EN
Image Formation System
5-31
Image Fusing/Variable Fusing Temperature
During the fusing process, the toner is fused into the paper by heat
and pressure to produce a permanent image. The paper passes
between a heated fusing roller and a soft pressure roller. This melts
the toner and presses it into the paper.
The fusing roller contains a ceramic heating element that provides
heat for the fusing process. Fusing temperature is monitored by the
Engine Controller Board, via the thermistor TH901. The Engine
Controller Board maintains a temperature of about 383°F (195°C)
during print mode. If the fusing system overheats (about
428°F/220°C), a relay opens, interrupting power to the Fusing Heater,
causing a Fuser error message (
50.X FUSER ERROR
). If the fusing
system exceeds 464°F (240° C), the thermal fuse will open, cutting off
power to the Fuser.
Figure 5-18
Image Fusing
Fusing Roller
Halogen Heater
Paper
Pressure
Roller
Toner
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