• Code: 71
• Description: Scanner motor does not synchronize with the reference clock.
• Causes: • Scanner motor

• Code: 72
• Description: Cannot detect Beam Detect signal.
• Causes: • Scanner motor • MP tray open sensor

• Code: 73
• Description: Drum unit is not mounted.
• Causes: • Toner sensor • Drum unit

• Code: 74
• Description: Toner empty.
• Causes: • Toner sensor • Toner cartridge

• Code: 75
• Description: In-casing temperature error.
• Causes: • Thermistor ASSY

• Code: 76
• Description: Heater harness disconnected or broken.
• Causes: • Thermistor ASSY • Halogen lamp

• Code: 78
• Description: Heater thermistor harness disconnected or broken.
• Causes: • Thermistor ASSY

• Code: 79
• Description: In-casing temperature sensor harness disconnected or broken.
• Causes: • Thermistor ASSY • Main PCB • Engine PCB • Main motor