SC Tables
D115/D116 6-8 SM
No.
Definition
Symptom Possible Cause
543 A
Fusing overheat error 1
The fusing temperature detected by
the thermistor is 230°C or higher for
one second.
Defective thermistor
Defective power supply unit
544 A
Fusing overheat error 2
The fusing temperature detected by
the monitor circuit is 250°C or
higher for one second.
Defective thermistor
Defective power supply unit
545 A
Fusing lamp overheat error
After the fusing temperature
reaches the target, the fusing lamp
remains on for 12 seconds.
Defective thermistor
Incorrect installation of the
thermistor
Defective power supply unit
546 A
Unstable fusing temperature
While the fusing lamp is on, the
fusing temperature varies 50°C or
more within one second; and this
occurs two consecutive times.
Defective thermistor
Incorrect installation of the
thermistor
Defective power supply unit
547 B
Zero cross signal malfunction
The zero cross signal is not
detected within five seconds after
the main power switch is turned on.
Or, the zero cross signal is not
detected within one second after
operation begins.
Defective power supply unit
Defective BICU
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