Read LG 19LH20 (CHASSIS:LA92A) Service Manual online
C
2009
- 15 -
2. Digital TV Video
Check RF cable & Signal.
Check Tuner 5V Power
IC1001 4pin
OK
OK
Check Check Demodulator Input
Clock(X1005-25MHz)
Check IC1002.
Check IC1005(19”, 22”).
No
Check IF_P/N Signal
OK
Bad Tuner. Replace Tuner.
No
Replace X1005.
No
OK
Check Mstar LVDS output
R812, R813,..., R821
Check IC1004(LGDT) Output
- AR1070, AR1071
OK
Replace IC1004.
No
Replace Mstar(IC100) or Main board.
No
3. Analog TV Video
Check RF cable.
Check Tuner 5V Power.
IC1001 4pin
OK
Check CVBS signal.
TU1001 #19 Pin
Check IC1002.
Check IC1005(19”, 22”)
No
OK
Replace Tuner.
No
OK
Check Mstar LVDS output
Replace Mstar(IC100) or Main board.
No
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