Code Level Details
544 A 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.
• The PSU is defective (triac has short-circuited).
• The fusing unit is defective.
• The main board is defective.
• 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. (page 64 "Executing Fusing SC Reset")
Code Level Details
545 A 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.
• The thermistor is deformed or loose.
• The fusing lamp is damaged.
• The overheat prevention device is activated.
• 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. (page 64 "Executing Fusing SC Reset")
5. Troubleshooting
72
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