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4. Analog TV Video Trouble Shooting
Check RF Cable
Y
Check Tuner(TU101) Power
(5.0V, 2.5V, 3.3V, 1.2V)
Y
Check CVBS Signal
TU101 #7 Pin and R118
Y
Check cable between P203 at Jack
Board and P701 at Main Baord
Y
Check CVBS Signal
R703 and C110 at Main Baord
Y
Maybe BCM3556(IC100)
has problems
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Only for training and service purposes
Replace one of IC101, IC102 at
N
Jack Board or IC803/ Q812/ IC804/
IC809/Q809/+5V_ST and +12V of
P801 at Main Board& Recheck
N
Maybe Tuner(TU101) has problems
N
Maybe Cable Pin has problems
N
Replace one of R703 and C110
& Recheck
LGE Internal Use Only
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