LG 47LY960H, Service Manual

Page: 21 / 56

- 21 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. Analog RF Video Trouble Shooting guide
Check RF Cable
Connection
Y
Check tuner 3.3V power L6701
Y
Check tuner 1.2V power IC6701
6pin : 1.2V
Reconnection
N
Check IC2300
Replace IC6701
N
N
Replace IC2300
N
Y
Check LG1311 LVDS output Replace IC101
N
Y
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,,,)
4. Digital RF Trouble Shooting guide
Check RF cable & signal
Check tuner 3.3V power L6701
Y
Check IIC Signal
TU6702 Pin#3,4
Y
Check IF Signal
TU6702 Pin#6,7
Y
Check X101
and application circuit
Check IC2300
Replace TU6702
Replace TU6702
N
N
N
Replace IC101
N
Replace IC2300
N
Y
Replace X101