Tuning Fail, Picture Broken/ Freezing - LG 42LB55 series Service Manual

Standard Repair Process
Error
LCD TV
symptom
☞ A5
Check RF Signal level
Check satellite setting.
- Check LNB frequency.
Y
Normal
- Check satellite
Signal
- Check Satellite connection
(DiSEqC, motor, etc...)
N
Contact with signal
distributor
or broadcaster
(Cable or Air)
End
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Only for training and service purposes
A. Video error

Tuning fail, Picture broken/ Freezing

Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Change satellite setting
(match with installed ANT)
☞ A6
Y Check
Normal
Setting S/W Version
N
N
Normal
Picture
Y
End
Established
2012. 01 .14
date
Revised date
Check
N
SVC
Tuner soldering
Bulletin
Y
S/W Upgrade
N
Normal
Picture
Y
End
4/14
Replace
Main B/D
LGE Internal Use Only