542
Fuser reload error
This SC occurs, if any of the following conditions are met:
In a 100V power supply environment:
1. The fusing temperature increased 6 degrees C or less for 5 times
consecutively within 1.5 seconds.
2. The fusing temperature did not reach 45 degrees C within 11 seconds after the
fusing lamp turned ON.
3. The fusing temperature did not reach the reload temperature within 35 seconds
in a normal/high temperature operational environment, or 55 seconds in a low
temperature operational environment.
In a 200V power supply environment:
1. The fusing temperature increased 9 degrees C or less for 5 times
consecutively within 1.5 seconds.
2. The fusing temperature did not reach 45 degrees C within 11 seconds after the
fusing lamp turned ON.
3. The fusing temperature did not reach the reload temperature within 35 seconds
in a normal/high temperature operational environment, or 50 seconds in a low
temperature operational environment.
Disconnected or defective thermistor
Incorrect input power supply detected at the main power socket
Heater defective or thermostat circuit disconnected
Important
To resolve the SC, perform "Reset Fusing Unit SC" after solving the problem,
or the system will continue to display the SC.
543
High temperature error (Soft)
The detected temperature stays at 235°C for 1 second, and this
consecutively occurs 10 times.
Defective Main board
Defective PSU
1. Replace the Main board
2. Replace the PSU
Execute "Reset Fusing Unit SC" to recover the machine after completing
the recovery procedure. Otherwise, the machine continues to issue this
SC code and cannot be operated.
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