Samsung ProXpress M453x series Service Manual page 192

4. Troubleshooting
5) Remove the Frame-cover-upper after removing 2 screws. And measure the thermostat continuity. Check if the
thermostat is opened.
6) Measure the LAMP-HALOGEN resistance value from the center and both sides. Check if it has the continuity.
7) Check if the Draw-connector harness is correct. Check its color.
8) Check if 2 thermistor connectors are connected properly.
9) Measure the Thermistor resistance value from the center and both sides.
Check if it has the continuity. (3 Red Circles)
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