Circuit Protections; Thermal Switch; Lamp Cover Switch; Fuse - Sanyo PLC-WXU700 Service Manual

Circuit Protections

This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the pro-
jector, it will automatically turn off by operating one of the following protection circuits.

Thermal switch

There is the thermal switch (SW90) inside of the projector to de-
tect the internal temperature rising abnormally. When the internal
temperature reaches near 100˚C, the thermal switch opens to stop
the operation of the power supply circuit.
The thermal switch cannot be reset itself automatically even if the
internal temperature becomes normal. Reset the thermal switch
following to the below procedure.
How to reset the thermal switch
1. I nsert the sharp tool like a screwdriver into a hole on the cabinet
from the cabinet bottom.
. P ress the reset button on the thermal switch with the screw-
driver.
CAUtION:
Before press the reset button, make sure that the AC cord must be
disconnected from the AC outlet.

Lamp cover switch

The lamp cover switch (SW901) cuts off the drive signal to the lamp
circuit when the lamp cover is removed or not closed completely.
After opening the lamp cover for replacing the lamp ass'y, place the
lamp cover correctly otherwise the projector can not turn on.

Fuse

A fuse is located inside of the projector. When the POWER indica-
tor is not lightning, the fuse may be opened. Check the fuse as
following steps.
The fuse should be used with the following type;
Fuse Part No.: 323 025 1204
tYPe 8A 250V FUSe
LIttLe FUSe INC. tYPe 21500.8
How to replace the fuse
1. T he fuse is placed on the filter board under the main board. Re-
move the cabinet top and main board.
. T ake the fuse off, and replace the new one with the specified type.
-5-
Thermal switch (SW90)
Lamp cover switch
(SW901)
Fuse