DOWNLOAD LG 50PK780-ZC (CHASSIS:PD02C) Service Manual ↓ Size: 4.96 MB | Pages: 51 in PDF or view online for FREE

Model
50PK780-ZC (CHASSIS:PD02C)
Pages
51
Size
4.96 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
50pk780-zc-chassis-pd02c.pdf
Date
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LG 50PK780-ZC (CHASSIS:PD02C) Service Manual ▷ View online

ⓒ LG Electronics. Inc.2009
PDP TV Repair Process Index
- Trouble shooting by worst symptom
No.
Symptom (L)
Symptom (M)
Page
Remark
1 
A. Picture Problem
No Picture/Sound OK
1
2   
No Picture/No sound
2
3
Mal-discharge/Noise/dark picture
3
4
Picture broken/Freezing
4
5
Vertical bar/ Horizontal Bar
5
6
B. Power Problem
No Power (Not turn on)
6
7
Turn off (Instant, under watching)
7
8
C. Sound Problem
No sound/ Sound distortion
8
9
E. General function Problem
Remote control & Local switch checking
9
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
ⓒ LG Electronics. Inc.2009
Making 
전자 - 6-2
Repair Process
Revision 
1/9
PDP TV
Symptom
A. Picture Problem
No Picture/Sound OK
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(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,,,)
-V
Y
V
SC
V
ZB
2010. 2 . 22
ⓒ LG Electronics. Inc.2009
Making 
전자 - 6-2
Revision 
2010. 2 . 22
2/9
PDP TV
Symptom
A. Picture Problem
No Picture/No Sound
Repair Process
2
Check IR operation
Power 
LED ON?
Latest S/W update
from GCSC 
(Firmware Management)
N
Y
OSD
appear?
Y
N
Y
N
Close
Check Module pattern 
by using “TILT” key
on SVC R/C
Normal
N
Check
Sound
Sound
OK
Y
N
Close
Y
Check 
LVDS Cable 
Replace
Main B/D
Normal
Y
N
Replace
Main B/D
Normal
Check Input signal
. RF Cable connection
. SCART Cable connection
. HDMI Cable connection
. Component Cable …
Normal
Y
N
Repair/Replace
IR B/D
Check
Vs, Va
Normal
Check voltage
. -V
Y
. V
SC
. V
ZB
Y
N
Move 
Power problem
Section
Normal
Y
Check B+ Voltage
on Power Board
/ Control Board
.Check B+(5V)
Normal
1.Check Control Board
. LED on
. Crystal(X101)
. 1.8V, 3V, 5V FET
. Rom update
2.Replace Control B/D
Y
N
Move 
Power problem
Section
1. Check Y-Sus/ Z-Sus
Board
2. Replace defective B/D
N
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