Panasonic TH-42PX20U-P Service Manual page 173

TO
P-BOARD
PA5
!
(P5)
1
12V
2
12V
3
A 5V
4
STB5V
5
GND
6
GND C2381
50V
7
+12Vs 10u
8
+12Vs
JS2107
9
GNDs
JS2106
10
GNDs
11
DR15V
B
SCL1
SDA1
TO
DG-BOARD
PA6
(DG6)
1
C
L_IN
2
GND
3
R_IN
4
GND
5
NC
6
GND
7
SUBMONO
8
GND
9
NC
10
SUBMUTE
11
(AMUTE)
12
GND
13
SCL1
14
SDA1
15
GND
16
SP_MUTE
17
STB5V
D
18
RESET
19
POFF_DEF
20
MAIN_DEF
E
F
TH-42PX20U-P
PA-BOARD (1 of 3) Schematic Diagram
1 2
PA-BOARD TXNPA1QKSU (1/3)
IC2304
AVR 9V
AN7709SP-E1
+9V
NR14V JS2303
1 OUT 3
IN
L2306
C2413 C2414
ELJPA100KF
50V COMMON 16V
47u 2
47u
IC2102
AVR 12V
AN7712SP-E1
+12V
1 OUT 3
NR14V IN
C2112
C2113
50V COMMON
16V
47u 2 47u
+9V
C2428
16V
100u
+9V
MUTE CCT.
STB5V
Q2303
R2372
2SD0601A0L
22k
RESET
R2373
5.6k
Q2304
Q2308
2SD0601A0L
2SD0601A0L
R2374
100k R2377
470
R2378
100k
POFF-DEF
JS2304
MAIN_DEF
3 4
R2408 C2408
33k 50V R2414
R2418
4.7u 47k 47k
C2420
50V
560p
C2418
C2416 50V C2422
560p
R2406 22 SCL1 50V 50V
560p 560p C2424
R2415
50V
SDA1 100k
1800p
R2405 22
R2419
C2429 100k R2423
50V 47k
0.01u
IC2401 SOUND CTRL
C1BB00000800
R2401 R2427
5.6k L-IN 100
C2412
NP 50V
R2409
0.01u R2416 R2420
4.7k
C2401 C2403
R2403 R2412 100k 47k
50V 50V 100k
22k
1800p 4.7u C2407
C2423 C2425
50V
C2419
25V 50V
5600p 25V
0.033u 1800p
0.033u
R2402
C2417 C2421
R2428
5.6k 25V
R-IN 25V R2417
100
NP 0.033u
0.033u 56k
R2413
C2404
R2404 C2402
50V 56k
22k 50V
4.7u
1800p
=
+12V
L2350
0 R2353
10k
C2354
25V
47u
D2350
Q2307
MA2J11100L
2SA207700L
MONOMUTE
D2351
C2358 R2384
MA2J11100L
50V 100k
0.01u
R2350
R2379 R2380
68k
47k
22k
C2357 C2350
50V 50V R2364
R2367
22u Q2350
22u
5.6k 330
2SC584500L
+ +
IN
R2494 R2351
R2356
R2382 10k
820
100k R2354
47k
1/2W
100
Q2315
C2382 2SC584500L
R2383 R2362
R2371
Q2355
16V 100k 100k
180k R2355
100u 2SC584500L
1.8k
D2311
MA3X152K0L
MONOMUTE
R2359
100
5
200Hz LPF
R2422
39k
L2430
0
C2426 R2435
50V
1800p
+9V
C2431
C2430
50V
16V
0.01u
100u
VCC
L
R
C2427
50V
1800p
R2421
39k
400Hz HPF
C2440
R2444 R2442
50V
22k
1k
0.01u
C2443 R2445
16V
1k
100u VCC
L
R
Q2352
2SC584500L
D2352
MA2J11100L
R2358
10
+
R2363
C2353
R2357
1/2W
16V
10 Q2351
220u 33
2SA207700L
C2356
16V Q2354
100u
2SA207700L
Q2353 Q2356
2SC584500L 2SC584500L
R2352
1k
R2361
R2366
C2351
1M 1k
50V
22u R2360
47k
TH-42PX20U-P PA-BOARD (1 of 3) Schematic Diagram
6 7
22k
C2436
16V
0.027u
IC2402
C0ABBA000073
GND
C2432
16V
0.027u
C2445
50V
0.012u
C2442
50V
0.012u
IC2403
C0ABBA000073
GND
C2441
50V
0.012u
C2444
50V
0.012u
8 9
1
2
3
4
5
6
7
8
9
10
11
12
13