General information 1-33
5023-110
Fusing unit
The fusing unit utilizes a thermal fusing system that contains a heated fusing roller and a belt-like backup
roller. The heated roller contains an inner heating element. The backup roller contains three pressure
members located behind the belt. Paper carrying a toner image passes between the rollers where heat and
pressure are applied to the paper to fuse the toner to the paper.
The fusing unit consists of the following components:
No. Part Function
1
Fusing roller Used for fusing, containing a heater.
2
Back-up roller Pressure roller.
3
Fusing heater Heating device heated by a halogen lamp.
4
Thermistor Sensor that detects the temperature of the fuser roller’s surface.
5
Thermal fuse Protective device that prevents the fuser roller from being excessively
heated.
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