SERVICE MANUAL LC-XB41 - TechEdu.com

Circuit Protections
This projector provides the following circuit protections to operate in safety. If the abnormality occurs inside the projector,
it will automatically turn off by operating one of the following protection circuits.
Thermal switch
There is the thermal switch (SW902) inside of the projector to detect
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. Insert the sharp tool like a screwdriver into a hole on the cabinet
from the cabinet bottom.
2. Press the reset button on the thermal switch with the screwdriver.
CAUTION:
Before press the reset button, make sure that the AC cord must be
disconnected from the AC outlet.
Thermal switch (SW902)
Lamp cover switch
Lamp cover switch
(SW901)
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 indicator
is not lightning, the fuse may be opened. Check the fuse as following
steps.
The fuse should be used with the following type;
Fuse
Fuse Part No.: 323 025 1204
TYPE 8A 250V FUSE
LITTLE FUSE INC. TYPE 21500.8
How to replace the fuse
1. The fuse is placed on the filter board under the main board. Remove
the cabinet top and main board.
2. Take the fuse off, and replace the new one with the specified type.
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