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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 (SW90) inside of the projector to
detect the internal temperature rising abnormally. When the
internal temperature reaches near 90˚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. Remove the cabinet top.
. Press the reset button on the thermal switch.
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 pro-
jector can not turn on.
Fuse
A fuse is located inside of the projector. When the POWER indi-
cator 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.: 323 021 7804
tYPe t6.3AH 250V FuSe
LIttLe FuSe INc. tYPe 21506.3
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.
. Take the fuse off, and replace the new one with the specified
type.
Filter Board
-5-
Thermal switch (SW90)
Fuse
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