• Code: D000
• Description: An error occurred while initializing the touch panel.
• Causes: 1 Connection failure of the touch panel PCB harness. 2 Touch panel PCB failure. 3 Main PCB failure.
• Remedy: 1 Connection failure of the touch panel PCB harness Reconnect the touch panel PCB harness. 2 Touch panel PCB failure Replace the touch panel PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: D100
• Description: An error occurred while initializing the modem.
• Causes: 1 Main PCB failure.
• Remedy: Replace the main PCB ASSY.

• Code: DD00
• Description: Fuser unit error (except error codes 6A00 to 6F00, 7600, 7800, DE00, and E200)
• Causes: 1 Connection failure of the center or side thermistor harness of the fuser unit. 2 Connection failure of the heater harness of the fuser unit. 3 Connection failure of the eject sensor PCB harness. 4 Connection failure of the lowvoltage power supply PCB harness. 5 Eject sensor PCB failure. 6 Low-voltage power supply PCB failure. 7 Fuser unit failure. 8 Main PCB failure.
• Remedy: 1 Connection failure of the center or side thermistor harness of the fuser unit Check the connection of the center or side thermistor harness of the fuser unit, and reconnect it if necessary. 2 Connection failure of the heater harness of the fuser unit Check the connection of the heater harness of the fuser unit, and reconnect it if necessary. 3 Connection failure of the eject sensor PCB harness Check the connection of the eject sensor PCB harness, and reconnect it if necessary. 4 Connection failure of the lowvoltage power supply PCB harness Check the connection of the low-voltage power supply PCB harness, and reconnect it if necessary. 5 Eject sensor PCB failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the eject sensor PCB ASSY. 6 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 7 Fuser unit failure Replace the fuser unit. 8 Main PCB failure Replace the main PCB ASSY.

• Code: DE00
• Description: When the center thermistor of the fuser unit is higher than the idle temperature, the side thermistor detected a temperature lower than the specified temperature.
• Causes: 1 Connection failure of the side thermistor harness of the fuser unit. 2 Connection failure of the eject sensor PCB harness. 3 Eject sensor PCB failure. 4 Fuser unit failure. 5 Main PCB failure.
• Remedy: 1 Connection failure of the side thermistor harness of the fuser unit Check the connection of the side thermistor harness of the fuser unit, and reconnect it if necessary. 2 Connection failure of the eject sensor PCB harness Check the connection of the eject sensor PCB harness, and reconnect it if necessary. 3 Eject sensor PCB failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the eject sensor PCB ASSY. 4 Fuser unit failure Replace the fuser unit. 5 Main PCB failure Replace the main PCB ASSY.

• Code: E000
• Description: An error occurred in the ROM check sum.
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: E100
• Description: Program error
• Causes: 1 Firmware install failure. 2 Main PCB failure.
• Remedy: 1 Firmware install failure Install the latest firmware. 2 Main PCB failure Replace the main PCB ASSY.

• Code: E200
• Description: When the center thermistor of the fuser unit is higher than the idle temperature, the side thermistor detected a temperature higher than the specified temperature.
• Causes: 1 Connection failure of the side thermistor harness of the fuser unit. 2 Connection failure of the eject sensor PCB harness. 3 Eject sensor PCB failure. 4 Fuser unit failure. 5 Main PCB failure.
• Remedy: 1 Connection failure of the side thermistor harness of the fuser unit Check the connection of the side thermistor harness of the fuser unit, and reconnect it if necessary. 2 Connection failure of the eject sensor PCB harness Check the connection of the eject sensor PCB harness, and reconnect it if necessary. 3 Eject sensor PCB failure Refer to "1.3.10 Check sensor operation (function code: 32)" in Chapter 5 to check the sensor operation. If the sensor operation is faulty, replace the eject sensor PCB ASSY. 4 Fuser unit failure Replace the fuser unit. 5 Main PCB failure Replace the main PCB ASSY.

• Code: E600
• Description: Write error in the EEPROM of the main PCB
• Causes: 1 Main PCB failure.
• Remedy: Replace the main PCB ASSY.