Description: At power-on / warm up, the exit sensor has detected the paper.
Remedy: Clear the jam.
Code: M3-2130
Display: Output bin full Remove paper
Description: The output tray is full. Or the sensor is not facing down.
Remedy: Remove papers from the output tray, the machine resumes printing. Or make sure the sensor is facing down.
Code: S2-4110
Display: Door open Close it
Description: Ther front door is not securely latched.
Remedy: 1. Close the door until it locks into place. 2. Check if the cover open switch is work properly. If it is defective, replace it. 3. If the problem persists, replace the main PBA.
Code: U1-1211
Display: Error #U1-1211 Turn off then on
Description: Low heat error has occurred.
Remedy: Refer to the fuser error troubleshooting.
Code: U1-2112
Display: Error #U1-2112 Turn off then on
Description: Abnormal ADC has occurred. ZeroCross Signal detect error has occurred.
Remedy: Is the thermistor resistance value in 300-450Kohm? Yes : Replace the thermistor. No : Replace the fuser unit. If the problem persist after replacing the fusur unit, replace the SMPS board or Main board.