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.
Code: U1-2121
Display: Error #U1-2121 Turn off then on
Description: Over heat error has occurred.
Remedy: Refer to the fuser error troubleshooting.
Code: U2-1112
Display: Error #U2-1112 Turn off then on
Description: LSU has some problem.
Remedy: Turn off the machine then on. If the problem persist, replace the LSU unit.
Code: U2-1114
Display: Error #U2-1114 Turn off then on
Description: LSU does not work but the Lready signal is detected.
Remedy: Turn off the machine then on. If the problem persist, replace the LSU unit.