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22LG3DDH (CHASSIS:LA96E) - LG TV Service Manual (repair manual). Page 30

Read LG 22LG3DDH (CHASSIS:LA96E) Service Manual online

2. Digital TV Video
Check RF Cable & Signal
↓ OK
Check Tuner 5V Power
TU1001 4Pin
→
NO
Check IC1002
Check IC1003
↓ OK
Check IF_P/N Signal
→
NO
Bad Tuner. Replace Tuner.
↓ OK
Check Check Demodulator Input
Clock(X1005)
→
NO
Replace X1005
↓ OK
Check IC1004(LGDT) Output
- AR1070, AR1071
→
NO
Replace IC1004
↓ OK
Check Mstar LVDS output
R847,R848….R856
→
NO
Replace Mstar(IC100)
or Main board
3. Analog TV Video
Check RF Cable
↓ OK
Check Tuner 5V Power
TU1001 4Pin
→
NO
Check IC1002
Check IC1003
↓ OK
Check CVBS signal.
TU1001 #19 Pin
→
NO
Bad Tuner. Replace Tuner.
↓ OK
Check Mstar LVDS output
→
NO
Replace Mstar(IC100)
or Main board
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