Canon LV-S1U Service Manual page 30

2) Thermal Switch (SW902)
When the internal temperature of the lamp or projector rises abnormally, the thermal
switch (SW902) located in the projector turns off the power supply automatically. Reset
the thermal switch manually. To reset it, unplug the AC cord from the outlet, open the
top cabinet, and press the reset button.
Let the projector cool sufficiently before resetting the thermal switch.
CAUTION
Pressing the reset button while the projector is hot may cause burns.
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Part 2: Repair Information