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Circuit Protections
This LCD Projection Monitor provides the following circuit protections to operate in safety. If the abnormality
occurs inside the LCD Projection Monitor, it will automatically turn off by operating one of the following protection
circuits.
A fuse(F601) is located inside of the LCD Projection Monitor.
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
●
Thermal switch
Fuse
FILTER UNIT
PRESS
PRESS
Thermal Switch
(Reset button)
Fuse Part No. : 423 022 2102
TYPE T4.0AH 250V FUSE
LITTEL FUSE INC. TYPE 215004
How to replace the fuse
1.
Remove the cabinet bottom cover and Filter unit following
to "Mechanical Disassemblies".
2.
Remove the fuse from fuse holder on the Filter Board.
To install the fuse, take reversed step in the above.
There is the thermal switch (SW902) inside of the LCD
Projection Monitor to prevent the internal temperature ris-
ing abnormally. When the internal temperature reaches
near 80°C, turn off the AC main power supply automatical-
ly.
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 a tester. If it has high impedance, thermal switch
may be in open.
How to reset the thermal switch
1.
Remove the optical / chassis unit following to "Mechanical
Disassemblies".
2.
Press the reset button on the thermal switch with a sharp-
pointed tool.
CAUTION:
Before press the reset button, make sure that the AC cord
must be disconnected from the AC outlet.
Fig. A-1
Fig. A-2
Be
efore p
Be
press t
p
e
et bu ton
n, make sure tha
t
the AC co d
Th
oc
LCD Pro ction Moni
p ovides he ollow ng cir
ality
norm
he ab
ty. If t
n safe
ate in
o ope
ons t
