Panasonic KX-FLB758RU Service Manual page 210

KX-FLB758RU
8.1.7. FIXING
On the process of the transcription, the transferred toner is weakly attached on the paper. Fixing means the process to fix the toner
on the paper permanently. The fixing part melts the toner at the high temperature using the halogen heater. The toner is fixed on
the paper by the heat and pressure through the fixing part with the image. The surface of the heat roller is rosined by Teflon and
lubricated to prevent from attaching the toners. The press roller is made of silicon, and its spring compresses the melted toner.
The fixing part becomes high temperature, so the thermistor and the thermal fuse are provided.
1. Thermistor
The thermistor touches the heat roller and check the temperature to feed back to the control circuit. The surface temperature
should be kept 178 °C while printing.
2. The thermal fuse
The thermal fuse plays the role to prevent the heat roller from rising to abnormal high temperature. The thermal fuse is located
near the heat roller and turns OFF the power when the temperature around the thermal fuse becomes over 121°C. Once the
thermal fuse is turned OFF, it will not be turned ON again.
3. Thermostat
The thermostat takes the same role with the thermal fuse. The thermostat is located near the heat roller, and it turns OFF the
power when the temperature around the thermostat becomes over 135°C.
Fixing Part
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