A. Picture Problem - LG 55LW5700 Service Manual

Standard Repair Process
LCD TV
☞ A6
Check RF Signal level
Y
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
N
Normal
Picture?
Y
Close
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes

A. Picture Problem

Error
symptom
Picture broken/ Freezing
. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Menu→ Set up→ Support → Signal Test )
- 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`
Y
Normal
Picture?
N
Contact with signal distributor
or broadcaster (Cable or Air)
■ Menu→Setup →Booster
☞ A7
N
Check SVC
S/W Version
Bulletin?
Y
S/W Upgrade
N
Normal
Picture?
Y
Close
3
Established
2010. 12 .14
date
Revised date
Booster menu
Normal
On→Off: Check
Picture?
Off→On: Check
N
Check
Tuner soldering
Replace
Main B/D
ⓒ LG Electronics. Inc.2009
3/13
Y
Close
LGE Internal Use Only