2-28 Phaser 6180 Color Laser Printer Service Manual
Theory of Operation
Fuser
The Fuser fixes transferred toner onto the paper using heat and pressure and 
feeds the paper before and after toner is fixed. The Fuser consists of the 
following components: Heat Roller, Heater Lamp, Thermostat, Temperature 
Sensor, Pressure Belt, Exit Roller, and Exit Sensor.
■ Heat Roller
The Heat Roller is a metal tube with coated surface and a Heater inside. 
As the paper passes between the Heat Roller and Pressure Belt, heat 
that is applied to the paper, melts the toner, and fuses it to the paper.
s6180-276
ADC Sensor
ESA Roller
Transfer Unit
Exit Sensor
Exit Roller
Fuser
Temperature 
Sensor (STS)
Temperature 
Sensor (NCS)
Thermostat
Heater Lamp
Heat Roller
Pressure Belt
Rear View
Front