Panasonic TH-42PX500UA, Service Manual, Page: 14 / 26

5.2. P-Board Block Diagram
- +
- +
+ +
D510
D509
X501
4NHz
Q527
D534
D536
R661
1
2
3
D545
D544 D542
D521
VR352
1
2
3
D535
PR509
D532
D531
D530
D568
Q409
Q408
Q413
Q412
D417
D420
D419
C467
D404
D462
D511
PR501
D444
D401
D505
D555
D563 R544
D567
PR503
R671
VR351
C555 C446
R443
1
2
3
L506
D529 D528
1
2
IC408
4
2
1
3
1
3
4
2
1
3
4
2
IC404
IC403
3 9 8
14
4 2
16
10
T401
5 8 7 6
VCC
MOS
DRIVE
CURR
DET
CURR
COMP
2 1 3 4
Q407
Q420
Q404
Q406
R406
D415
IC406
POWER
FACTOR
CORRECTOR
5
4
9
2
10 6
T402
Q535
8
6
10
7
9
2
3
4
1
15
19
24
18
22
23
16
17
21
20
VDD
VSS
XIN
XOUT
RESET
STB PS
PFC DET
F STB PC
ON/OFF
DISCHARGE
ECO ON/OFF
F STB ON/OFF
V LOW DET
AC P DET
TV ON/OFF
VSUS DET
STB ON/OFF
PS SOS
PFC ON/OFF
V LOW ON/OFF
IC501
1
3
IC502
RESET
1
5
2
4 6
3
T407
9
8
11
3
15
2
6
4
1
IC512
1
4
Vda
P12
+15V
+12V
TO
1
2
6
PB5
P5
+12V
+12Vs
4 +15V
+12Vs 7
+12Vs 8
1
+15V 2
+15V
P23
TO
SC23
9 +5V
TO
STB5V
7
P25
D25
+5V
10
Q421
POWER MCU
COLD
COLD HOT
10 STB_PS
4
1
5
3
IC402
Q422
7
8 STB12V
DC15V(V15)
DC12V(V12)
Q509
PB30
+15V
FAN SOS
5
4
3
P30
+5V
TO
FAN CONT
1
14 FAN SOS
Q550
Q557
2
3
1
16
17
15
18
12V 2
12V
3
1
FAN CONT
Q552
3
HOT
P POWER SUPPLY
4
Vda
Q508
13
14
PR601
9 6
5 4 3
5
ZCD
7
GD
8
VCC
1 3
VFF
4
CS INV
Q507
Q506
IC509
13
14
12
MAIN RELAY
RUSH RELAY
VSUS
ON/OFF
ALL OFF
11
Q561
Q559
13 F STBY ON
IC507
1 5 REG
Q544
ALL OFF
PS SOS
PANEL MAIN ON
ECO_ON
Q567
Q518 Q519
F STB 14V
2
1
3
F STB 14V
F STB 14V
P10
TO
PA10
12 16 15 13
2 4 6
IC520
5
PR401
PR402
Q401
4 7 8 5
3 2 1
Q435
Q423
R903-R906
R928-R931
Q424,Q434.Q436
L405 L404
F401
F402
1
4
NEUTRAL
RL402
RL403
R455,R474
R479,R481
R483,R488
Q430,Q432
Q433,Q441
Q417
IC407
Q438
Q431
Q439
Q440
4
2
4
2
IC409
3
1
1
3
3
14
13
10
18
9
6
15
16
SS12
TO
T601
REG
IC504
2 1
T410
T404
D539
LIVE
P9
2
ERROR DET
POWER
DC POWER
ERROR DET
COMPARATOR(PFC DET)
+5V REG
COLD HOT
AC CORD
TO
PFC DET
STB5V DET
ALLOFF SW
EXT Isen VIN
CE/SS CLK FB VSS
VlOW DET
VlOW DET
MAIN ON/OFF
RUSH ON/OFF
INV.
Vlow
Vlow POWER CIRCUIT
Vsus POWER CURCIUT
INV.
INV.
OSC
OSC
F STB 14V
D418
R464
R472
R473
R465
R496 R495 R494
Q418
R497
(350V 40V)
PFC OUT IC411
1
4
COMPARATOR(AC IN)
5
3
Q4O3
L403
Q503
Q501
Q502
Q551
Q505
R622
R648
R636
R626
R656
ERROR DET(Vsus)
IC506
1
3
REG
ERROR DET
IC503
1 2 REG
SW
Q553
Q554
SW
SW
Q560
Q564
Q558
Q562
INV
SW
Q565
ON:L
STB
OVER
VOLTAGE
PROTECTION
(8V
2V)
Q414
Q415
CONTROL
AC IN
(66.5V 3V)
DETECTION
Q511 Q512
H:ON
Q538
STB 5V ON
Q537
SW
2 Vda
73V
D569
D570
D571
R670
Q510,Q516
Q541
R650
R649
5V OUT
DETECTION
COUPLER
PHOTO
IC412
COUPLER
PHOTO
CONTROL
D579
R579
D549
R666
D551
R545
(16V 2V)
3
4 1
2
IC505
IC401
COUPLER
PHOTO
COUPLER
DC-DC
CONVERTER
Csus
Q530
Q525
R533
(3V 1.0V)
178V
(1.7A)
R627
Vsus
R526
R527
H:ON
Vdat OVER VOLTAGE
DETECTION(100V
25V)
VSUS OUT
DETECTION
(60V
40V)
OVER
VOLTAGE
PROTECTION
(490V
80V)
COUPLER
PHOTO
COUPLER
PHOTO
PHOTO
OVER
VOLTAGE
DETECTION
(490V
80V)
(Vda)
DETECTION
12V OVER
VOLTAGE
(16V 2V)
PROTECTION
INV.
COUPLER
PHOTO
SC2
TO
Vsus
1
2
TO
2 Vsus
P11
P2
Vsus
Vsus
SS11
3
SW
Q536
PFC
D427
D428
R444
R475
R441
R442
D435 D467
D441
1
R921
D552
Q517 Q520
R620
R589
R590
R621
R534
D574
D588
D572
OSC
OSC
Vda 70V
Vsus 188V(0.6A)
395V 395V
TH-42PX50U, TH-42PX500U
P-Board Block Diagram TH-42PX50U, TH-42PX500U
P-Board Block Diagram
TH-42PX50U / TH-42PX500U
14