LG 60PS7000-ZA (CHASSIS:PD91A) Service Manual ▷ View online
PDP TV Repair Process Index
- Trouble shooting by worst symptom
A. Picture Problem
8
No sound/ Sound distortion
C. Sound Problem
8
No.
Symptom (L)
Symptom (M)
Page
Remark
1
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
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.
Making
Repair Process
Revision
2009. 2 . 1
1/9
PDP TV
Symptom
A. Picture Problem
No Picture/Sound OK
1
-V
Y
V
SC
V
ZB
Check Module pattern
by using “TILT” key
on SVC R/C
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
2. Replace defective B/D
Check B+ Voltage
on Power Board
on Power Board
/ Control Board
.Check B+(5V)
Y
1.Check Control Board
. LED on
. Crystal(X101)
. 1.8V, 3V, 5V FET
. Rom update
. Crystal(X101)
. 1.8V, 3V, 5V FET
. Rom update
2.Replace Control B/D
<SVC R/C & Pattern>
Check
Sound
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,,,)
Making
Revision
2009. 2 . 1
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
Move
No Picture/ Sound Ok
Section
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 …
. RF Cable connection
. SCART Cable connection
. HDMI Cable connection
. Component Cable …
Normal
Y
N
Repair/Replace
IR B/D
Making
Revision
2009. 2 . 1
3/9
PDP TV
Symptom
A. Picture Problem
Mal-discharge/Noise/dark picture
Repair Process
3
Y
N
N
Mal-discharge
Dot
type
Check CTRL ROM Ver.
and
Rom Upgrade
Normal
Picture?
Y
Close
Replace
Control board
Normal
Picture?
Y
Close
Replace
Module
N
Scan
Type
Type
Check
Picture problem
Type
Check voltage
. –V
Y
/ V
SC
(Y-Sus B/D)
Normal
Picture?
Replace
Y-Sus B/D
Normal
Picture?
Y
N
1.Check Control B/D
2.Replace Board
2.Replace Board
Normal
Picture?
Check
Y Drive B/D
&
Replace B/D
Y
Close
N
Dark Picture
Normal
Picture?
Y
Replace
Module
N
Close
1. Check Z-Sus Board
2. Replace Board
2. Replace Board
Check
Picture mode
setting
Picture Noise
Normal
Picture?
Y
N
Close
Y
N
Check RF Cable
Connection
Connection
Check Tuner
& Replace
& Replace
Normal
Picture?
※Check Discharge resistance (10Ω 2~3ea)
on Power B/D before replace Y Drive B/D
Close
Close
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