Panasonic SA-HT280 Service Manual page 70

SCHEMATIC DIAGRAM-4
P
36
1
4.6V
J
K
36
1
4.6V
N
R482
47K
I
9.2V
8 7
IC407
NJM4580DD
VREF
1 2
8.6V 8.6V
C1238
50V4.7
14.4V
8 7
IC1205
NJM4580DD
BUFFER AMP
1 2
0V
R1250
5.6K
C1246 C1296
50V4.7 0.047
:POSITIVE VOLTAGE LINE
:NEGATIVE VOLTAGE LINE
C980
50V4.7
9.2V 4.5V 4.6V
35 34 33 32 31 30 29 28
IC405
M62490FPE1
SOUND CONTROLLER
(VOLUME CONT.)
2 3 4 5 6 7 8 9
4.5V 4.6V
C481
50V4.7
C482
50V4.7
9.2V 4.5V 4.6V
35 34 33 32 31 30 29 28
IC406
M62490FPE1
SOUND CONTROLLER
(VOLUME CONT.)
2 3 4 5 6 7 8 9
4.5V 4.6V
C479
50V4.7
4.9V
4.6V 4.6V 4.6V
6 5
3 4
0V 0V
6 5
3 4
0V 0V -16.2V
C
:FM/ AM SIGNAL LINE
:CENTER SP SIGNAL LINE
C488
50V4.7
4.5V 4.6V 4.9V
27 26 25 24 23 22 21 20
10 11 12 13 14 15 16 17
4.5V 4.6V 0V
C485
50V4.7
C484
50V4.7
4.5V 4.6V 4.9V
27 26 25 24 23 22 21 20
10 11 12 13 14 15 16 17
4.5V 4.6V 0V
C472
50V4.7
R1265
R1263 C1261
4.7K 22K 16V10
IC1206
C1263 NJM2115D
390P
BUFFER AMP
4.9V 2.4V 2.4V 2.4V
8 7 6 5
1 2 3 4
2.4V 2.4V 2.4V
C1265
150P
R1269
10K
R1267
10K
D B
:SURROUND SP SIGNAL LINE
:SUB WOOFER SIGNAL LINE
9.2V
4.9V
R491
1K
N
0V
19
18
R489
0V
1K
O
T
U
4.9V
R490
1K
0V
19
18
R486
0V
1K
V
W
C1262
16V10
X
R1266
4.7K
IC1207
NJM2115D
C1264
390P
BUFFER AMP
4.9V 2.4V 2.4V 2.4V
8 7 6 5
1 2 3 4
2.4V 2.4V 2.4V
C1266
150P
R1270
10K
R1268
10K
R1271
10K
A
-16.2V
14.4V
4.9V
4.9V
2.6V