Oki OKIOFFICE 84 Service Manual page 445

Page: 262
Service Guide OKIOFFICE 84
Chapter B Print Operation Description
Fusing
The transferred unfused toner image is fused to a sheet of paper because heat and pressure are applied when it
passes between the heat roller and backup roller.
The Teflon-coated heat roller contains a 400 W heater (Halogen lamp) that heats the heat roller. The thermistor on
the surface of the heat roller keeps the temperature of the heat roller constant. A thermostat is also installed for
safety. If temperature rises abnormally, this thermostat opens to suspend voltage supply to the heater.
The backup roller is pressurized to the heat roller by the pressure spring on each side.
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