Ricoh D072 Service Manual page 297

SC Tables (Basic: D067/D072)
No.
Definition
Fusing temperature warm-up error
The fusing temperature rises 7
degrees or less in two seconds; and
542 A
this continues 5 times consecutively.
Or, the fusing temperature is not
detected within 25 or 35 seconds.
Fusing overheat error 1
The fusing temperature detected by
543 A
the thermistor is 230°C or higher for
one second.
Fusing overheat error 2
The fusing temperature detected by
544 A
the monitor circuit is 250°C or higher
for one second.
Fusing lamp overheat error
After the fusing temperature reaches
545 A
the target, the fusing lamp remains
on for 12 seconds.
Unstable fusing temperature
While the fusing lamp is on, the
546 A
fusing temperature varies 50°C or
more within one second; and this
occurs two consecutive times.
D067/D068/D069/D072
Symptom
3-42
Possible Cause
Defective thermistor
Incorrect installation of the
thermistor
Defective fusing lamp
Defective power supply unit
Defective thermistor
Defective power supply unit
Defective thermistor
Defective power supply unit
Defective thermistor
Incorrect installation of the
thermistor
Defective power supply unit
Defective thermistor
Incorrect installation of the
thermistor
Defective power supply unit
SM Appendix