• Code: 72
• Description: Laser beam emission failure
• Causes: 1 Laser unit failure. 2 Main PCB failure.
• Remedy: 1 Laser unit failure Replace the laser unit. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 75
• Description: Sensor of the inside temperature for detection detected higher than normal temperature
• Causes: 1 Thermistor ASSY failure. 2 Main PCB failure.
• Remedy: 1 Thermistor ASSY failure Replace the laser scanner unit. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 76
• Description: Rapid temperature rising failure (center thermistor)
• Causes: 1 Fuser unit failure. 2 Main PCB failure.
• Remedy: 1 Fuser unit failure Replace the fuser unit. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 78
• Description: Rapid temperature falling failure (center thermistor)
• Causes: 1 Fuser unit failure. 2 Main PCB failure.
• Remedy: 1 Fuser unit failure Replace the fuser unit. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 7A
• Description: No detection of main motor synchronous signal
• Causes: 1 Motor failure. 2 Main PCB failure.
• Remedy: 1 Motor failure Replace the main motor. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 7D
• Description: Dirt on corona wire (detect discharge error)
• Causes: 1 Dirt or dust on drum unit electrodes. 2 Charge HVPS PCB failure. 3 Main PCB failure
• Remedy: 1 Dirt or dust on drum unit electrodes Clean the electrodes of the main body and the drum unit. 2 Charge HVPS PCB failure Replace the charge HVPS PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 7F
• Description: Fax paper setting mismatch (The setting paper becomes besides the A4/Letter/Legal/ Folio) (Not applicable)
• Causes: 1 Registration front actuator 2 catching on some position. 2 Main PCB failure
• Remedy: 1 Registration front actuator 2 catching on some position Correct catching of the registration front actuator 2. 2 Main PCB failure Replace the main PCB ASSY.

• Code: 80
• Description: Fax paper size is incorrect (The paper is smaller 10mm than the letter size (11inch) in Fax List/ Report)
• Causes: 1 Registration front actuator 2 catching on some position. 2 Main PCB failure
• Remedy: 1 Registration front actuator 2 catching on some position Correct catching of the registration front actuator 2. 2 Main PCB failure Replace the main PCB ASSY.