December 2002 TOSHIBA TEC 14 - 3 e-STUDIO160/200/250 FUSER UNIT/EXIT UNIT
14.4 Description of Operations
14.4.1 Fuser unit
The power of the main motor is transmitted to the gear of the fuser through the main drive gear assembly
to turn the heater roller. Since the pressure roller is pressed against the heater roller by the spring, it turns
by the power of the heater roller. Consequently, the paper is transported by the heater roller and pressure
roller.
When the paper is transported by the fuser unit, electric power is supplied to the heater lamp inside the
heater roller so that the toner image on the paper is melted and fixed by the heat of the heater roller
surface and the pressure of the pressure roller, respectively.
The temperature of the heater roller is controlled by turning on or off the heater lamp according to the
value detected by the thermistor. If the heat roller temperature exceeds the specified temperature due to
an abnormal condition, the supply of the electric power to the heater lamp is stopped by the thermostat.
The paper, on which fixing has taken place, is stripped from the heat roller by the separation claw and
transported to the exit unit.
14.4.2 Exit unit
Power from the main motor is transmitted to the gears of the exit unit through the gears of the fuser unit to
turn the exit roller. The pinch roller is pressed against the exit roller by the spring so that it is turned by the
power of the exit roller. Consequently, the paper is transported by the exit roller and pinch roller.
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