Image Fusing

The Fusing Assembly bonds the toner particles into the media with a heated
fusing roller and a soft pressure roller. There are two levers on the Fusing
Assembly which adjust roller pressure for single sheets (down position), or
envelopes (up position). Both levers must be set to the same position.
The fusing roller contains two quartz-halogen lamps that provide heat for
the fusing process. Fusing temperature is monitored by the DC Controller
PCA, via thermistor TH1. The DC Controller maintains a temperature of
about 190° C during print mode. If the fusing system overheats (about
230° C) TH1 opens, interrupting power to the fusing heater, causing a
50.X FUSER ERROR. If the fusing system exceeds 240° C, the thermal fuse
opens, moving power away from the fuser.
Image Fusing
Figure 5-13
5Functional
Overview
Functional Overview 5-19