Circuit Protections - Sanyo PLV-55WHD1 Service Manual

■ Circuit Protections

This LCD Projection TV provides the following circuit protections to operate in safety. If the abnormality occurs
inside the LCD Projection TV, it will automatically turn off by operating one of the following protection circuits.
● Fuse
A fuse(F601) is located inside of the LCD Projection TV.
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 Part No. : 323 022 2105
TYPE T4.0AH 250V FUSE
LITTEL FUSE INC. TYPE 215004
How to replace the fuse
1. Unplug the AC power cord.
2. Remove the cabinet bottom cover following to
"Mechanical Disassemblies".
3. Remove the fuse from fuse holder on the Power Board.
To install the fuse, take reversed step in the above.
● Thermal switch
There is the thermal switch (SW902) inside of the LCD
Projection TV to prevent the internal temperature rising
abnormally. When the internal temperature reaches near
95°C, the thermal switch cuts off the drive signal to the
lamp circuit 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 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.
CAUTION:
Before press the reset button, make sure that the AC cord
must be disconnected from the AC outlet.
Fuse
- 5 -
(F601)
Thermal switch
(SW902)
Press