Panasonic SA-AK78 Service Manual page 37

SCHEMATIC DIAGRAM-11
K
MAIN CIRCUIT
R213
JK202
18K
Lch
C201
0.01
FRONT
R214
18K
Rch
R217
JK202
8.2K
Lch
SURROUND
R218
8.2K
Rch
R222
JK202
8.2K
S.WOOFER
C202
0.01
R221
5.6K
CENTER
R201
JK201
12K
Lch
AUX1
R202
12K
Rch
R205
JK201
12K
Lch
C203
0.01
AUX2
R206
12K
Rch
CN1
1
A
2
3 B
C
4
5
D
6
7
E
8
9 F
G
10
11 H
12
13 I
J
14
K
All manuals and user guides at all-guides.com
:POSITIVE VOLTAGE LINE
A B
B
D
-7.7V 0V 0V
1 2 3 4
V
EE
A
1 2 3
1 2 3
V
DD
B 30 29 28 27
7.7V 0V 0V
C
D
E
C
A
D E
A
B
-7.7V
4
C
IC202
M5218AFPE3
BUFFER AMP
5
0V
D
E
Q451
2SB621ARSTA
PLUNGER DRIVE
0V 13.6V 14.2V 14.2V 13.5V
13.6V
14.2V
14.2V
13.5V
13.6V
14.2V
14.2V
13.5V
Q452
0V 10K
DTC114YKA146
47K
PLUNGER DRIVE
:MIC SIGNAL LINE
:NEGATIVE VOLTAGE LINE
C
R225 33K
R227 2.7K
R229 4.7K
0V 0V 0V 0V 0V 0V
5 6 7 8 9 10 11
4 5 6 7 8
4 5 6 7 8
26 25 24 23 22 21 20
0V 0V 0V 0V 0V 0V 0V 0V
R226 33K
R228 2.7K
R230 4.7K
F
R286 22K
R241 R243 R245
56K 12K 10K
C215 C217 C213
680P 33P 50V4.7
0V 0V 0V
3 2 1
6 7 8
0V 0V 7.7V
C216 C218 C214
680P 33P 50V4.7
R244 R246
12K 10K
C219
0.01
37
:CD SIGNAL LINE
C235 R233
47P 4.7K
E
0V
12 13 14 15
NC ST Vss
IC201
NJU7313AMT2
INPUT SELECTOR
NC DATA CK
19 18 17 16
0V 0V 0V
R232
4.7K
F
R231
4.7K
G
A
B
R235
220
H
R236
220
I
7.7V
-7.7V
14.2V
SA-AK78