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LG 50PT350-ZK Service Manual page 26

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Repair Process
PDP TV
Symptom
☞A1
Check Module pattern
by using "TILT" key
on SVC R/C
No Picture/ Sound Ok
Check
"Speaker ON/Off" setting
in OSD Menu
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Only for training and service purposes
A. Picture Problem
No Picture/No Sound
☞A2
Y
Check
Sound
Normal
Sound
N
Move
Section
Check Speaker
N
Normal
jack connection
Sound?
& Speaker Cable open
Y
Close
Y
Check
OK
LVDS Cable
N
N
Normal
Sound?
Y
Close
2
Making
Revision
Y
Picture
Close
OK
N
☞A6
Check
Video
Apply
Y
SVC
SVC Bulletin
Bulletin?
(S/W Upgrade etc)
N
Check 17V
Normal
(Audio IC B+)
voltage?
on Power B/D
Y
Check Audio IC Short
Replace Main B/D
2/10
Close
Y
Normal
Sound?
N
N
Check Power B/D
Replace Power B/D
LGE Internal Use Only

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