Oki OL1200 Service Manual page 39

Page: 20
Service Guide OL1200
Chapter 2 Operation Description
(7) Fusing
After the end of the transfer, the unfused toner image is fused on the paper under heat and pressure as it
passes between the heater roller and the back-up roller. The heater roller with a Teflon coating
incorporates a 400W heater (Halogen lamp), which heats the heat roller.
A thermistor which is in contact with the heater roller regulates the heater roller at a predetermined
temperature (about 185 ~ 188°C). A safety thermostat cuts off voltage supply to the heater by opening the
thermostat in the event of abnormal temperature rises.
The back-up roller is held under a pressure of 2.5 kg from the pressure spring at each side.
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