14 June, 2002 PRINTER
6-29
Detailed
Descriptions
Fusing system. Fusing lamp and hot roller with a thermistor and fuse controlling
the temperature of the fusing lamp to maintain correct temperature of the hot roller
for fusing and to prevent overheating.
Fusing Pressure and Separation. The sheets pass between the hot roller and a
pressure roller pressed against the hot roller by a large spring to maintain the
correct pressure for fusing. Hot roller strippers remove paper that sticks to the hot
roller.
Fusing unit drive. The fusing unit is driven by the main motor.
Fusing temperature control. The temperature of the hot roller is controlled by
switching the fusing lamp off and on at precise intervals prescribed by the paper
size. When the machine is switched on, or when it returns from the energy save
mode, the temperature is controlled briefly (about 200 ms) with phase control and
thereafter controlled with on/off timing.
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