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

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

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

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

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

• Code: 7D
• Description: Dirt on corona wire (detect discharge error)
• Causes: Dirt or dust on drum unit electrodes. Charge HVPS PCB failure. Main PCB failure
• Remedy: Clean the electrodes of the main body and the drum unit. Replace the charge HVPS PCB ASSY. 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: Registration front actuator 2 catching on some position. Main PCB failure
• Remedy: Correct catching of the registration front actuator 2. 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: Registration front actuator 2 catching on some position. Main PCB failure
• Remedy: Correct catching of the registration front actuator 2. Replace the main PCB ASSY.