Read LG 19LH20 (CHASSIS:LA92A) Service Manual online
C
2009
- 19 -
10. Analog TV Audio
Check RF Cable.
OK
Check SIF buffer signal.
Check SIF Signal line.
No
OK
Check Tuner 5V Power
TU1001 4pin
Check IC1002.
Check IC1005(19”, 22”).
No
Bad Tuner
Replace Tuner.
No
OK
Follow procedure All source audio
trouble shooting guide.
Replace Mstar(IC100)
or Main board.
No
9. Digital TV Audio
Check Tuner 5V Power
TU1001 4pin.
Check IC1002.
Check IC1005(19”, 22”)
No
OK
Check IF_P/N Signal.
Bad Tuner. Replace Tuner
No
OK
Check Demodulator Input Clock(X1005).
Replace X1005.
No
OK
Check IC400(LGDT) Output
-AR1070, AR1071
Replace IC400.
No
OK
Check Output Signal
P600 1, 2, 3, 4 pin
Replace NTP(Audio AMP)
IC500
No
OK
Check speaker resistance
and connector damage.
Replace speaker.
No
OK
Check Connector & P600
Replace connector
if found to be damaged.
No
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