Sanyo PLC-XP40, Service Manual

Page: 6 / 92

-6-
●
Interlock switch
The interlock switch (SW902) cuts off the AC mains power supply
when the lamp cover is removed. After opening the lamp cover for
replacing the lamp ass’y, place the lamp cover correctly otherwise
the projector can not turn on.
●
Thermal switch
There is the thermal switch (SW905) inside of the projector to
prevent the internal temperature from rising abnormally. When the
internal temperature reaches near 90˚C, turn off the AC main
power supply automatically.
The thermal switch is not reset to normal automatically even if the
internal temperature becomes normal. Reset the thermal switch
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.
Loosen 2 screws and open the lamp cover.
2.
Press the reset button on the thermal switch with a sharp-
pointed tool.
CAUTION:
Before press the reset button, disconnect the AC cord from the
projector.
■
Circuit Protections
This projector is equipped with 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.
●
Fuse
The fuse is located inside of the projector. When either the LAMP
indicator or the READY indicator is not illuminated, fuse may be
opened. Check the fuse as following steps.
It should be used the specified fuse as follows;
How to replace the fuse
1.
Remove the cabinet top following to “Mechanical
Disassemblies”.
2.
Remove the fuse from fuse holder.
To install the fuse, take reversed step in the above.
Fuse Part No.: 423 021 7801
TYPE T6.3AH 250V FUSE
LITTEL FUSE INC. TYPE 21506.3
Fuse
Line Filter Board
Interlock switch
Thermal switch
Lamp cover