LG 60LM6450 Service Manual page 46

Standard Repair Process
Error
LCD TV
symptom
. By using Digital signal level meter
☞ A6
. By using Diagnostics menu on OSD
Check RF Signal level
Y
Check whether other equipments have problem or not.
Normal
Signal?
→ DVD Player ,Set-Top-Box, Different maker TV etc`
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
N
Normal
Picture?
Y
Close
A. Picture Problem
Picture broken/ Freezing
( Menu→ Set up→ Support → Signal Test )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
(By connecting RF Cable at other equipment)
Y
Normal
Picture?
N
Contact with signal distributor
or broadcaster (Cable or Air)
☞ A7
Check SVC
S/W Version
Bulletin?
Y
S/W Upgrade
Normal
Picture?
Y
Close
Established
2010. 12 .14
date
Revised date
■ Menu→Setup →Booster
Booster menu
N
Normal
On→Off: Check
Picture?
Off→On: Check
Tuner soldering
N
Replace
Main B/D
3/13
Y
Close
N
Check