LG 50PT350 Service Manual page 29

Repair Process
PDP TV
Symptom
. By using Digital signal level meter
☞A21
. By using Diagnostics menu on OSD
( Menu→Press red key on R/C →Signal TEST)
Check RF Signal level
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Y
Check whether other equipments have problem or not.
Normal
(By connecting RF Cable at other equipment)
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
Move
N
Normal
No Picture/ Sound Ok
Picture?
Section
Y
Check SVC
S/W Version
Bulletin?
Y
S/W Upgrade
Normal
Picture?
Y
Close
Making
Revision
■ Menu→Setup →Booster
Booster menu
N
On→Off: Check
Off→On: Check
Tuner & replace
N
4
2010. 11. 16
Normal Y
Close
Picture?
N
☞A6-1, 2
Check
Main B/D
Contact with signal
distributor or
N
Normal
broadcaster
Picture?
(Cable or Air)
ⓒ LG Electronics. Inc.2010
전자 - 6-2
4/10