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2MH/2MJ/2MK/2ML
2-1-7 Fuser section
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 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. Fuser tem-
perature is optimized to the paper type. The heat roller has four separators (claws) which are continuously in
contact with its surface. These separators (claws) 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 press springs. The
temperature of the heat roller is constantly monitored by the control PWB using the fuser thermistor. Should
the temperature of the heat roller exceed the predetermined value, the fuser thermal cutout is activated to
effectively disconnect the heater from power.
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Figure 2-1-21 Fuser unit
2-1-16
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