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
Z-Sus Board Checking Method(50R3)
Repair Process-Reference data
A9
A9
① Check input voltages(5V, Va, Vs) at P203 connector.
② Check it is short or not between Vs and GND at P203 connector.
③ Check all of fuses open. (FS202)
④ Check voltage of diode , FET by using digital multi-meter.
▣ Measuring Method
▣ Specifications
0.45V~0.55V
Q102,Q103
0.5V ~ 0.6V
0.35V ~ 0.45V
Q106, Q109
Position
Direction
Circuit No.
HS101
D114,D118
Q107, Q110
Forward
0.35V ~ 0.45V
0.35V ~ 0.45V
Reverse
O.L. (Overload)
HS102
D109,D110,D108,D111 Q104,Q113,Q114
Forward
0.35V ~ 0.45V
Reverse
O.L. (Overload)
Diode
FET
ZSUS board
FS202
5V fuse
P203
HS102
HS101
2010. 11. 16
Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
Control Board Checking Method(50R3)
Repair Process-Reference data
A13
▣ Checking Method
A13
① Check input voltages(5V of P105 / 18V of P2) at control 
board.
② Check LED is on.
③ If LED doesn’t work, check crystal X1 output.
④ Check 3.3V, 5V IC.
⑤ Check MCM at VS_DA by using digital multi meter.
③ Check Crystal(X1)
① Check Input voltage
④ Check IC ( IC53, IC51 )
Check oscillation of Crystal
(Normal: 25 MHZ)
MCM Check point
(+)VS_DA / (-)  GND 
(Normal: 3.3V )
⑤ Check MCM
3.3V
Pin 14,15  : 18V
IC51
IC53
P2(18V)
Pin14, 15
5V
3.3V
GND
P105_FL1,FL2(5V)
② Check LED On
2010. 11. 16
Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
Mal discharge Symptom
Repair Process-Reference data
▣ Dark picture caused by Mal-discharge
A14
▣ Dot type Mal-discharge symptom
▣ Scan type Mal-discharge symptom
A14
2010. 11. 16
Making 
- 6-2
Revision 
PDP TV
Symptom
A. Picture Problem
PDP Module Rom Ver. Checking method
Repair Process-Reference data
A15
▣ Check by using Rom Label on control board
Rom ver. Label
▣ Check by using SVC Remote controller
Press “In-start” →Press ”0413”
→ Select Panel Control → Check Module Rom ver.
※Refer to the Module Rom upgrade manual 
for Rom upgrade.
USB Type Jig
A15
2010. 11. 16
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