Muratec MFX-C4000 Field Engineering Manual page 54

2.3.3.4 Fuser Unit
This unit consists of IH-HEAT ROLLER, Thermostats and a Thermistor. It melts and fuses the toner,
transferred by the transfer roller onto the paper, by applying pressure and high temperature to complete
printing job.
- Fusing Type : [Dual Lamp Heating, 700W/500W]
- Heat Roller :[ø18 ]
- Pressure Roller : [ø29 electrically conductive]
- Thermistor – Temperature Detecting Sensor
contact thermistor 2EA
- Thermostat – Overheat Protection Device
- Fuser Bias : 700V(HH), 500V(LL,NN)on the P/R tube
① Thermostat
When a heat lamp is overheated, a Thermostat cuts off the main power to prevent over-heating.
- Non-Cotact type Thermostat
② Heat roller & Belt
The heat roller & Belt transfers the heat from the lamp to apply a heat on the paper. The surface of belt
is coated with PFA, so toner does not stick to the surface.
③ 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 permanently.
Service Manual
Product Specifications and Features
2-40