Ricoh Di-C1 Manual page 235

Temperature Control Components
Thermopile
Thermistor
Heating
Roller
The following components control the temperature:
Heating roller: One thermistor and two thermostats
Pressure roller: Two thermistors and one thermostat
At the front of the fusing unit: Thermopile
Slide 235
Here is a three-dimensional drawing of the fusing unit.
The thermopile detects the temperature at the center of the fusing unit, and
the thermistor detects the temperature at the end.
Thermostats
Thermostat
Thermistors
235
Di-C1 Training
Pressure
Roller