LG 19LS350S Service Manual page 40

Standard Repair Process
LCD TV
symptom
☞ A5
Check RF Signal level
Y
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
N
Normal
Picture?
Y
Close
Copyright © 2012 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
A. Video error
Error
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`
Normal
Picture?
N
Contact with signal distributor
or broadcaster (Cable or Air)
☞ A6
Y
Check SVC
S/W Version Bulletin?
S/W Upgrade
Normal
Picture?
Close
Established
2012. 01 .14
date
Revised date
N
Check
Tuner soldering
Y
N
Y
3/14
Y
Normal
Close
Picture?
N
Replace
Main B/D
LGE Internal Use Only