Ricoh G165 Service Manual page 136

Service Call Conditions
Thermistor Error
The thermistor output is less than 0°C for 7 seconds.
Disconnected thermistor
Defective harness connection
1. Check the harness connection of the thermistor.
541
2. Replace the fusing unit.
Execute "Fuser SC Reset" with SOM (printer models) or "Engine
Maintenance Menu" (MF model) to recover the machine after completing
the recovery procedure. Otherwise, the machine continues to issue this
SC code and cannot be operated.
Print Ready Temperature Error
The heating roller temperature increase during a set time is not correct.
The fusing temperature does not reach the print ready temperature within a
set time after the fusing lamp has turned on.
Defective thermistor
Incorrect power supply input at the main power socket
Defective fusing lamp
542
1. Check the voltage of the wall outlet.
2. Replace the fusing unit
3. Replace the fusing lamp.
Execute "Fuser SC Reset" with SOM (printer models) or "Engine
Maintenance Menu" (MF model) to recover the machine after completing
the recovery procedure. Otherwise, the machine continues to issue this
SC code and cannot be operated.
G165/G166/G167/G181/G183/G184 4-12 SM