• Code: 64
• Description: Toner life end soon (C)
• Causes: 1 HVPS control PCB failure. 2 Engine PCB failure. 3 Main PCB failure. 4 Harness connection failure of toner/new sensor PCB ASSY. 5 Toner/new sensor PCB failure.
• Remedy: 1 HVPS control PCB failure Replace the HVPS control PCB ASSY. 2 Engine PCB failure Replace the engine PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY. 4 Harness connection failure of toner/new sensor PCB ASSY Check the sensor performance following the procedure described in “Function code 32”. If any problem occurs, check the harness connection of the toner/new sensor PCB ASSY, then reconnect it. 5 Toner/new sensor PCB failure Replace the toner/new sensor PCB ASSY.

• Code: 65
• Description: Toner life end soon (M)
• Causes: 1 HVPS control PCB failure. 2 Engine PCB failure. 3 Main PCB failure. 4 Harness connection failure of toner/new sensor PCB ASSY. 5 Toner/new sensor PCB failure.
• Remedy: 1 HVPS control PCB failure Replace the HVPS control PCB ASSY. 2 Engine PCB failure Replace the engine PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY. 4 Harness connection failure of toner/new sensor PCB ASSY Check the sensor performance following the procedure described in “Function code 32”. If any problem occurs, check the harness connection of the toner/new sensor PCB ASSY, then reconnect it. 5 Toner/new sensor PCB failure Replace the toner/new sensor PCB ASSY.

• Code: 66
• Description: Toner life end soon (Y)
• Causes: 1 HVPS control PCB failure. 2 Engine PCB failure. 3 Main PCB failure. 4 Harness connection failure of toner/new sensor PCB ASSY. 5 Toner/new sensor PCB failure.
• Remedy: 1 HVPS control PCB failure Replace the HVPS control PCB ASSY. 2 Engine PCB failure Replace the engine PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY. 4 Harness connection failure of toner/new sensor PCB ASSY Check the sensor performance following the procedure described in “Function code 32”. If any problem occurs, check the harness connection of the toner/new sensor PCB ASSY, then reconnect it. 5 Toner/new sensor PCB failure Replace the toner/new sensor PCB ASSY.

• Code: 67
• Description: Toner life end soon (K)
• Causes: 1 HVPS control PCB failure. 2 Engine PCB failure. 3 Main PCB failure. 4 Harness connection failure of toner/new sensor PCB ASSY. 5 Toner/new sensor PCB failure.
• Remedy: 1 HVPS control PCB failure Replace the HVPS control PCB ASSY. 2 Engine PCB failure Replace the engine PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY. 4 Harness connection failure of toner/new sensor PCB ASSY Check the sensor performance following the procedure described in “Function code 32”. If any problem occurs, check the harness connection of the toner/new sensor PCB ASSY, then reconnect it. 5 Toner/new sensor PCB failure Replace the toner/new sensor PCB ASSY.

• Code: 6A
• Description: Fuser unit error (The center thermistor does not detect 60 °C within the specified time.)
• Causes: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY. 3 Fuser unit failure. 4 Low-voltage power supply PCB failure. 5 Eject front sensor PCB failure. 6 Main PCB failure.
• Remedy: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY Check the harness connection between the fuser unit connector and eject front sensor PCB ASSY, and reconnect it. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY Check the harness connection between the eject front sensor PCB ASSY and main PCB ASSY, and reconnect it. 3 Fuser unit failure Replace the fuser unit. 4 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 5 Eject front sensor PCB failure Replace the eject front sensor PCB ASSY. 6 Main PCB failure Replace the main PCB ASSY.

• Code: 6B
• Description: Fuser unit error (The center thermistor does not detect 100 °C within the specified time.)
• Causes: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY. 3 Fuser unit failure. 4 Low-voltage power supply PCB failure. 5 Eject front sensor PCB failure. 6 Main PCB failure.
• Remedy: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY Check the harness connection between the fuser unit connector and eject front sensor PCB ASSY, and reconnect it. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY Check the harness connection between the eject front sensor PCB ASSY and main PCB ASSY, and reconnect it. 3 Fuser unit failure Replace the fuser unit. 4 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 5 Eject front sensor PCB failure Replace the eject front sensor PCB ASSY. 6 Main PCB failure Replace the main PCB ASSY.

• Code: 6C
• Description: Fuser unit error (The center thermistor detects higher temperature than the specified value.)
• Causes: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY. 3 Fuser unit failure. 4 Low-voltage power supply PCB failure. 5 Eject front sensor PCB failure. 6 Main PCB failure.
• Remedy: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY Check the harness connection between the fuser unit connector and eject front sensor PCB ASSY, and reconnect it. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY Check the harness connection between the eject front sensor PCB ASSY and main PCB ASSY, and reconnect it. 3 Fuser unit failure Replace the fuser unit. 4 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 5 Eject front sensor PCB failure Replace the eject front sensor PCB ASSY. 6 Main PCB failure Replace the main PCB ASSY.

• Code: 6D
• Description: Fuser unit error (The center thermistor detects lower temperature than the specified value.)
• Causes: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY. 3 Fuser unit failure. 4 Low-voltage power supply PCB failure. 5 Eject front sensor PCB failure. 6 Main PCB failure.
• Remedy: 1 Harness connection failure between fuser unit connector and eject front sensor PCB ASSY Check the harness connection between the fuser unit connector and eject front sensor PCB ASSY, and reconnect it. 2 Harness connection failure between eject front sensor PCB ASSY and main PCB ASSY Check the harness connection between the eject front sensor PCB ASSY and main PCB ASSY, and reconnect it. 3 Fuser unit failure Replace the fuser unit. 4 Low-voltage power supply PCB failure Replace the low-voltage power supply PCB ASSY. 5 Eject front sensor PCB failure Replace the eject front sensor PCB ASSY. 6 Main PCB failure Replace the main PCB ASSY.