• Code: 077-906
• Description: Feed Out Sensor 4 Static Jam Feed Out Sensor 4 On was detected during Standby.
• Remedy: Check the following: • The Feed Out Sensor 4 for remaining paper, Actuator return failure, foreign substances, contamination on sensor, and etc. • Feed Out Sensor 4: Input Check [072-112] (PL 11.5) If no problems are found, replace the 2TM PWB (PL 11.6).

• Code: 091-401, 091-402
• Description: Drum Cartridge Quality Life Over/ Drum Cartridge Life Over [Drum Cartridge Quality Life Over] The image quality guarantee period for the Drum Cartridge has ended. (When Drum Hard Stop-less is enabled) [Drum Cartridge Life Over] When in Life Extension Mode, the Drum Cartridge was detected to be near the end of its life span
• Remedy: Replace the Drum Cartridge. (PL 8.1) NOTE: After replacing the Drum Cartridge, clear the HFSI [950-807] (Drum Cycle Counter) to '0'.

• Code: 091-406, 091-424
• Description: Drum Cartridge Normal Life Over/ Drum Cartridge Abnormal Life Over [Drum Cartridge Normal Life Over] The operation guarantee period for the Drum Cartridge has ended. (When Drum Hard Stopless is enabled) [Drum Cartridge Abnormal Life Over] The Drum Cartridge is out of warranty and this could result in a malfunction of the machine. (When Drum Hard Stop-less is enabled)
• Remedy: Replace the Drum Cartridge. (PL 8.1) NOTE: After replacing the Drum Cartridge, clear the HFSI [950-807] (Drum Cycle Counter) to '0'.

• Code: 091-430
• Description: Drum Cartridge Life End The Drum Cartridge must be replaced
• Remedy: Replace the Drum Cartridge. (PL 8.1) NOTE: After replacing the Drum Cartridge, clear the HFSI [950-807] (Drum Cycle Counter) to '0'.

• Code: 091-440
• Description: Drum Cartridge Pre Near End Preparation for replacing the Drum Cartridge is required.
• Remedy: The Drum Cartridge needs to be replaced soon. Prepare a new Drum Cartridge. Replace the Drum Cartridge as required. (PL 8.1) NOTE: After replacing the Drum Cartridge, clear the HFSI [950-807] (Drum Cycle Counter) to '0'.

• Code: 091-441
• Description: Drum Cartridge Near End The Drum Cartridge needs to be replaced soon.
• Remedy: The Drum Cartridge needs to be replaced soon. Replace the Drum Cartridge as required. (PL 8.1) NOTE: After replacing the Drum Cartridge, clear the HFSI [950-807] (Drum Cycle Counter) to '0'.

• Code: 092-660, 092-668
• Description: ATC Amplitude Fail/ ATC Average Fail [ATC Amplitude Fail] The output amplitude of the ATC Sensor in the ATC (Automatic Toner Control) measurement is small. [ATC Average Fail] The average output value is not within the specified range in the ATC (Automatic Toner Control) measurement.
• Remedy: 1. Install a Toner Cartridge that contains Toner. Copy a Test Chart (499T247), etc. and check whether the density has recovered. 2. Check the Toner Dispense Motor (Output Check [092-001]) for operation failure. (PL 8.2) 3. Check the Toner transport path for Toner blockage. 4. Check the connection between the ATC Sensor P615 and the ESS/MCU PWB J409 for open circuit, short circuit, and poor contact. 5. If no problem is found, replace the following parts in sequence: • ATC Sensor (PL 8.6) • Developer Unit (PL 8.4) • Drum Cartridge (PL 8.1) NOTE: After replacing the Drum Cartridge, clear the HFSI [950-807] (Drum Cycle Counter) to '0'. • ESS/MCU PWB (PL 18.3)

• Code: 092-661
• Description: Temperature Sensor Fail The output value of the Temperature Sensor is not within the specification range.
• Remedy: 1. Turn the power OFF and ON. 2. Check the connection between the HVPS J500-1 and the ESS/MCU PWB J402-14 for open circuit, short circuit, and poor contact. 3. If no problem is found, replace the following parts in sequence: • HVPS (PL 18.3) • ESS/MCU PWB (PL 18.3)