Yamaha YST-RSW300, Service Manual

Page: 13 / 19

IC11
IC10
IC10
IC4
IC7
CB5 W9A
W8A
CB6
W11B W11A
W8A
CB7 CB8
IC202
W1
CB1
IC1
IC6
W6A1
W6A2
W6A3
W9A
W12A W12B
W8B W9B
W13A W14A W15A W16A W10A W7A
W8B
W13B W14B W15B W16B W7B W9B
W5B W6B W5B W6B
W10B
IC7
CB4 CB9
W2 CB11
IC8
IC8
CB10
W5A1
W5A2
W5A3
IC4
W4B W4A
IC201
W3
CB3
IC11
A
1
2
3
4
5
6
7
8
9
10
B C D E F G H I J K L M N
YST-RSW300
13
★
All voltages are measured with a 10M
Ω
/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.
SCHEMATIC DIAGRAM
MAIN
0
0
0
11.9
0
0 0
-11.9
0
0
0
-11.9
0
0
0
11.9
0.1
0.1
0.1
0.1
-11.9
0.1
0.1
11.0
0.1
4.0
8.1
6.9
6.8
4.0
0
1.4 0
0
6.3
0
1.4 6.7 8.1
8.1 6.3 6.3 5.4
0.3
0.3
2.1
0.3
0.3
0.3
0.9
7.5
8.1
6.1 6.7
AC 26.7
0 0
0
0
17.5 -17.5
-17.2
0.3
0.1
6.8
6.8
6.7
6.7
5.6
6.7
6.1
0.7
0
0
0
0
0
54.6
-17.5
17.5
-11.9
11.9
24.7
24.4
0
0
AC
46.5
0
0
0.1
0.1
0.7
11.2
11.2
11.2
54.6
11.7
54.6
11.2
11.2
8.1
0
-17.3
-17.2
-16.5
-12.8
1.8
1.3
-2.6
0
0
0.1
0.1
0
0
1.4
1.4 1.4
0.8
0.8
0.9
0.4
AC 98.4
-67.8 67.6
0
0
0.1 0.1
0.1
0.1
0.1
0
0.1
0.1
0.1
0.1
0.1
0.1
36.1 35.8 23.7
23.7
0.1
0.1
0.1
0.1
-11.9
0.1
0.1
0.1
11.9
-67.7 -67.7
-67.1
-67.1
-66.5
-1.0
-67.0
0.2
0.8
66.9
0.8
0.1
-67.0
-67.0
0.8
66.4
66.4
67.0
67.6
67.0
1.2
0.5
0.1
0.1
0.1
-5.5
-5.5
0.1
0.1
0
5.7
-5.1
-67.6
-67.6
-67.1
-67.5
-67.8
67.6
67.3
67.0
67.3
67.6
67.3
0
0 0
0 0
-67.8
0
0 0
0 0
-67.8
0
0.5
0.1
0
1.2
67.5
67.5
-2.6
67.6
67.3
0
-67.0
-67.1
-67.1
5.7 5.3
180mm
180mm
180mm
180mm
200mm
200mm
230V-240V 1-2, 5-6
2-3, 6-7
3-4, 7-8
4-5, 8-1
220V
110V
120V
IC6 : NJM78M12FA
Voltage regulator
INPUT
OUTPUT
COMMON
NJM78M12FA
1: OUT
2: COM
3: IN
IC1 : NJM79M12FA
Voltage regulator
COMMON
OUTPUT
INPUT
NJM79M12FA
1: OUT
2: IN
3: COM
IC4, 7, 8, 10 : µ PC4570HA-A
Dual operational amplifier
V + OUT 1 I I1 I N1 V - I N2 I I2 OUT 2 V +
1 2 3 4 5 6 7 8 9
+ + - -
1 2
µ
PC4570HA-A
1
9
IC201 : LB8555D
General purpose timer
LB8555D
RESET
OUTPUT
OUTPUT
RESET CONTROL VOL.
THRESHOLD
Vcc
DISCHARGE TRIGGER
GND
DISCHARGE
GND
TRIGGER
THRESHOLD
Vcc
CONTROL
VOLTAGE
4
2
+-
+-
5
6
8
R
S Q
3
1
7
1
2
3
4
8
7
6
5
1
4
8
IC11 : NJM4558L
Dual operational amplifier
2, 6
3, 5
1, 7
V+
–INPUT
+INPUT
V–
OUTPUT
NJM4558L
1
8
4
8
+
A
1 2 8
1. A OUTPUT
2. A-INPUT
3. A+INPUT
4. V-
5. B+INPUT
6. B-INPUT
7. B OUTPUT
8. V+
- +
R
-
3 4 5 6 7
PIN CONNECTION DIAGRAM OF TRANSISTORS, DIODES AND ICS.
+
AC
AC
-
D5BA20-4001 6A S1NB20 1A 200V
E
C
B
2SA970
2SA1015
2SA1145 2SA1837
B C
E
2SC4793
2SC1815
E
C B
2SC2878
2SC4449
2SC2240
2SC2705
2SC4688
B
C
E
NJM78L08A-T3
IC202: NJM78L08A-T3
Voltage regulator
VIN
VOUT
GND
3: INPUT
3
2
1
2: GND
1: OUTPUT
STD03P
1
2
3 4
5
1SR139
Anode
Cathode
1SR400
S2L20U
EL02ZLF
MTZJ5.6B
MTZJ12C
Anode
Cathode
MTZJ24B
1SS133
1SS176
V
+
R
1
Q
1
Q
2
Q
8
Q
13
Q
11
Q
12
Q
15
Q 14
Q
16
Q
7
Q 5
Q
3
Q
4
Q
10
Q
9
Q
6
R 2 R 3
R 5
R
6
R
8
R 9
R 7
C 2
C
1
R 4
R
10
D
I
I
I
N
OUT
V -
2
3
1
4
4
3
1
2
G/R LED (SPR-39MVWF)
1
ANODE
(Red)
ANODE
(Green)
CATHODE
2
3
3
2
1
STD03N
1
2
3 4
5
MAIN (3)
MAIN (10)
DRIVER
WOOFER
POWER
TRANSFORMER
POWER
TRANSFORMER
AC IN
POWER
ON/OFF
V
O
LTA
G
E
SELECT
O
R
STANDBY/ON
OUTPUT/
INPUT 1
INPUT 2
L
R
L
R
STATUS
INDICATOR
AC IN
MAIN (1)
MAIN (9)
MAIN (6) MAIN (6)
MAIN (8)
MAIN (4)
MAIN (11)
MAIN (5)
MAIN (2)
MAIN (2)
U, C, K, A, B, G models
MAIN (7)
AUTO STANDBY
VOLUME
HIGH CUT
40 to 140Hz
PHASE
The voltages are measured
with AUTO STANDBY OFF.
OFF
LOW
HIGH
REV
NORM
AUTO STANDBY CIRCUIT
POWER
DRIVE
PRE DRIVE
LIMITER
PS AMP
PROTECTION
PROTECTION
R, L models
+
–
MUSIC SENSOR
L.P.F.
L.P.F.
H.P.F.
REGULATOR
REGULATOR
TIMER
A.N.I.C.
1
5
2
3
1
4
3
5