LG 50PV350T-ZD (CHASSIS:PD11L) Service Manual ▷ View online
Making
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
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
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(X2), 3.3V, 5V
. Rom update
. Crystal(X2), 3.3V, 5V
. Rom update
2.Replace Control B/D
☞A3
☞A5~A6
<SVC R/C & Pattern>
Check
Sound
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
Making
Revision
2/10
PDP TV
Symptom
A. Picture Problem
No Picture/No Sound
Repair Process
Check Module pattern
by using “TILT” key
on SVC R/C
Normal
☞A1
N
Check
Sound
Sound
OK
Y
☞A2
N
Move
No Picture/ Sound Ok
Section
Close
Y
Check
LVDS Cable
Picture
OK
Y
N
2
Y
Normal
Sound?
N
Check
“Speaker ON/Off” setting
in OSD Menu
Close
Y
Normal
Sound?
N
Close
Check Speaker
jack connection
& Speaker Cable open
Y
Normal
voltage?
N
Check 17V
(Audio IC B+)
on Power B/D
Check Power B/D
Replace Power B/D
Check Audio IC Short
Replace Main B/D
SVC
Bulletin?
Apply
SVC Bulletin
(S/W Upgrade etc)
N
Normal
Sound?
N
Y
Close
Y
Check
Video
☞A6
Making
Revision
3/10
PDP TV
Symptom
A. Picture Problem
Mal-discharge/Noise/dark picture
Repair Process
Y
N
N
☞A15
Mal-discharge
☞A14
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)
☞A5
Normal
Picture?
Replace
Y-Sus B/D
Normal
Picture?
Y
N
1.Check Control B/D
2.Replace Board
2.Replace Board
Normal
Picture?
☞A13
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
☞A9
Check
Picture mode
setting
Picture Noise
Normal
Picture?
Y
N
Close
Y
N
Check RF Cable
Connection
Connection
Check Tuner
& Replace
& Replace
Normal
Picture?
Close
Close
3
☞A16
☞A6-1, 2
Making
Revision
4/10
PDP TV
Symptom
A. Picture Problem
Picture broken/Freezing
Repair Process
Y
☞A21
4
N
Check RF Signal level
Normal
Signal?
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc
■ Menu→Setup →Booster
. By using Digital signal level meter
. By using Diagnostics menu on OSD
. By using Diagnostics menu on OSD
( Menu→Press red key on R/C →Signal TEST)
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Normal
Picture?
Y
N
Normal
Picture?
Y
Close
N
N
Check
S/W Version
Booster menu
On→Off: Check
Off→On: Check
Off→On: Check
S/W Upgrade
SVC
Bulletin?
Check
Tuner & replace
Main B/D
Normal
Picture?
Y
N
Y
Close
Normal
Picture?
Y
Close
N
☞A6-1, 2
Normal
Picture?
N
Contact with signal
distributor or
broadcaster
(Cable or Air)
Move
No Picture/ Sound Ok
Section
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