HP 5100 Service Manual - Page 91
Image fusing/variable fusing temperature, X FUSER ERROR - 50 2 fuser error
UPC - 808736092500
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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