LG 55EC9300 Repair Manual page 83

Standard Repair Process
LCD TV
☞ A3
Check RF Signal level
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Normal
Picture?
Y
Close
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Only for training and service purposes
Error
symptom
. By using Digital signal level meter
. By using Diagnostics menu on OSD y g g
( Setting→ Set up→ Manual Tuning → Check the Signal )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Y
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
N
Contact with signal distributor
or broadcaster (Cable or Air)
A. Video error
Picture broken/ Freezing
☞ A4 A4
Y
Check
SVC
S/W Version Bulletin?
S/W Upgrade
Normal
Picture?
Close
3
Established
2013.01.31
date
Revised date
N
Check
Tuner soldering
Y
N
Replace Replace
Main B/D
Y
3/16
Y
Close
N
LGE Internal Use Only