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 dc controller board, a thermistor. If the fusing system overheats (about 446° F/230° 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.

The dc controller board maintains a variable fuser temperature that is dependent on factors such as the paper type set in the paper handling menu.

Figure 22.

Image fusing

Q1860-90918

Chapter 5 Functional information 89

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HP 5100LE manual Image fusing/variable fusing temperature