Check The Thermal Switch - Toshiba TDP-S3 Service Manual

Check the thermal switch

The thermal switch is designed to open when the temperature in the lamp housing gets too high. When
the switch opens, the power supply shuts down, turning the projector off.
When a projector shuts down after operating for a few minutes, you need to check the thermal switch
operation. First, power up the projector with the top off (page 89). Let the projector run until it shuts down.
Measure the resistance at the cable connections. If the resistance is infinite (open), replace the safety switch
assembly (page 55), which includes the thermal switch.
TDP-S3/TDP-T3/TDP-MT5 Service Manual 93