Samsung ML-451 Series Service Manual page 216

4. Alignment and Troubleshooting
5) Remove the Fuser Side-cover-R. Check the surface on Drum-fuser belt and Pressure roller. If there is any
overheated mark, replace fuser unit.
6) Check if the Draw-connector harness is correct. Check its color.
7) Check if 2 thermistor connectors are connected properly.
8) Remove the thermistor. Check if the thermistor has curled as shown below. If there is any contamination on
the film, clean it.
CAUTION
Be careful not to be scratched or curled the film.
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