Ref. 2-25 Confidential
The toner transferred on to the paper passes between the heat roller and the pressure roller
in the fuser unit, being fused by heat and pressure. The thermistor detects surface
temperature of the heat roller and turns the halogen heater lamp ON and OFF. This ensures
that the temperature is kept constant.
Fig. Ref. 2-25
Control of fusing temperature
The fuser unit adjusts such temperature according to types and sizes of paper so as to keep
excellent image quality.
The temperature of the fuser unit set by the two thermistors, and it is managed by the
Heat roller Pressure roller
Fuser unitHalogen heater lampThermistor