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A
B
SCHEMATIC DIAGRAM (YST-SW205)
1
Q Q
3 7 6 3 1 5 1 5 0
INPUT 1
11.8
11.8
0
0
0
0
L.P.F.
2
0
0
0
-11.9
3
0
100
H.P.F.
L.P.F.
11.8
-11.9
4
0
0
0
0
0
0
T E
L
1 3 9 4 2 2 9 6 5 1 3
5
6
7
w w w
PIN CONNECTION DIAGRAM OF TRANSISTORS,
DIODES AND ICS.
8
2SA970
2SA1015
.
2SA1145
2SC1815
2SC2240
2SC2705
2SC2878
E
C B
9
C
D
E
B.P.F.
L.P.F.
0
-11.9
8.6
0
8.0
0
8.6
0
0
0
0
0.7
0
0
0
LIMITER
0
-11.8
0
0
0
0
0
0
-11.9
11.8
-0.1
0.1
0
0
0
0
0
0
0.1
0.1
1.9
0.6
0
7.3
7.9
C91
0.01
SG
A.N.I.C
11.8
0
0
0
0.3
0
0
0
0
-11.8
0
-11.9
POWER SUPPLY
0
18.7
11.8
0
-18.7
18.7
0
AC
28.9
0
-18.7
-11.9
SUB POWER SUPPLY
5.7
0
12.0
5.7
AC
12.0
x
a o
y
2SK304
2SA1837
2SC4688
2SC1846
1SR139
D3SBA20
S1NB20
2SC4793
2SA1695
i
1SS133
2SC4468
MTZJ3.6B
MTZJ12.0C
MTZJ24.0B
S2L20U
Anode
–
–
~
E
~
B C
E C
C B
B
E
C E
Cathode
B
+
F
G
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8
PRE DRIVE
66.1
66.1
65.1
4.4
65.6
66.1
4.4
3.3
65.5
65.1
65.1
65.1
1.8
0.6
1.8
1.2
1.2
IDLING CURRENT ADJ.
0.6
0.6
0.1
0.1
-65.7
-65.7
-1.0
-65.7
-1.6
-1.6
-1.0
-65.7
-64.9
-65.7
-66.7
-4.2
-65.7
-65.7
-64.9
-66.6
-3.6
-65.5
-66.6
-65.5
-4.2
-66.7
AC
97.7
POWER SUPPLY
0
-66.7
66.1
0
Q
0
Q
3
7
6
3
-1.5
0
11.8
0
0
0
0
11.9
7.9
0
AUTO POWER ON/OFF CIRCUIT
11.8
7.9
0
6.7
0.2
3.9
6.6
0.2
3.9
0.7
0
0
u 1 6 3
NJM78L08A
NJM78M12FA
NJM79M12FA
M51848L
µPC4570HA
µPC1237HA
.
+
9
8
~
OUT
3: OUT
3: IN
IN
1: OUT
1: COM
COM
2: COM
2: IN
~
1
1
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H
I
2
4
9
9
1.8
-1.0
POWER DRIVE
PS AMP
-1.6
66.1
66.1
66.1
65.7
65.5
66.1
65.5
66.1
65.9
66.1
66.1
2.7
65.9
2.7
3.3
2.7
3.3
66.1
2.7
1.2
0
2.7
0.6
2.7
A
66.1
0.6
0.1
66.0
66.0
0
0.1
0.1
DC 30 mV to 200 mV
0.1
-0.5
-0.5
-2.7
-2.7
-1.0
-2.7
0
-69.7
B
-2.7
-3.6
-3.3
-66.7
-2.7
-2.7
-66.7
-66.7
-66.7
-66.7
-66.0
-66.7
-66.3
-66.7
-66.7
3.3
2.1
0.7 0
2.0 0
0.1 0
PROTECTION
6.0
25.1
0.8
6.6
1
5
1
5
0
8
9
2
4
0
1.4
6.6
7.9
5.3
6.4
6.4
7.9
5.2
1.4
0
0
6.6
x: NOT USED
O: USED / APPLICABLE
m
c o
# All voltage are measured with a 10MΩ /V DC electric volt meter.
NJM4558L
# Components having special characteristics are marked s and must be
replaced with parts having specifications equal to those originally
installed.
8
1
J
K
L
YST-SW205/SW305
IC1, 4, 7~9 : µPC4570HA
2
8
9
9
Dual OP-Amp
1
2
-
+
+
-
1
2
3
4
5
6
7
8
9
Vcc Vo
1
-Vm
1
+Vm
1
V
EE
+Vm
2
-Vm
2
Vo
2
Vcc
IC3 : µPC1237HA
Protector
Vcc
7
8
Relay
Overload
Vcc on
1
drive
6
detect
mute
circuit
Flip flop
circuit
Mid-point
AC OFF
2
potential
detect
detect
Latch / automatic
return select
5
3
4
GND
IC5 : M51848L
CR Timer
R
R
R
–
+
FLIP-
FLOP
1
2
3
4
5
6
7
8
IC6: NJM78M12FA
Voltage Regulator
INPUT
OUTPUT
COMMON
9
8
2
9
9
IC10: NJM79M12FA
Voltage Regulator
COMMON
OUTPUT
INPUT
IC11: NJM4558L
Dual OP-Amp
1
2
3
4
5
6
7
8
IC12: NJM78L08A
Voltage Regulator
V
IN
V
OUT
GND
E-16/J-12
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