fault [Y]. The difference between the maximum and minimum values in the ATC Sensor (Y) measurement set is lower than the threshold value. (This is a hidden failure. Data is only recorded in history.)
• Remedy: Check the following: • The connection between the ATC Sensor (Y) and the ATC PWB P/J124 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 (Y) for revolution failure: dc330 Component Control [093-001] (PL 5.1) • The Drum Drive Motor (Y, M, C) for revolution failure: DC330 [091-027] (PL 3.3) • The Dev Drive Motor (Y, M, C) for revolution failure: DC330 [093-022] (PL 3.3) • The path from Toner Cartridge (Y) to Developer (Y) for toner blockage • The Developer (Y) for internal toner blockage • The Toner Cartridge (Y) for internal toner blockage If no problems are found, replace the following parts in sequence: • ATC Sensor (Y) (PL 5.2 Item 4) • ATC PWB • MD PWB • MCU PWB