Panasonic SC-AK48, Service Manual

Page: 50 / 104

1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
22K
10K
22K
15K
27K
3.3K
3.9K 1.8K
22K
22K
IC301
M62456FPE1
BTL BASS BOOST
2
1
3
4
5
6
7
8
9
10
11
P.GND
GND
+B(4)
-B(1)
FAN1
+B(2)
+B(6)
-VP
LED9V
+B(5)
CN301
FAN2
+B(1)
CN300
2
1
3
4
5
6
7
8
9
10
11
GND1
+B(3)
H.Lch OUT
H.Rch OUT
L.Rch OUT
/CD
HP SW
GND
P.CONT
DC DET
12
12
1
2
CP303
Q352
KRA102STA
DC DET.
Q307
KRC111STA
DC DET.
Q311
KRC111STA
DC DET.
D307
DAP202KT146
D306
DAP202KT146
D309
1SS355TE17
D313
1SS355TE17
R317
1K
C331
50V4.7
R313
39K
R316
15K
M
FAN
MOTOR
U
R
T
R312
2.2
C334
50V10
R338
4.7K
G A F E B D C
D308
1SS355TE17
C325
10V47
C324
10V47
R335
4.7K R435
27K R332 820K
D315,D317
1SS355TE17
D315 D317
R232
3.9K
R357 100K R356
15K
D201
R230
47K
C234 0.068
R234
2.2K
C240
50V3.3
C241
100P
R231
18K
R240
43K
C235
6800P
D201
1SS355TE17
R440
43K
D401
1SS355TE17
R430
47K
D401
C441
100P
R431
18K
C435
6800P
C434 0.068
R432
3.9K
R434
2.2K
C440
50V3.3
C436
100P
R444
22K
R342
18K
R334
240K
R336
18K
R337
8.2K
C322
0.068
C321
10V33
R343
6.8K
C323 0.068
C327
0.1
C328 0.047
C326
8200P
R339
82K
R340
82K
SCHEMATIC DIAGRAM-11
To POWER
AMP CIRCUIT
(CP500)
on
SCHEMATIC
DIAGRAM-16
L
To
POWER
AMP
CIRCUIT
(CP501)
on
SCHEMATIC
DIAGRAM
-16
L
L.Lch OUT
:FRONT MID/HIGHT SP DRIVE SIGNAL LINE
:FRONT LOW SP DRIVE SIGNAL LINE :NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE :CD SIGNAL LINE
- 7.9V
- 7.9V
14.6V
7.7V
10V
9V
5V
0V 0V 0V 7V 7.7V 0V 0V 0.1V 2.1V 0V
0V 0V 0V 0V 0V 0V
-7.9V 0.1V 0V 0V 0V
-0.6V
5.1V
4.2V
4.2V -0.6V
-3.4V
5.1V
SA-AK48
50