System OutlineService Manual 5-75.1.5 Fuser (Fusing Process)Toner that has been through the primary andsecondary image transfer processes is fused or fixedto the paper..The fuser consists of two heat lamps, two heatrollers, one thermistor, and two thermostats. Thefuser melts the toner onto the paper using pressureand heat to complete the printing process.1) Thermostat (2)The thermostats are temperature cut-off devices.If the heat lamps or heat rollers overheat, the thermostat turns offpower to the lamps to prevent fire.2) Thermistor (1)The thermistor detects the temperature of the heat roller’s surface, and feeds this information to the mainprocessor. The processor uses this information to control power to the fuser lamps in order to maintain a steadytemperature to the heat rollers.3) Heat Roller (2)Halogen lamps are used to heat the heat rollers. The heat rollers have a special Teflon surface which ensures thatany melted toner coming into contact with the heat roller surface does not stick. Paper passes between the tworollers which evenly heat the paper from both sides to melt the toner and fusing it onto the media.4) Safety Information - WarningOverheat protection1st level protection: Print engine is stopped if overheatis condition is detected.2nd level protection: Software turns off lamp power ifoverheat condition is detected.3rd level protection: Thermostat turns off lamp power if overheat condition is detected.Protection deviceFuser power is turned off when the duplex cover or the toner cartridge door is open.The printer keeps the surface temperature of the fuser cover under 80° C, and has a caution label attached insidethe exit cover where it can be easily seen by the user.Heat RollerHeat RollerHeat Lamp(500W)Heat Lamp(300W)PaperSpring
