50PT250-ZG, 50PT250A-ZG, 50PT250N-ZG (CHASSIS:PD13K) - LG TV Service Manual (repair manual). Page 27

Read LG 50PT250-ZG / 50PT250A-ZG / 50PT250N-ZG (CHASSIS:PD13K) Service Manual online

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
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
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
☞A9
Check 
Picture mode
setting 
Picture Noise
Normal 
Picture?
Y
N
Close
Y
N
Check RF Cable
Connection
Check Tuner 
& Replace
Normal 
Picture?
Close
Close
3
☞A16
☞A6-1, 2

Display

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