Panasonic TH-42PX20U-P Service Manual page 384

350V
P
Power
T401
Supply
Board
Q401
Q420
R443
PFC
!
D401
- +
NEUTRAL
P9
LIVE
NEURTAL 1
LIVE 3
!
350V !
D404
T410
- +
8
IC409
!
6
4 5
2
1
D410
D409 4
3
Q416
4
Q403
3
HOT
TH-42PX20U-P
P-BOARD BLOCK Diagram
PFC DC400V
!
D419
PR401
10 9 8 4 3 2
Q410
Q404
Q411
Q406
D420 DRIVE
L402
14 16
D415
!
F405
AMP
Q414
!
L403
8 7 6 5
!
VCC
IC406
MOS Q415
CURR
DRIVE
DET
POWER
CURR FACTOR
COMP
CONTROL
1 2 3 4
Q407
Q421
IC402
1 4
IC404
1 8
!
2 7 2 3
3 6
4 5
1 4
IC403
D434
!
2 3
4 1
IC401
!
3 2
!
! RL401 RL402
14
D511
IC502
STB7V
RESET
15
D555
13
D510 Q535
D557
10 Q501 Q522
IC408 Q502 Q503
1
!
IC504
R
2
K A
COLD
HOT
! T404
7
5
Q412 9
!
8
13
12
11
2 14
Q413
!
1 2
7 8 10 9
T402
! 1 3 5
T407
6 4
!
DC180V
D539
!
T405
16 2
D530
D537
Q510
12 6
Q519
!
T403 Q518
Q515
10 2 Q545
9
3
7
8
5 Q504 Q514 Q525
Q528
5 6 7
Q CLR PR
IC521
Q D CK
3 2 1
Q512
4 6
IC522
3 1
STB7V
Q517
Q551
IC501
POWER MCA
1 20
VDD P00
2 19
VSS P01
1
TV ON/OFF
3 18
XIN P02
X501
4NHz
3
4 17
XOUT P03
5 P10 16
PS SOS
Q544
6 RESET P11 15
7 P21 P12 14
8 P20 P13 13
9 D3 D0 12
ALL OFF
10 D2 D1 11
COLD
DC85V DC75V
D531
Q527
D541
D543
D536
D544
D534
D545
K
D533
R665
R
Vda
A
DC15V
IC512
DC15V
DC12V
IC511
DC5V D535
1 5VAVR 4
PR509
!
D563
Q509
Q543
1 3
1
R661
2
Vlow
IC520
3
6 4
Q540 Q541
1 2 3
CK D Q
Q508
IC523 Q542
Q524
PR CLR Q
7 6 5
!
Q521
PR510
D564
Q516 Q520
Q513 Q506
R641
Q511 Vsus
R608
Csus
ALL OFF
P30
3
FAN SOS
1
VCC
P31
FAN SOS 3
VCC 1
FAN
P32
!
FAN SOS 3
PR502
Q531
VCC 1
D553
Q532
P33
Q530
FAN SOS 3
VCC 1
TO SS-BOARD
SS12
P12
1
Vda
2
Vda
10 STB_PS
4 +15V
TO PA-BOARD
P7
PA7
1
+15V
2
+15V
TO SC-BOARD
P23
SC23
1
+15V
2
+15V
TO SS-BOARD
P11
SS11
2
Vsus
3 Vsus
TO SC-BOARD
P2
SC2
1
Vsus
2
Vsus
TO PA-BOARD
P5
PA5
1
+12V
2 +12V
3 5V
4
STB 5V
7 +12Vs
8
+12Vs
11
+15V
TO D-BOARD
D549
D25
P25
1
+12V
D554
2
+12V
5
5V
7
FAN CONT
8
STB7V
D565
D505
D506
TO D-BOARD
P27 D27
2
TV ON/OFF
Q552 Q537
4 STB5V
6 FAN SOS
7 PS SOS
Q546
8 ALL OFF
TH-42PX20U-P
P-BOARD BLOCK Diagram