LG 50PS8000 - Page 54

Copyright ⓒ 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Making
Repair Process
Revision
2009. 2 . 1
1/9
PDP TV
Symptom
A. Picture Problem
No Picture/Sound OK
1
-VY VSC VZB
Check Module pattern
by using “TILT” key
on SVC R/C
Normal
N
Check
Vs, Va
Y
Normal
N
Check voltage
. -V
Y
. VSC
. VZB
※Refer to the Module label for each voltage
Y
N
1. Check Y-Sus/ Z-Sus Board
2. Replace defective B/D
Check B+ Voltage
on Power Board
/ Control Board
.Check B+(5V)
Y
1.Check Control Board
. LED on
. Crystal(X101)
. 1.8V, 3V, 5V FET
. Rom update
2.Replace Control B/D
<SVC R/C & Pattern>
Check
Sound
Sound
OK
Y
Close
Y
Move
No Picture/No sound
Section
Check
LVDS Cable
Replace
Main B/D
Normal
N
Y
N
Move
Power problem
Section
Normal Normal
Move
Power problem
Section
N
First of all, Check whether all of cable between board was inserted properly or not.
(Main B/D↔ Power B/D, Power B/D↔ Y-sus B/D,Y-Sus B/D ↔Z-Sus B/D,LVDS Cable,Speaker Cable,IR B/D Cable,,,)