Code :

Code: 6E
Description: Fuser unit failure (The center thermistor does not detect temperature rising within the specified
time.)
Causes: 1 Fuser unit failure. 2 Low-voltage power supply PCB failure. 3 Engine PCB failure.
Remedy: 1 Fuser unit failure Replace the fuser unit. 2 Low-voltage power supply PCB failure Replace the PS PCB unit. 3 Engine PCB failure Replace the engine PCB ASSY.

Code: 6F
Description: Fuser unit failure (The center and side thermistors detect extremely high temperature.)
Causes: 1 Fuser unit failure. 2 Low-voltage power supply PCB failure. 3 Engine PCB failure.
Remedy: 1 Fuser unit failure Replace the fuser unit. 2 Low-voltage power supply PCB failure Replace the PS PCB unit. 3 Engine PCB failure Replace the engine PCB ASSY.

Code: 71
Description: Polygon motor failure
Causes: 1 Laser unit harness connection failure. 2 Laser unit failure. 3 Engine PCB failure.
Remedy: 1 Laser unit harness connection failure Check the two harness connections of the laser unit and reconnect them. 2 Laser unit failure Replace the laser unit. 3 Engine PCB failure Replace the engine PCB ASSY.

Code: 72
Description: Beam detecting sensor (K) failure
Causes: 1 Laser unit harness connection failure. 2 Laser unit failure. 3 Engine PCB failure.
Remedy: 1 Laser unit harness connection failure Check the two harness connections of the laser unit and reconnect them. 2 Laser unit failure Replace the laser unit. 3 Engine PCB failure Replace the engine PCB ASSY.

Code: 73
Description: Beam detecting sensor (C) failure
Causes: 1 Laser unit harness connection failure. 2 Laser unit failure. 3 Engine PCB failure.
Remedy: 1 Laser unit harness connection failure Check the two harness connections of the laser unit and reconnect them. 2 Laser unit failure Replace the laser unit. 3 Engine PCB failure Replace the engine PCB ASSY.

Code: 74
Description: Toner cartridge whose color is used reaches the end of life during printing.
Causes: 1 Toner sensor PCB (TE/NEW) failure (Toner empty). 2 Engine PCB failure.
Remedy: 1 Toner sensor PCB (TE/NEW) failure (Toner empty) Check the sensor performance following the procedure described in “Maintenance mode 32”. If any problem occurs, replace the toner sensor PCB (TE/NEW) of the appropriate color. 2 Engine PCB failure Replace the engine PCB ASSY.