Sanyo PLC-XP30 User Manual page 5

There is the thermal switch (SW905) inside of the projector to
prevent the internal temperature from rising abnormally.
When the internal temperature reaches near 100˚C, the AC
main power supply is automatically turned off.
The thermal switch is not reset to normal automatically even if
the internal temperature becomes normal. Reset the thermal
switch with the following procedure.
Check the resistance between terminals of thermal switch by
using the tester. If it has high impedance, thermal switch may
be in operative.
How to reset the thermal switch
1. Remove the cabinet top refer to "Mechanical
Disassemblies".
2. Press the reset button on the thermal switch.
CAUTION:
Before pressing the reset button, disconnect the AC cord from
the projector.
Electric shock protection - Interlock switch (SW902)
Optical Protection -
The lamp circuit of this projector is not iso-
lated from AC line, and it is HOT circuit.
The Interlock switch (SW902) cuts off the
lamp circuit from AC line when lamp cover
is removed.
Interlock
switch
SW902
-5-
Thermal switch
Press
Reset
button