Fusing Unit - Lexmark C500n Service Manual

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
Fusing roller
1
Back-up roller
2
Fusing heater
3
Thermistor
4
Thermal fuse
5
Function
Used for fusing, containing a heater.
Pressure roller.
Heating device heated by a halogen lamp.
Sensor that detects the temperature of the fuser roller's surface.
Protective device that prevents the fuser roller from being excessively
heated.
5023-110
1-33
General information