Ricoh M080 Service Manual page 153

Fusing overheat error – software
The fusing temperature was detected
543 A
higher than 235°C for longer than 200
ms.
High temperature detection: Hard
544 A
The thermister detects a high
temperature signal.
Fusing lamp remains on
The fusing lamp remained on longer
545 A
than 12 sec. after the fusing unit
reached optimum temperature and the
main motor switched off.
Unstable fusing temperature
During standby, the fusing temperature
went below 60°C twice or went above
60°C three times within 500 ms.
546 A
A 60°C increase in fusing temperature
was detected at five 1-sec. intervals
within 60 sec. before reaching fusing
temperature.
SM Appendix
Fusing thermistor defective
Power supply board defective
Defective thermister
Defective fusing unit, PSU,
engine board
Fusing thermistor defective
Power supply board defective
Defective connection of the
fusing unit
Fusing thermistor defective
Power supply board defective
Defective connection of the
fusing unit
2-5
Service Call Conditions
M080