Mal-Discharge/Noise/Dark Picture - LG 42PJ350R Service Manual

Repair Process
PDP TV
Symptom
Check
Picture problem
Type
Dot
type
Mal-discharge
Scan
Type
Check RF Cable
Picture Noise
Connection
Check
Picture mode
Dark Picture
setting
A. Picture Problem

Mal-discharge/Noise/dark picture

Check CTRL ROM Ver.
and
Rom Upgrade
Check voltage
Y
Normal
. –V / V
Y SC
Picture?
(Y-Sus B/D)
N
Replace
Y-Sus B/D
N
Normal Check Tuner
Picture? & Replace
Y
Close
N
Normal 1. Check Z-Sus Board
Picture? 2. Replace Board
Y
Close
Making
Revision
N
Replace
Normal
Control board
Picture?
Y
Close
Check
Normal
Y Drive B/D
Picture?
&
Replace B/D
Y
Close
※Check Discharge resistance (10Ω 2~3ea)
on Power B/D before replace Y Drive B/D
Normal
Picture?
Y
Close
3
N
Replace
Normal
Module
Picture?
Y
Close
N
1.Check Control B/D Normal
2.Replace Board Picture?
Close
N
Replace
Module
ⓒ LG Electronics. Inc.2009
N
Y