Description: Plate Action Error The status of the bottom plate position sensor does not change even though 2 secs or more have lapsed after the bottom plate lift clutch is turned ON. This SC is displayed if the error is detected 3 times.
Causes: • The bottom plate lift clutch is loose or defective. • The bottom plate position sensor is loose or defective.
Remedy: • Cycle the power OFF/ON. • Replace the bottom plate lift clutch. • Replace the bottom plate position sensor. • Replace any harnesses connected to the bottom plate lift clutch or bottom plate position sensor.
Code: 520
Description: Main Motor Error • The machine failed to detect a lock signal within 550 ms after the main motor was turned on. • The machine failed to detect a lock release signal with 2 sec. after the main motor was turned off. • This SC is displayed if a lock signal cannot be detected for 8 consecutive times.
Causes: • The AIO is defective. • The main motor is defective.
Remedy: • Cycle the power OFF/ON. • Check the areas around motor and main drive train for any physical obstruction such as paper scraps. • Clean the main motor drive train. • Replace the AIO. • Replace the main motor.
Code: 530
Description: Main Fan Motor Error When the fan motor is ON, a lock signal is sampled every 100 ms. If an incorrect lock signal is detected 100 times (10 sec), the fan is not rotating properly.
Causes: • The fan is defective. • The harness is loose, disconnected or defective.
Remedy: • Cycle the power OFF/ON. • Replace the fan. • Check the harness.
Code: 541
Description: Fuser Thermistor Error No temperature was detected within 6 sec. after the machine was turned on (temperature was less than 0°C). This SC is displayed if no temperature was detected 10 times or more.
Causes: • The fusing unit thermistor is disconnected, broken, or not set correctly. • The fusing lamp is disconnected, broken, or not set correctly. • The fusing unit is defective.
Remedy: • Check the fusing unit thermistor. • Check the fusing lamp. • Replace the fusing unit. • After solving the problem, the service technician must execute [FusingSCReset]. Otherwise, the machine will continue to issue this SC code and cannot be operated.
Code: 542
Description: Fusing Reload Temperature Error After starting up or during operation, the reload (operating) temperature cannot be reached.
Causes: • The fusing thermistor is deformed or out of position. • The fusing lamp harness is loose, broken, or defective. • The fusing unit is defective. • The power voltage is not correct.
Remedy: • Check the power voltage. • Check the fusing unit thermistor. • Check the fusing lamp. • Replace the fusing unit. • After solving the problem, the service technician must execute [FusingSCReset]. Otherwise, the machine will continue to issue this SC code and cannot be operated.
Code: 543
Description: High Temperature Error (Software) The temperature inside the fusing unit exceeded 235°C for more than 0.5 sec. This SC is displayed if the error is detected 10 times or more. However, the machine does not check for this error during low power mode, sleep mode, cover open, or when the fusing lamp relay is OFF due to malfunctions.
Causes: • The PSU is defective (triac has short-circuited). • The main board is defective.
Remedy: • Replace the main board. • After solving the problem, the service technician must execute [FusingSCReset]. Otherwise, the machine will continue to issue this SC code and cannot be operated.