Schematic Diagram - Yamaha YST-RSW300 Service Manual

A B C

SCHEMATIC DIAGRAM

MAIN
1
MAIN (3)
L
11.9
OUTPUT/
0
IC11
0
INPUT 1 0
R
2
PHASE
L
0
IC11
0
0
-11.9
INPUT 2 REV
L.P.F.
NORM
R
AUTO STANDBY CIRCUIT
The voltages are measured
AUTO STANDBY
with AUTO STANDBY OFF.
OFF HIGH
LOW
3
0.1
8.1
IC4
6.9
4.0 6.8
IC4
1.4
0
4.0
MUSIC SENSOR
MAIN (4)
STANDBY/ON
4 W4B W4A
STATUS
INDICATOR
0.3 0.3
0.3 2.1
11.0
-11.9
0.1 IC7
0.1
IC7
5 0.1
MAIN (8)
0.1
L.P.F.
H.P.F.
U, C, K, A, B, G models R, L models
6
MAIN (6) MAIN (6)
POWER POWER
TRANSFORMER TRANSFORMER
7
MAIN (11) MAIN (7)
MAIN (9)
8
W9A
W8A
230V-240V
220V
110V
120V
9
MAIN (2)
AC IN
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
10
2SA970 2SA1837 2SC1815 2SC4688
STD03P
2SA1015 2SC4793
2SA1145
2SC2240
2SC2705
2SC2878 1
4
2SC4449
1
E E B 2 3 5
B C C
C B C B
E 4 5
E
3
D E F
0
-11.9
IC10
0 0
11.9
0
IC10
0 0
W3 CB3
TIMER
IC201
6.3
0
0
0.3
0.9
0.3
7.5
8.1
6.1 6.7
0.1
CB4 CB9
0.1
HIGH CUT
VOLUME
40 to 140Hz
6.7
5.6
PROTECTION
6.8
6.8
6.1
-17.2 6.7
0
0.1
6.7
0
0.3
0.7
0 0
W6A1
REGULATOR
AC 26.7 0
IC6
-17.5 17.5 17.5
11.9
W6A2 0
0
0
W6A3
-17.5 -11.9
IC1
CB7 CB8
CB5 CB6
W9A
W8A
AC
1-2, 5-6
POWER
46.5
2-3, 6-7 ON/OFF
W11B W11A
24.4
3-4, 7-8
4-5, 8-1 W12B W12A
0
24.7
MAIN (5)
MAIN (2)
AC IN
1SS133 1SR139
STD03N D5BA20-4001 6A S1NB20 1A 200V
1SS176 1SR400
MTZJ12C
EL02ZLF
MTZJ24B Anode S2L20U
Anode
MTZJ5.6B
3
4
4
1 1
- 3
AC
1 2
AC
2 3 2 3
+
4 5 Cathode
Cathode
5
G H
MAIN (1)
67.6
67.0
67.0
66.9
66.4
66.4
0.8
1.2
MAIN (10)
PRE DRIVE
0.5
0.8 0.8
0.1
0.2
-67.0
0.5
-67.1 -1.0
-67.0
-67.1 -66.5
-67.1
-67.0
-67.1
-67.7 -67.7
0.1 0.1
0.1
0.1
0.1
0.1
LIMITER
W2 CB11
W5A1
0
AC 98.4
-67.8
67.6
W5A2
0
W5A3
0
0
PROTECTION
-17.2
-17.3
0.9
-16.5
1.4
1.4
1.4 0.4
0 0.8
-12.8 1.8 0.1
-2.6
0.1
1.3
0
0
0.8
0
REGULATOR
IC202
8.1
11.2
0
11.2
54.6
11.2
54.6
11.7
11.2
0.1
54.6 11.2
0.1
0 0.7
0
G/R LED (SPR-39MVWF) LB8555D NJM4558L NJM78L08A-T3 NJM78M12FA
1
8
3 1 1: OUTPUT
ANODE ANODE 4 2: GND
(Green) (Red) 3: IN
2 3 2 2 8
1 3: INPUT 1: OUT
CATHODE 1 2
1 1 3 2: COM
I J K
67.6
POWER
67.6
DRIVE
67.3
0
67.3
1.2
67.3
0
67.6 5.7 5.3
0 0
67.5
0
67.5
0 0
0.1
0.1
-2.6
5.7
0.1 PS AMP
0.1
0.1
-5.5
0.1
0
0
0
-5.1
-5.5
0
-67.8
0 -67.6
-67.6
-67.8
-67.8
A.N.I.C.
0.1
11.9
0.1
-11.9 0.1
0.1
0.1 IC8
0.1
0.1 0.1 IC8
0.1
0.1
0.1
0
36.1 35.8 23.7
23.7
0.1
µPC4570HA-A
NJM79M12FA
9
3: COM
1: OUT
1
2: IN
L M N
YST-RSW300
IC1: NJM79M12FA
Voltage regulator
COMMON
OUTPUT
INPUT
CB10
+
DRIVER
WOOFER
–
0
0
IC4, 7, 8, 10: µPC4570HA-A
Dual operational amplifier
+
V
R
1
Q 7
Q Q
5 14
Q
11
Q 13
Q 8
R 7 Q
16
I Q Q Q 9
I 1 2
R R
I 6 8
N R 9
R 5 C 2
Q Q
12 15
Q
6
OUT
Q 3 Q 4 Q 10
D
R 10
R R R
2 C 1 3 4
V -
1 2
- + + -
1 2 3 4 5 6 7 8 9
V OUT I I V I I OUT V
+ 1 I1 N1 - N2 I2 2 +
IC6: NJM78M12FA
Voltage regulator
INPUT
OUTPUT
COMMON
IC11: NJM4558L
Dual operational amplifier
V+ 8
2, 6 1, 7
–INPUT OUTPUT
+INPUT
3, 5
V– 4
1. A OUTPUT
2. A-INPUT
A R
3. A+INPUT
- + + -
4. V-
5. B+INPUT
6. B-INPUT
7. B OUTPUT
1 2 3 4 5 6 7 8
8. V+
IC201: LB8555D
General purpose timer
8
Vcc
THRESHOLD
6
7 DISCHARGE
CONTROL
5
R
VOLTAGE
S Q
TRIGGER 2 3 OUTPUT
RESET 4
1
GND
1 8 Vcc
GND
TRIGGER 2 7 DISCHARGE
OUTPUT 3 6 THRESHOLD
RESET 4 5 CONTROL VOL.
180mm 180mm 200mm
180mm 180mm 200mm
IC202: NJM78L08A-T3
Voltage regulator
V IN
V
OUT
GND
# All voltages are measured with a 10MΩ/V DC electronic voltmeter.
# 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.
13