LG 50PW450 Service Manual - Page 26

PDP TV

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Repair Process PDP TV Symptom A. Picture Problem No Picture/Sound OK Making Revision 2010. 11. 16 전자 - 6-2 1/10 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, Power B/D ↔ Z-Sus B/D(for 60Inch), LVDS Cable, Speaker Cable, IR B/D Cable) ☞A1 Check Module pattern by using "TILT" key on SVC R/C Normal ☞A2 Y Check Sound N Sound OK Y Check LVDS Cable N Move No Picture/No sound Section Normal Y N Replace Main B/D ☞A3 Check Vs, Va Y Normal N Move Power problem Section ☞A5~A6 ☞A12 Check voltage . -VY . VSC . VZB Check B+ Voltage Normal Y on Power Board / Control Board .Check B+(5V) N ☞A8~A11 1. Check Y-Sus/ Z-Sus Board 2. Replace defective B/D Close Normal N ☞A13 1.Check Control Board Y . LED on . Crystal(X2), 3.3V, 5V . Rom update 2.Replace Control B/D Move Power problem Section ※Refer to the Module label for each voltage ☞A4 -VY VSC VZB 1 ⓒ LG Electronics. Inc.2010

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ⓒ
LG Electronics. Inc.2010
Making
전자
- 6-2
Repair Process
Revision
1/10
PDP TV
Symptom
A. Picture Problem
No Picture/Sound OK
1
Check Module pattern
by using “TILT” key
on SVC R/C
Normal
☞
A1
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(X2), 3.3V, 5V
. Rom update
2.Replace Control B/D
☞
A3
☞
A5~A6
<SVC R/C & Pattern>
Check
Sound
Sound
OK
Y
Close
Y
Move
No Picture/No sound
Section
☞
A2
Check
LVDS Cable
Replace
Main B/D
Normal
N
Y
N
Move
Power problem
Section
Normal
Normal
Move
Power problem
Section
N
☞
A4
☞
A8~A11
☞
A12
☞
A13
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, Power B/D
↔
Z-Sus B/D(for 60Inch), LVDS Cable, Speaker Cable, IR B/D Cable)
-V
Y
V
SC
V
ZB
2010. 11. 16