Service Call Tables
SM 4-43 D014/D015/D078/D079
Trouble-
shooting
Pressure roller thermistor error 2
SC552 A
After the main switch is turned on or the cover is closed, the heating roller
temperature did not reach the ready temperature (45°C) within 80 sec.
after the fusing lamp switches on.
-or-
If the fusing unit did not reach the reload temperature after 350 sec.
Pressure roller thermistor harness loose, disconnected, defective
Pressure roller thermistor defective
Pressure roller thermistor (software) error
SC553 A
The thermistor detected a
temperature over 220°C 12
times within 1 sec.
Do SP5810 to cancel the SC fusing
code.
TRIAC short, AC drive board
defective
VBCU defective
Pressure roller thermistor (hardware) error
SC554 A
The thermistor detected a
temperature over 230°C.
Do SP5810 to cancel the SC fusing
code
TRIAC short, AC drive board
defective
VBCU defective
Pressure roller fusing lamp remains on
SC555 A
After hot roller reaches
warm-up temperature, the
pressure roller fusing lamp
remained for 300 sec. while
the hot roller is not rotating.
Do SP5810 to cancel the SC fusing
code.
Thermistor damaged, or out of
position
Fusing lamp disconnected, broken
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