LG 49LX761H, Service Manual

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Only for training and service purposes
3. Analog RF Video Trouble Shooting guide
4. Digital RF Trouble Shooting guide
Check RF Cable
Connection
Check RF cable & signal
Reconnection
Replace IC2300
Check tuner 3.3V power L6500
Check tuner 3.3V power L6500
Check IC2300
Check IC2300 Replace IC2300
Check tuner 1.2V power IC6700
6pin : 1.2V
Check IIC Signal
TU6702 Pin#4,5
Check X101
and application circuit
Check LG1311 LVDS output
Check IF Signal
TU6702 Pin#6,7
Replace IC101
Replace IC6700
Replace TU6702
Replace X101
Replace IC101
Replace TU6702
NO
NO
NO
NO NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
YES
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable...)