DOWNLOAD LG 42PT250-TA (CHASSIS:PA11K) Service Manual ↓ Size: 10.54 MB | Pages: 36 in PDF or view online for FREE

Model
42PT250-TA (CHASSIS:PA11K)
Pages
36
Size
10.54 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pt250-ta-chassis-pa11k.pdf
Date
PREV: LG 42PT250R-TA (CHASSIS:PP11K) Service Manual

LG 42PT250-TA (CHASSIS:PA11K) Service Manual ▷ View online

Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
Check & Adjust –V
Y
,V
SC
,V
ZB
voltage(50R3)
Repair Process-Reference data
Voltage Check & Adjustment : 
50R3
1. Vsc (
150V
) on Y-Sus B/D
- Check Point: 
R324
- Adjustment Point: 
VR301
2. -Vy (
-190V
) on Y-Sus B/D
- Check Point: 
R334
- Adjustment Point: 
VR302
A5
<Module Label>
A5
-Vy adjustment
YSUS board
Fuses
Vsc adjustment
Vzb
Vy Vsc
2010. 11. 16
Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
Check & Adjust –V
Y
,V
SC
,V
ZB
voltage(50R3)
Repair Process-Reference data
3. VZB (
115V
) on Z-Sus B/D
. Check Point: 
R156
- Adjustment Point:
VR204
Voltage Check & Adjustment : 
50R3
<Module Label>
A5
A5
ZSUS board
Vzb adjustment
Vzb
Vy Vsc
2010. 11. 16
Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
Fuse Checking Method
Repair Process-Reference data
A7
1) Sound comes, the fuse is OK.
2) If Fuse is defects, it should check again voltage of 5V, Va, Va after replacing the fuse. 
3) In case there are no voltage of 5V, Va, Vs, the board is failure, it need to replace the board.
Pic. 2.
Pic. 1.
< DMM mode >
A7
Pic. 1. Fuse check
2010. 11. 16
Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
Y-Sus Board Checking Method(50R3)
Repair Process-Reference data
A8
A8
A9
▣ Check Method
① Check input voltages(5V, Va, Vs) at P103 connector. 
② Check it is short or not between Vs and GND at P103 connector. 
③ Check all of fuses open. (FS201, FS202, FS203, FS501) 
④ Check voltage of diode , FET by using digital multi-meter.
▣ Measurement method
0.4V~0.5V
Q610,Q612
0.45V~0.55V
Q608,Q609
0.45V~0.55V
Q601,Q602
0.35V ~ 0.45V
Q603,Q605
D604,D605
HS602
0.35V ~ 0.45V
Forward
O.L. (Overload)
Reverse
D602
HS603
0.35V ~ 0.45V
Forward
O.L. (Overload)
Reverse
Position
Direction
Circuit No.
HS601
D610
Q606,Q607
Forward
0.35V ~ 0.45V
0.45V~0.55V
Reverse
O.L. (Overload)
▣ Specifications
Diode
FET
HS603
HS601
HS602
YSUS board
FS202
5V fuse
FS203
Vs fuse
FS201
Va fuse
P113
2010. 11. 16
FS501
18V fuse
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