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2-1-7
Fuser section
(1) Fuser unit
The toner on the paper is molten and pressed into the paper as it passes between the heat roller and the press roller in the
fuser unit.
The heat roller has a heater lamp (750 W) inside which continuously turns on and off by the fuser thermistor to maintain
the constant temperature onto the heat roller surface.
The heat roller is resin coated by florin to prevent toner from accumulating on the roller after a long run. Care must be
taken while handling the heat roller not to scratch the roller surface as doing so may result in print problems.
The heat roller has four claws (separators) which are continuously in contact with its surface. These claws (separators)
prevent the paper on which toner has been fused from being wound around the heat roller causing paper jam.
The press roller is made of the heat-resistant silicon rubber. This roller is used to strongly press the paper towards the
heat
roller by means of coil springs.
The temperature of the heat roller is constantly monitored by the engine/high voltage PWB using the fuser thermistor and
triac. Should the temperature of the heat roller exceed the predetermined value, the thermal cutout is activated to effec-
tively disconnect the heater lamp from power.
Y107330-8
Figure 2-1-14 Fuser unit
(1)
Upper fuser frame
(2)
Lower fuser frame
(3)
Heat roller
(4)
Press roller
Service Manual
(5)
Heater lamp
(6)
Thermal cutout
(7)
Separators
(8)
Fuser actuator
2-1-11
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