Main Power - LG LPC-LM440A/X Service Manual

• MAIN POWER

Main Power input (AC-cord in)
YES
LCD Display "Hello"
NO
Check the Voltage-selector
110V/230V (Duble Voltage only)
Check the DC out
of C202(+)
Check theD901,D902,
D903,D904(POWER B`D)
Q251 Emittor Voltage
Check(.9.6V)
IC271 Vout Voltage Check(.5.2V)
Q265 Collector Voltage
Check(.5V)
Q173 Collector Voltage
Check(.4.6V)
D181,D182,D183 Cathode
Voltage Check(4.6V)
OSC CHECK(X102:9.8304MHz)
- 2-10 -
NO
Check the Fuse
NO
Replace D201,D202,D203D204
NO
NO
NO
NO
NO
NO
NO
Replace the Fuse
REPLACE Q251
REPLACE IC271
POWER SENSE
BLOCK CHECK
RESET
BLOCK CHECK
REPLACE D181,
D182,D183
REPLACE X102
REPLACE MICOM IC
(IC101 LC877480)