• Code: 106
• Display: Service Call 106: Error
• Description: Error in engine control logic detected at power ON.
• Remedy: Does error reoccur? Replace engine control board (K7N).

• Code: 107
• Display: Service Call 107: Error
• Description: Engine ROM check sum error.
• Remedy: Does error reoccur? Is error recovered by reloading PU F/W?
  Reload PU I/F. Replace engine control board (K7N).

• Code: 110 ... 116
• Display: Service Call 110: Error ~ 116: Error
• Description: Option unit for different model detected. 110: EnvelopeFeeder 111: Duplex unit 112: 2nd Tray 113: 3rd Tray 114: 4th Tray 115: 5th Tray 116: Finisher
• Remedy: Is a proper option unit for the printer set? Set proper option unit. Check connections and turn power ON. If error is not recovered, replace the unit.

• Code: 120
• Display: Service Call 120: Error
• Description: PU unit fan motor error.
• Remedy: 1) Is fan in PU unit operating? 2) Error reoccurs after replacing fan motor.
  Replace fan motor. Replace engine control board (K7N). Replace engine control board (K7N).

• Code: 121
• Display: Service Call 121: Error
• Description: High-voltage power supply I/F error.
• Remedy: Is cable between PU board andhighvoltage power LSI connected properly?
  Connect properly. Replace high-voltage power supply. Check improper connections for high-voltage.

• Code: 122
• Display: Service Call 122: Error
• Description: Low-voltage power supply fan error. Low-voltage power supply temperature error.
• Remedy: 1) Is fan in low-voltage power supply unit operating? 2) Error reoccurs after replacing fan motor.
  Replace fan motor. Replace low-voltage power supply. Replace low-voltage power supply.

• Code: 123
• Display: Service Call 123: Error
• Description: Improper environment humidity detected by sensor.
• Remedy: 1) Is error message displayed? 2) Does error reoccur?
  Turn ON power again. Replace humidity sensor.

• Code: 124
• Display: Service Call 124: Error
• Description: Improper environment temperature detected by sensor
• Remedy: 1) Is error message displayed? 2) Does error reoccur?
  Turn ON power again. Replace humidity sensor.