Description: High Temperature Error (Hardware) The machine checks the CPU port at 50 ms intervals. This SC is displayed if the CPU port was detected to be LOW for 4 consecutive times.
Causes: • The PSU is defective (triac has short-circuited). • The fusing unit is defective. • The main board is defective.
Remedy: • Replace the PSU. • Replace the fusing unit. • 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.
Code: 545
Description: Fuser Full Heater Error The heating element of the fusing lamp remained at full power for more than 7 sec. (100 V) or 9 sec. (200 V) after the reload temperature was detected. The machine checks for this error during standby, energy save, after reload, or when the fusing unit is not rotating.
Causes: • The thermistor is deformed or loose. • The fusing lamp is damaged. • The overheat prevention device is activated.
Remedy: • Check the fusing thermistor. • Check the fusing lamp. • 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: 547
Description: Motor Thermistor Error
Causes: After starting up, the temperature inside the machine is checked every 100ms. A temperature of -30°C is detected for 4 sec., or 105°C is detected for 1 sec.
Remedy: • Cycle the power OFF/ON. • Check the connection or replace the thermistor. • Replace the I/F harness. • Replace the main board.
Code: 559
Description: Fusing Unit Third Jam Error
Causes: The exit sensor failed to detect the leading edge of the paper within the prescribed time and triggered a jam alert. After this error has occurred three times, the machine will shut down automatically. It cannot be re-started until the machine has been serviced by a service technician.
Remedy: • Check the paper transport path for any physical obstruction such as paper scraps. • Make sure the fusing unit has been installed correctly. • 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: 560
Description: Low Voltage Fuser Reload Error
Causes: Reloading failed because of a voltage drop.
Remedy: • Cycle the power OFF/ON. • Ensure a stable power supply.
Code: 688
Description: No CTL_PRREQ_N Signal Paper failed to feed after the machine has reached the reload temperature, because the main board did not issue a PRREQ signal.
Causes: • The main board harness connector is loose, broken, or defective. • The main board is defective.
Remedy: • Check the main board harness connector. • Replace the main board.