Tuning Fail, Picture Broken/Freezing - LG 43LH54 Series Service Manual

Standard Repair Process
Error Symptom
Content
. By using Digital signal level meter
☞ A5
. By using Diagnostics Setting on OSD
Check RF Signal level
Check whether other equipments have problem or not.
Y
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
End
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Only for training and service purposes
A. Video Error

Tuning fail, Picture broken/freezing

( Setting → Customer Support(red button on remote control) → 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)
☞ A6
N
Check SVC
S/W Version Bulletin
Y
S/W Upgrade
N
Normal
Picture
Y
End
Established date
Revised date
Check Normal
Tuner soldering Picture
N
Replace
Main B/D
3/14
Y
End
LGE Internal Use Only