ⓒ
LG Electronics. Inc.2009
Making
Repair Process
Revision
PDP TV
Symptom
A. Picture Problem
No Picture/Sound OK
1
Check Module pattern
by using “TILT” key
on SVC R/C
Normal
N
Check
Vs, Va
Y
Normal
N
Check voltage
. -V
Y
. V
SC
. V
ZB
※
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(X400)
. 1.8V, 3.3V,1.2V 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
-V
Y
V
SC
V
ZB
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,,,)
Summary of Contents for 42PJ350R
Page 21: ......
