LG 47LH41 Service Manual page 20

2. Digital TV Video
Check RF Cable & Signal
OK
Check Tuner 5V Power
TU1001 4Pin
OK
Check IF_P/N Signal
OK
Check Check Demodulator Input
Clock(X1005-25MHz)
OK
Check IC1004(LGDT) Output
- AR1070, AR1071
OK
Check Mstar LVDS output
R1109, R1110, R1111, R1120
3. Analog TV Video
Check RF Cable
OK
Check Tuner 5V Power
TU1001 4Pin
OK
Check CVBS signal.
TU1001 #19 Pin
OK
Check Mstar LVDS output
4. Component Video
Check input signal format.
Is it supported?
OK
Check Component Cable.
OK
Check JK1206
OK
Check Mstar LVDS output
2009
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C
Only for training and service purposes
Check IC1002
NO
Replace Tuner.
NO
Replace X1005
NO
Replace IC1004
NO
Replace Mstar(IC100)
NO or Main board
Check IC1002
NO
Replace Tuner.
NO
Replace Mstar(IC100)
NO
or Main board
Replace Jack.
NO
Replace Mstar(IC100)
NO or Main board
- 20 - LGE Internal Use Only