LG 50PJ350R-TA (CHASSIS:PP01A) Service Manual ▷ View online
ⓒ LG Electronics. Inc.2009
Check IR operation
Power
LED ON?
Latest S/W update
from GCSC
(Firmware Management)
N
Y
OSD
appear?
Y
N
Y
N
Close
Making
Revision
PDP TV
Symptom
A. Picture Problem
No Picture/No Sound
Repair Process
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 …
2
Normal
Y
N
Repair/Replace
IR B/D
ⓒ LG Electronics. Inc.2009
Making
Revision
PDP TV
Symptom
A. Picture Problem
Mal-discharge/Noise/dark picture
Repair Process
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
3
ⓒ LG Electronics. Inc.2009
Making
Revision
PDP TV
Symptom
A. Picture Problem
Picture broken/Freezing
Repair Process
Y
4
N
Check RF Signal level
Normal
Signal?
Check RF Cable
Connection
1. Reconnection
Check
S/W Version
S/W Upgrade
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
SVC
Bulletin?
Replace
Main B/D
Check
Tuner soldering
Normal
Picture?
Y
N
Y
Close
Normal
Picture?
Y
Close
. By using signal level meter
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
- Signal Quality (Normal: over 50%)
Normal
Picture?
Y
Contact with signal distributor
or broadcaster (Cable or Air)
N
N
Normal
Picture?
Y
Close
N
ⓒ LG Electronics. Inc.2009
Making
Revision
PDP TV
Symptom
A. Picture Problem
Vertical bar/ Horizontal Bar
Repair Process
Check
defect type
Y
N
Y
5
Vertical
Line/Bar
Regular
Vertical
Line / Bar
Check Module pattern
by using “TILT” key
on SVC R/C
Normal
Pattern?
1.Check CTRL B/D
2.Replace Board
2.Replace Board
Replace
Module
Irregular
Vertical
Line / Bar
1.Check CTRL B/D
2.Replace Board
2.Replace Board
Normal
Picture?
Check Main B/D
Replace Module
(If Main B/D doesn’t cause)
N
Y
Close
1.Connector re-connection
2.Eliminate foreign material on Connector
2.Eliminate foreign material on Connector
N
※CTRL B/D: Control board
Check connection
of Connector
(COF,TCP)
on CTRL B/D , X B/D
Check connection
of Connector (FPC)
on Y Drive B/D
1.Connector re-connection
2.Eliminate foreign material on FFC
2.Eliminate foreign material on FFC
1. Check Y Drive B/D
2. Replace Board
Normal
Picture?
N
Y
Close
Replace
Module
1.Check CTRL B/D
2.Replace Board
Normal
Picture?
N
Y
Close
N
Y
Normal
Horizontal
Line/Bar
Normal
Half
No picture
1.Check X B/D
2.Replace Board
2.Replace Board
Normal
Picture?
Y
Close
Replace
Module
N
※ H-Line’s Cause is rare CTRL B/D
Click on the first or last page to see other 50PJ350R-TA (CHASSIS:PP01A) service manuals if exist.