Fusing Temperature Control; Basic Temperature Control - Ricoh B132 Service Manual

THERMISTORS, THERMOSTATS

6.15.3 FUSING TEMPERATURE CONTROL

Basic Temperature Control

The fusing unit has four fusing lamps: one in the hot roller (350W), two in the
heating roller (590W x2), and one in the pressure roller (350W).
• The heating roller is the main source of heat to the fusing belt for fusing.
• The hot roller provides additional heat for fusing.
• The pressure roller maintains the temperature of the fusing belt while the
machine is in standby mode.
The feedback from these thermistors controls the fusing temperature.
Heating roller
Hot roller
Pressure roller
B132/B200
A temperature sensor located at the center and a thermistor at
the front end of the heating roller.
A thermistor located at the front end of the hot roller.
A thermistor located at the center of the pressure roller.
6-138 SM