A
B
C
D
E
F
G
H
I
J
K
L
YST-SW015
11
SCHEMATIC DIAGRAM
1
2
3
4
5
6
7
8
9
L.P.F.
TIMER
AUTO POWER ON/OFF
B.A.S.S.
H.P.F.
R, T, K models
R, T, K models
R, T, K models
U, C, A, B, G, J models
U, C, A, B, G, J models
L.P.F.
POWER ON/OFF
SUB POWER
SUPPLY
POWER SUPPLY
REGULATOR
REGULATOR
REGULATOR
VOLTAGE SELECTOR
HIGH CUT
STANDBY/ON
VOLUME
★
All voltages are measured with a 10M
Ω
/V DC
electric volt meter.
★
Components having special characteristics are
marked
s
and must be replaced with parts having
specifications equal to those originally installed.
★
Schematic diagram is subject to change without
notice.
x: NOT USED
O: USED / APPLICABLE
8
7
6
5
4
3
2
1
OUT
1
–Vcc
+IN
2
–IN
2
OUT
2
+Vcc
+IN
1
–IN
1
IC1: NJM4558L
Dual OP-Amp
1
8
IC2, 4, 7:
µ
PC4570HA
Dual OP-Amp
Vcc
Vo
1
-Vm
1
+Vm
1
V
EE
+Vm
2
-Vm
2
Vo
2
Vcc
1
2
3
4
5
6
7
8
9
+
+
-
-
1
2
1
9
IC3 : TA7317P
Protector
1
6
2
3
8
7
4
9
Muting
circuit
Constant voltage
power supply circuit
Schmidt
circuit
Power supply
ON/OFF
detecting circuit
Discharging
circuit
5
Substrate
Overcurrent
detecting circuit
OR circuit
±
Current voltage
detecting circuit
GND
1
9
Relay drive
circuit
IC5: LB8555D
Timer
1
VCC
8
DISCHARGE
7
CONTROL VOLTAGE
5
THRESHOLD
6
+
–
TRIGGER
GND
2
RESET
4
+
–
R
S
Q
1
4
8
OUTPUT
3
IC8: STK404-070
AF Power Amp
1
3
2
4
5
6
7
8
9
10
R1
R4
R5
C1
C2
D1
TR3
TR5
R3
R6
TR4
SUB
R2
TR1
TR2
TR6
TR7
TR8
1
10
V
IN
V
OUT
GND
OUT
COM
IN
IC9 NJM78L08A
Voltage Regulator
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SB1642
2SD2531
2SK304
2SC4688
1SS133
MTZJ12.0C
MTZJ15.0C
MTZJ24.0B
S1NB20
2SA970
2SA1015
2SC1815
2SC2878
2SC2240
D3SBA20
NJM4558L
NJM78L08A
µ
PC4570HA
TA7317P
STK404-070
LB8555D
Anode
Cathode
~
+
~
–
+
–
E
C B
B C
E
B
C E
S
G
D
PROTECTION
LIMITER
POWER AMP
A.N.I.C
L.P.F.
INPUT
0
0
0
4.0
0
0
1.4
0
1.3
2.4
2.4
5.4
8.0
1.4
6.7
8.0
0
6.7
4.0
0
14.6
0
0
0.1
1.9
0
0
0
0
0.6
7.4
8.0
0
0
0
0
0
14.6
0
0
0
0
0
0
0
0
0
0
0
0
14.5
13.9
0.7
0
0
0
0
-14.6
25.7
0.6
3.0
1.3
0
1.1
-0.7
0
0
0
-0.7
0
38.9
-39.1
-1.1
1.2
1.8
14.6
-38.6
0
0.2
0.2
-13.9
0
1.1
6.1
6.7
35.8
14.6
-36.1
-15.1
0
0
15.1
-39.1
0
-14.5
13.6
0.1
8.0
0
13.7
0
6.4
6.5
0
0.1
6.7
38.9
0
15.1
-15.1
-7.9
-14.5
-14.5
14.6
0
0
0
14.6
-0.3
0
-1.8
0
0
-0.2
0
0
0
-0.2
0
AC
58.0
AC
12.9
C65
0.022
3.3K
2P 0.22
220/10
100K
100K
Q15
DT
A114ES
VS82250
VS82250
VS82240
KB00071
KB00071
2A 125V
2A 125V
1.6A 125V
T500mAL250V
KB00071
T500mAL250V
T500mAL250V
