Fuser Unit - Samsung Xpress C480 Series Service Manual

2.2.4.4. Fuser Unit

This unit consists of Heat Roller, a Thermostat, and Thermistor, etc. It fuses the toner that was transferred by the transfer
roller onto the paper, by applying heat and pressure to complete fusing process.
1) Thermostat
When a heat lamp is overheated, a Thermostat cuts off the main power to prevent over- heating.
• Thermostat Type : Non- Contact type Thermostat
• Control Temperature : 195°C ± 5°C
2) Thermistor
It is a temperature detecting sensor.
• Temperature Resistance : 7 kΩ(180°C)
3) Heat roller
The heat roller transfers the heat from the lamp to apply a heat on the paper.
The surface of a heat roller is coated with Teflon, so toner does not stick to the surface.
4) Pressure roller
A pressure roller mounted under a heat roller is made of a silicon resin, and the surface also is coated with Teflon. When a
paper passes between a heat roller and a pressure roller, toner adheres to the surface of a paper and is permanently fused.
5) Halogen Lamp
• Voltage : 110 V (115 ± 5 %) / 220 V : 230 ± 5 %
• Capacity : 850 Watt ± 25 W
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2. Product specification and description
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