Picture Problem; Picture Broken/ Freezing - LG 70LB650V Service Manual

Standard Repair Process
Error
LCD TV
symptom
☞A6
Check RF Signal level
Y
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
N
Normal
Picture?
Y
Close
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Only for training and service purposes
A. Picture Problem

Picture broken/ Freezing

. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Setting→ Set up→ Manual Tuning → Check the Signal )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
Normal
Picture?
N
Contact with signal distributor
or broadcaster (Cable or Air)
☞A7
Y
Check SVC
S/W Version Bulletin?
Y
S/W Upgrade
Normal
Picture?
Y
Close
4
Established
2014.01.20
date
Revised date
N
Check
Tuner soldering
N
N
Replace
Main B/D
3/13
Y
Close
LGE Internal Use Only