Oki B 4100 Maintenance Manual page 532

Facsimile transceiver

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After the end of the transfer operation, 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 500 W heater (Halogen lamp), which heats the heat roller.

A thermister, which is in contact with the heater roller, regulates the heater roller at a predeter-

mined temperature (about 185 ˚C for OKIFAX 5000 series). A safety thermostat cuts off voltage

supply to the heater by opening the thermostat in the event of abnormal rise in temperature.

The back-up roller is held under a pressure of 2.5 kg by the pressure spring at each side.

Heater roller

Separation claw

Back-up roller

Pressure spring

40055101TH Rev.4

Troubleshooting