13.6 FUSING LAMP CONTROL
There are two fusing lamps in the hot roller: the main fusing lamp (550 W)
[A] and the secondary fusing lamp (350 W) [B]. The positions of the filaments
in the main and secondary fusing lamps are different. So, the main fusing
lamp heats the center of the hot roller and the secondary fusing lamp heats
both ends of the hot roller. Using this system, the temperature of the center
and ends of the hot roller will be uniform.
The temperatures at the center and the side are monitored by individual
thermistors [C]. Paper of various sizes will cause the hot roller to give up
heat at different rates. The two thermistors detect this change and turn on
the lamps accordingly.
Main
Secondary
[A]
[B]
[C]
[C]
[C]
[B]
[A]
A156/A160/A162 2-108 STM
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