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. This printer utilizes an on-demand fusing method, which uses fusing film with small heat capacity. This method has fast temperature-rising time. It is not necessary to supply power to the fuser heater during the standby mode. Wait time is shortened and energy conservation is made possible by this method.
The fusing roller contains a ceramic strip that contains three heating elements, providing heat for the fusing process. Fusing temperature is monitored by the engine controller board using two thermistors. The engine controller board maintains a temperature of about 195° C (383° F) during print mode. If the fusing system overheats (about 240° C/464° F), a relay opens, interrupting power to the fusing heater and causing a fuser error message ( 50.X FUSER ERROR ). If the fusing system exceeds 250° C (482° F), the thermal fuse will open, cutting off power to the fuser. Figure 26. Image fusing EN Chapter 5 Theory of operation 115