• Code: J5, J6, J7, J8
• Display: Jn-Replace Drum [J5-Replace Yellow Drum] [J6-Replace Magenta Drum] [J7-Replace Cyan Drum] [J8-Replace Black Drum]
• Description: The imaging drum has reached its end of life. Install a new imaging drum.
• Remedy: 1. Install a new drum unit. 2. If a new drum unit has been installed but the print engine continues to ask for a new drum unit, reset the drum unit life count using the topic “Consumable count initialization”. Inspect the spring-loaded drum unit contacts (in a set of three). Ensure they are clean and move up and down freely. Remove and reseat them, if necessary. 4. Replace the engine controller board.

• Code: J9, J10, J11, J12
• Display: Jn-Toner Empty [J9-Yellow Toner Empty] [J10-Magenta Toner Empty] [J11-Cyan Toner Empty] [J12-Black Toner Empty]
• Description: The toner cartridge has reached its end of life. Install a new toner cartridge.
• Remedy: 1. Install a new toner cartridge. 2. If a new cartridge has been installed but the print engine continues to ask for a new cartridge, reset the toner cartridge life count using the topic “Consumable count initialization”. Replace the drum unit. 4. Replace the engine controller board.

• Code: L0
• Display: Load Tray #, Size Type
• Description: Load Tray # 1 Size 2 Type 3
• Remedy: 1. Load the requested size and type of paper in the tray. 2. Ensure the tray is installed correctly. 3. Inspect and test the paper size sensors and the tray’s corresponding sensor flags. 4. Replace the paper tray sensor board. 5. Replace the paper tray. 6. Replace the engine controller board.

• Code: T1
• Display: T1-Fuser Upper Error
• Description: A short fault in the upper fuser Thermistor was discovered. Turn off the printer, wait 15 seconds, then turn on the printer. If the problem persists, install a new fuser.
• Remedy: 1. Remove and install the fuser. 2. Test the thermistors inside the fuser using the test described in “Switch scan test”. Replace the fuser. 4. Replace the low-voltage power supply. 5. Replace the engine controller board.

• Code: T2
• Display: T2-Fuser Lower Error
• Description: A short fault in the lower fuser Thermistor was discovered. Turn off the printer, wait 15 seconds, then turn on the printer. If the problem persists, install a new fuser.
• Remedy: 1. Remove and install the fuser. 2. Test the thermistors inside the fuser using the test described in “Switch scan test”. Replace the fuser. 4. Replace the low-voltage power supply. 5. Replace the engine controller board.

• Code: T29
• Display: T29-Temp Sensor Error
• Description: The temperature sensor is either not communicating or reporting invalid data. To reset the sensor, open and close the top cover.
• Remedy: 1. Test the temperature sensor or the relative humidity sensor using the sensor test described in “Switch scan test”. Inspect the wiring harness leading to the entrance sensor board. 3. Replace the temperature/humidity sensor board. 4. Replace the engine controller board.

• Code: T30
• Display: T30-RH Sensor Error
• Description: The relative humidity sensor is either not communicating or reporting invalid data. Turn off the printer, wait 15 seconds, then turn on the printer.
• Remedy: 1. Test the temperature sensor or the relative humidity sensor using the sensor test described in “Switch scan test”. Inspect the wiring harness leading to the entrance sensor board. 3. Replace the temperature/humidity sensor board. 4. Replace the engine controller board.

• Code: T31
• Display: T31-Roller Over Error
• Description: The fuser temperature sensor is reporting a temperature error. Turn off the printer, wait 15 seconds, then turn on the printer. If the problem persists, install a new fuser
• Remedy: 1. Inspect the fuser cooling fan. Ensure it is running correctly and is not blocked. 2. Remove and install the fuser. 3. Test the thermistor inside the fuser using the test described in “Switch scan test”. Replace the fuser. 5. Replace the low-voltage power supply. 6. Replace the engine controller board.