LG 47LU35 (CHASSIS:LA84D) Service Manual ▷ View online
- 17 -
Check RF Cable
Check IC400(LGDT) Output
-. AR401, AR402
Y
Check Tuner 5V Power
IC710 #3 Pin
Replace IC710
Y
N
Y
Replace IC400
N
Check IF_P/N Signal
Bad Tuner. Replace Tuner.
Check Demodulator Input Clock
X400 (25MHz)
Replace it X400
N
Y
N
Check Mstar LVDS output
Replace Mstar(IC100)
N
Y
Digital TV Video Trouble shooting
- 18 -
Check RF Cable
Check CVBS signal
TU402 #16 Pin
Replace Tuner(TU402)
Y
N
Check Tuner 5V Power
IC710 #3 Pin
Replace IC710
Y
N
Check IIC Line
Replace Mstar(IC100)
Y
N
Check Mstar LVDS output
Replace Mstar(IC100)
N
Y
Analog TV Video Trouble shooting
- 19 -
Check input signal format
Is it supported?
Check signal
C1708, C1709, C1710
C1711, C1712, C1713
Replace it.
Check signal IC903 output
R990, R991, R993
Y
N
Check JK900 / JK901
Replace Jack
Y
N
Y
Replace IC903
N
Y
Check Component Cable
Check Mstar LVDS output
Replace Mstar(IC100)
N
Y
Component Video Trouble shooting
- 20 -
Check input signal format
Is it supported?
Check signal, Hsync, Vsync
R633, R634
Check other set.
If no problem, check signal line.
Check R/G/B signal
R640, R641, R642
Y
N
Check JK605
Replace Jack
Y
N
Y
Check other set.
If no problem, check signal line.
N
Check RGB Cable conductors for
damage
Y
Check Mstar LVDS output
Replace Mstar(IC100)
N
Y
RGB Video Trouble shooting
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