Panasonic SC-AK48 Service Manual page 56

SA-AK48
SCHEMATIC DIAGRAM-17
IC501
STK470-040
REGULATOR
1 2 3 4
14.5V 9.8V 10.4V 5.1V
R527
1.5K
A B
C549
100V10
Q519
2SB1436R
POWER SUPPLY
3.3V
D512
RVD1SS133TA
D518
RVD1SS133TA
14.8V
14.5V
7.7V
-7.9V
3.3V
5V
-31V
10V
:NEGATIVE VOLTAGE LINE
:POSITIVE VOLTAGE LINE
5 6 7 8 9 10
-27.8V -8.5V -7.9V 7.7V 14.8V 16.0V 28.0V 60V
C544
0.01
R590
1.5K
D524
C571
E
Q508 Q502
KTC3199GRTA KTC3199GRTA
5V
SWITCHING FAN MOTOR DRIVE
C
0V
0V
C525 R522
6.3V100 100
F
D505,506
MA700ATA
Q500
2SB621ARSTA
POWER SUPPLY
R544
10V
10K
A
R519
0V
0V
5.6K
Q507
KTC3199GRTA
R567 POWER SUPPLY CONT.
100K
A B
10V
9.5V
Q516
KTC3199GRTA
POWER SUPPLY CONT.
R551
9.5V
3.2V 2.2K
2.6V
Q509
KRC110MTA
SWITCHING
3.2V
0.2V
B D
:FRONT LOW SP DRIVE SIGNAL LINE
:FRONT HIGHT SP DRIVE SIGNAL LINE
11 12 13 14 15 16 17
29.2V 0V 0V -29.7V -60.7V
C552
0.01
R599
4.7K
1D3E
35V4700
D526 1D3E
C574 35V4700
R515
0V
56K
R514
0.2V
0V
10K
C507
Q515
16V33
2SC3940AQSTA
REGULATOR
Q500
14.9V
10V 0V
10V 15.1V
R518 R593
820K 820K
C515
A
0.1
B
Q501
2SB621ARSTA
REGULATOR
R529
4.7
-31V -38.2V
-31.6V
R521
150
R576 R575
47 47
RL501
Q512
2SC1740SSTA
RELAY DRIVE
R578
0V
3.3K
0.8V
D513
KBP152G4R5
C540
0.1
56
E
A
18
D
F
B
C
60V
D528
D528
RVD1SS133TA
D514
C550
1D3E
35V100
B A
5 2 1
6 4 3
C584
0.022
JK501
HIGHT
MID
Lch
LOW
SPEAKERS
(6 )
JK502
HIGHT
Rch
MID
LOW
C595
0.01
E500
E501
H501
1
2
3
4
5
6
7
8
9
10
11
12
13