Optoma HD73 Service Manual page 25

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No Procedure
Unscrew 2 screws to re-
5 move Interrupt Switch
Module.
Unscrew  screw to remove
6
PCBA Thermal Sensor BD.
Unscrew 2 screw to remove
7
Bottom Base.
Photo
Interrupt Switch Module
Thermal Sensor BD
2-6
HD73