Ricoh D131 Service Manual page 501

SC500: Feed, Transport, Duplex, and Fusing
SC552-03 A
Fusing thermistor error 4: End thermistor (software)
The end thermistor (contact type) was at 240°C (464°F) for more than
SC553 A
1 second. The temperature is read 10 times every second. (at 0.1 s
intervals).



Fusing lamp error
SC555 A
After the start of the warmup cycle, a fusing lamp was at full power for
1.8 s but the hot roller did not turn.



Zero cross signal error
SC557 C
High frequency noise was detected on the powe
r line.

D131/D132/D133
Fusing reload temperature error 3: End thermistor
The hot roller did not reach the prescribed temperature within 3 sec,
after the start of the fusing temperature control cycle.

Fusing lamp disconnected

Thermistor connector loose, broken, defective

Thermistor out of position, installed incorrectly

Thermostat open
PSU defective
IOB control board defective
BICU control board defective
Thermistor bent, out of position
Fusing lamp disconnected
Circuit breaker opened
No action required. The SC code is logged and the operation of
the machine is not affected.
2-34 SM Appendix