Panasonic SA-HT280 Service Manual page 69

SCHEMATIC DIAGRAM-3
B
SURROUND CIRCUIT
JK403
R ch
DVD
L ch
OUT 1
JK1301
GND
2
TV
(OPTICAL)
Vcc
3
DIGITAL
OUT 1
JK1302
GND
DVD 2
(OPTICAL)
Vcc
3
OUT 1
JK1303
GND
CD 2
(OPTICAL)
Vcc
3
C1320
0.1
E1301
CN1001B
CM IN
1
SW IN
2
C IN
3
RS IN
4
LS IN
5
R IN
6
C
To DTS
L IN
7
CIRCUIT
+B(7)
8
(CN1001)
OVL/ ERR
9
on SCHEMATIC
A.GND
10
DIAGRAM-7
AD RIN+
11
AD RIN-
12
AD LIN-
13
AD LIN+
14
PDN
15
Z1307
D IN3
16
CN1002B
D.GND
1
D.GND
2
D.GND
3
+B(6)
4
Z1306
D IN2
5
Z1304
+B(5)
6
+B(5)
7
D IN1
8
C
To DTS
POWER
9
CIRCUIT
CS42
10
(CN1002)
CD OUT
11
on SCHEMATIC
CD IN
12
DIAGRAM-7
C CLK
13
CS49
14
CS RESET
15
NC
16
17
INT REQ
SCD OUT
18
CA16
19
CA17
20
:POSITIVE VOLTAGE LINE
:NEGATIVE VOLTAGE LINE
R404
1K
R403
1K
C1301
15P
C1302 R1303
0.01 47
R1301
3.3K
4.9V
C1308
15P
C1307 R1309
0.01 47
R1308
3.3K
4.9V
C1304
15P
C1305 R1306
0.01 47
R1304
3.3K
4.9V
C1310
0.1
C1319
0.1
R1310 C1318
10 0.01
C1313
25V47
A
B
C
D
E
F
4.9V
A
B
A
B
C
D
Z1308 Z1302
Z1303
4.9V
2.6V
Z1305
C
D
E
F
G
H
I
J
K
L
M
:FM/ AM SIGNAL LINE
:CENTER SP SIGNAL LINE
IC404
TC9162AN
SIGNAL SELECTOR
(AUDIO)
-16.2V
1 Vss
1
0V
2
G
2
0V
3
H
0V
4
I
3
0V
5
4
6
0V
J 7
5
0V
8
9
9
0V
10
K
7
0V
11
L
0V
12
R446
10K
0V
M 13 STB
14 GND
C1225 R1233
16V33
D
0V 0V
14 13 12
1 2 3
0V 0V
C1245 C1241 C1232
50V4.7 330P
C1239 C1234
3900P 16V10
C1237
16V33
B
C1226 R1234
16V33 1K
C
:SURROUND SP SIGNAL LINE
:SUB WOOFER SIGNAL LINE
14.2V
V
DD 28
1
0V
27
2
0V
26
25
3
0V
24
4
23
0V
22 N
5
0V
O
21
9
20
0V
P
19
7
0V
Q
18
0V
17
R444
10K
0V
DATA R
16
R445
10K
0V
CLK 15 S
C1243
50V4.7
-16.2V
R1235
1K 6.8K
C1229
330P
-16.2V 0V 0V
11 10 9 8
Vss
IC1204
NJM2060D
BUFFER AMP
Vcc
4 5 6 7
14.4V 0V 0V
C1230 C1244
0.01 330P 50V4.7
14.4V
4.9V
4.9V
2.6V
R439
1K
R438
1K