LG 49LX570H - Page 11

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Only for training and service purposes
4. Digital RF Trouble Shooting guide
Check RF Cable
Check IIC Signal
TU3001 #3, 4Pin
Check IIC line an d level shifter circuit
Y
N
Check Tuner 5V Power
L3000
Check L3000
Y
N
Y
Check X201
and application circuit
Check IF Signal
TU3001 #10, 11 Pin
Check tuner application circuit or
replace tuner.
N
Y
Replace X201
N
Y
Replace IC101
Replace IC5000
N
Y
Replace L3000