Panasonic SA-HT280 Service Manual page 78

SCHEMATIC DIAGRAM-12
G
MAIN CIRCUIT
C406
100P
E401
JK401
Lch
PHONO
Rch
CP401
DVD L
1
A
To IN/ OUT DVD R
2
TERMINAL A.GND
3
CIRCUIT(CN401) A.GND
4
on SCHEMATIC SW OUT
5
S IN L
DIAGRAM-2 6
S IN R
7
CP402
1
+B(1)
A
To IN/ OUT
2
-B(1)
TERMINAL
3
CK 63
CIRCUIT(CN402)
4
DT 63
on SCHEMATIC
5
ST 63
DIAGRAM-2 6
V SELA
7
V SELB
CP403
1
PH L
A
To IN/ OUT
2
PH R
TERMINAL
3
A.GND
CIRCUIT(CN403)
4
TU L OUT
on SCHEMATIC
5
TU R OUT
DIAGRAM-2 6
V.GND
7
V.GND
CP101
T.GND
1
+B(1)
2
SD
3
+B(2)
4
To TUNER UNIT DET
5
on SCHEMATIC Rch IN
6
DIAGRAM-18 CE
7
Lch IN
8
DI
9
DO
10
CL
11
:POSITIVE VOLTAGE LINE
:NEGATIVE VOLTAGE LINE
C457
10V33
IC451
AN6558F
R453 C451
820 50V4.7
PHONO EQ AMP
-16.2V
4 3
5 6
0V
R454 C452 C456
820 50V4.7 1000P
A
B
C
D
F
E
14.4V
-16.2V
E
F
G
A
B
A
B
R442
47K
R441
47K
D401
MTZJ7R5CTA
C440
0.01
C
D
E
F
G
H
A B C D
CP1201 CP1202
1 2 3 4 5 6 7
B
To SURROUND
CIRCUIT(CN1201) on
SCHEMATIC DIAGRAM-5
:FM/ AM SIGNAL LINE
:CENTER SP SIGNAL LINE
R463 R461
12K 180K
C461 C459
R457 R459 C463
6800P 0.022
270 68 50V4.7
C455
1000P
0V 0V 0V
2 1
7 8
0V 0V 14.4V
R460 C462 C460 C464
68 6800P 0.022 50V4.7
R464 R462
12K 180K
B A
C586 R584
16V10 2.7K
A
D
-16.2V
14.4V
E F G I J A B C D G
CP1203
1 2 3 4 5 6 7 1 2 3 4 5 6
B B
To SURROUND To SURROUND
CIRCUIT(CN1202) on CIRCUIT(CN1203) on
SCHEMATIC DIAGRAM-5 SCHEMATIC DIAGRAM-5
:SURROUND SP SIGNAL LINE
:SUB WOOFER SIGNAL LINE
SL3
C537 R579
16V33 2.2K
R535 C579
1K 16V33
C581
120P
IC652
SL4 NJM4580DD
R581
18K
BUFFER AMP
0V 0V -16.2V
1 2 3 4
8 7 6 5
14.4V 0V 0V
R582
18K
SR4
C582
120P
R536 C580
1K 16V33
SR3
C538 R580
16V33 2.2K
B C
Q551-554
2SD1915FTA
MUTING
R595
0V
1K
0.6V
Q551
R596
1K
0.6V
Q552
0V
R597
0V
1K
0.6V
Q553
R598 C535
1K 0.1
0.6V
Q554
0V
R593
8.2K
C3
C585
16V33
K
L
M
N
O
D
P
CP1204
7 1 2 3 4 5 6 7
B
To SURROUND
CIRCUIT(CN1204) on
SCHEMATIC DIAGRAM-5
A
B
C
C539
0.1
D501
RVD1SS133TA