LG 42PT250 User Manual

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
Normal
☞A1
N
Check
Vs, Va
Y
Normal
N
Check voltage
. -V
Y
. VSC
. VZB
※Refer to the Module label for each voltage
Y
N
1. Check Y-Sus/ Z-Sus Board
2. Replace defective B/D
Check B+ Voltage
on Power Board
/ Control Board
.Check B+(5V)
Y
1.Check Control Board
. LED on
. Crystal(X2), 3.3V, 5V
. Rom update
2.Replace Control B/D
☞A3
☞A5~A6
<SVC R/C & Pattern>
Check
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)
-VY VSC VZB
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Only for training and service purposes
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LG 42PT250 Specifications

General

Brand	LG
Model	42PT250
Category	Plasma TV
Language	English