Service manual

Nacho Family Service Manual 19
Check the Thermal Switch
The thermal switch is designed to open when the temperature inside the projector gets too high. When the switch
opens, the power supply shuts down, turning the projector off.
When the projector shuts down after operating for a few minutes or when the lamp fails to strike after repeated
attempts at startup, check the thermal switch.
1 Power up the projector.
2 Let the projector run until it shuts down.
3 Remove the top enclosure (page 31).
4 Lift the side IR ECA out its mount on the exhaust fan bracket. This allows you to access the thermal switch.
5 Measure the resistance across the terminals at the thermal switch. If the resistance is infinite (Ω), replace
the exhaust fan assembly, which includes the thermal switch (page 37).