LG 50PW450 Service Manual - Page 27
A. Picture Problem, Repair Process - upgrade
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Repair Process PDP TV Symptom A. Picture Problem No Picture/No Sound Making Revision 2010. 11. 16 전자 - 6-2 2/10 ☞A1 Check Module pattern by using "TILT" key on SVC R/C Normal ☞A2 Y Check Sound N Move No Picture/ Sound Ok Section Sound Y Check OK LVDS Cable Picture OK Y Close N ☞A6 N Check Video Check "Speaker ON/Off" setting in OSD Menu Normal N Sound? Y Check Speaker jack connection & Speaker Cable open Close Close Normal N Sound? SVC Bulletin? Y Apply SVC Bulletin (S/W Upgrade etc) Normal Sound? Y Y N N Close Check 17V (Audio IC B+) on Power B/D Normal N voltage? Y Check Power B/D Replace Power B/D Check Audio IC Short Replace Main B/D 2 ⓒ LG Electronics. Inc.2010
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ⓒ
LG Electronics. Inc.2010
Making
전자
- 6-2
Revision
2/10
PDP TV
Symptom
A. Picture Problem
No Picture/No Sound
Repair Process
Check Module pattern
by using “TILT” key
on SVC R/C
Normal
☞
A1
N
Check
Sound
Sound
OK
Y
☞
A2
N
Move
No Picture/ Sound Ok
Section
Close
Y
Check
LVDS Cable
Picture
OK
Y
N
2
Y
Normal
Sound?
N
Check
“Speaker ON/Off” setting
in OSD Menu
Close
Y
Normal
Sound?
N
Close
Check Speaker
jack connection
& Speaker Cable open
Y
Normal
voltage?
N
Check 17V
(Audio IC B+)
on Power B/D
Check Power B/D
Replace Power B/D
Check Audio IC Short
Replace Main B/D
SVC
Bulletin?
Apply
SVC Bulletin
(S/W Upgrade etc)
N
Normal
Sound?
N
Y
Close
Y
Check
Video
☞
A6
2010. 11. 16