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Yamaha YST-SW011 User Manual Page 10

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2
ABCDEFGH I J
1
3
4
5
7
YST-SW011
6
10
★ All voltages are measured with a 10MΩV DC electronic 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.
★ 電圧は、内部抵抗10MΩの電圧計で測定したものです。
★
s
印のある部品は、安全性確保部品を示しています。部品の交換が必要な場合、パーツリス
トに記載されている部品を使用してください。
★ 本回路図は標準回路図です。改良のため予告なく変更することがございます。
IC1: STK404-070
AF Power Amp
13245678910
R1
R4
R5
C1
C2
D1
TR3
TR5
R3
R6
TR4
SUB
R2
TR1
TR2
TR6
TR7
TR8
1
10
STK404-070
1
9
1
9
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
2SB1642
2SD2531
2SK304 1SR139-400
1SS133
1SS176
MTZJ15.0C
MTZJ24.0B
2SA970
2SAKTA1266
2SC2240
2SCKTC3198
µPC4570HATA7317P
Anode
Cathode
E
C
B
B
C
E
S
G
D
RBV-402
–
+
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
Relay drive
circuit
IC2, 4, 5: µPC4570HA
Dual OP-Amp
Vcc Vo
1
-Vm
1
+Vm
1
V
EE
+Vm
2
-Vm
2
Vo
2
Vcc
1234 567 89
++--
12
0
0
0
0
0
0.1
0.1
0
-14.2
14.4
-14.2
-1.8
0
14.4
0
0
0
0
0
0
14.5
0
0
0
-14.3
0
0
0
0
0
0.1
0
0
0
0.2
0.2
0
-32.6
14.5
1.21.8
-1.1
-33.0
33.0
0.1
0.1
0.1
32.6
32.9
33.0
-0.7
-0.7
0
0
0
-0.7
1.1
0
1.4
3.2
23.9 1.1
0
0
-14.2
-0.2 0
0 -0.2
0
0
14.4
0
-0.3
-1.8
0
0
0
0
-30.1
+33.0
-33.0
14.430.3
15.0
15.0
0
0
-14.9
-14.9
-30.6 -14.3
AC 49.1
MAIN (3) MAIN (1)
MAIN (10)
MAIN (6) MAIN (7)
MAIN (6)
MAIN (2)MAIN (2)
MAIN (9)
MAIN (4)
3
4
9
2
7
6
5
8
7
6
9
3
2
5
4
8
6
7
5
8
3
2
4
1
R, T, K, L models
WH
L=220
BE
L=180
L.P.F.
VOLUME
L.P.F.
H.P.F.
LIMITER
PROTECTION
POWER AMP.
A.N.I.C.
POWER SUPPLY
REGULATOR
INPUT
DRIVER
s10
s10
s9
C18
R93, 94
0.068
4.7k
0.068
4.7k
0.033
WC05070
10.0k
L1s11
s12
XX
K1T25,0X12,0X15
ESD-R-25SD
C73 X 220PX
0.033
WC05070
10.0k
K1T25,0X12,0X15
ESD-R-25SD
220P
C73
S12
(J, U, C, R, T, L)
L=450
(K, A, B, G)
L=520
L1
s11
■ SCHEMATIC DIAGRAM
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1 2 ... 5 6 7 8 9 10 11 12 13 14 15 16 17 18

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