Sanyo PLC-XU50, Service Manual

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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 com-
pletely. After opening the lamp cover for replacing the lamp ass’y,
place the lamp cover correctly otherwise the projector can not
turn on.
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Thermal switch
There is the thermal switch (SW902) inside of the projector to
detect the internal temperature rising abnormally. When the inter-
nal temperature reaches near 90˚C, it cuts off the AC main power
supply .
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 cabi-
net bottom.
2.
Press 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.
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.
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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 fol-
lowing steps.
The fuse should be used with the following type;
Fuse replacing steps
1.
Remove the cabinet top and cabinet front following to
“Mechanical Disassemblies”.
2.
Replace the new one with the specified type.
Fuse Part No.: 423 021 7801
TYPE T6.3AH 250V FUSE
LITTLE FUSE INC. TYPE 21506.3
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Thermal switch (SW902)
Fuse
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Circuit Protections