LG 47LH41 Service Manual page 24

9. Digital TV Audio
Check Tuner 5V Power
TU1001 4Pin
OK
Check IF_P/N Signal
OK
Check Check Demodulator Input
Clock(X1005-25MHz)
OK
Check IC1004(LGDT3305) Output
- AR1070, AR1071
OK
Check Output Signal
P600 1,2,3,4 PIN
OK
Check Connector & P600
OK
Check speaker resistance
and connector damage.
10. Analog TV Audio
Check RF Cable
OK
Check Tuner 5V Power
TU1001 4Pin
OK
Check SIF buffer signal.
OK
Follow procedure All source audio
trouble shooting guide.
2009
Copyright LG Electronics. Inc. All right reserved.
C
Only for training and service purposes
Check IC1002
19/22inch model check
NO IC1005
Replace Tuner.
NO
Replace X1005
NO
Replace IC1004
NO
Replace NTP3100L
(Audio AMP) IC600
NO
Replace connector
if found to be damaged.
NO
Replace speaker.
NO
Check IC1002
Check IC1005(19",22")
NO
Check SIF Signal line.
NO
Replace Mstar(IC100)
NO or Main board
- 24 -
Bad Tuner. Replace
Tuner.
NO
LGE Internal Use Only