Yamaha NS-SW300 Service Manual page 18

A B
NS-SW300/NS-SW200
1
+
L
2
-
INPUT 1
+
R
-
+
L
-
OUTPUT
+
3
R
-
L/
MONO
INPUT 2
R
INPUT 3
LFE
4
5
SYSTEM
CONNECTOR
6
7
18
C D
IC9B
IC6A
5
+ IC6B
2
7
-
IC7A
1 5
-
+
+ 7 2
-
6
1
3 -
+
6
3
L.P.F
12dB/oct
HIGH CUT
VR1
AUTO STANDBY
SW2
OFF
LOW
HIGH
IC9A
2
-
1 IC5
+
OFF
3 Music
Sensor
LOW
HIGH
AUTO STANDBY CIRCUIT
DCIN
STATUS
D1
Indicator R
E F
NS-SW200
SW1
PHASE
IC8B
IC7B IC8A
REV
5
5 3
+ 7
7 + +
7
1
-
-
-
2
6
6
NORM
VR1
VOLUME
H.P.F
12dB/oct
Q17,19
Protection
8
IC1
4
Timer
3
6
7
+
D41
+15
+
C61
Regulator
+
C62
-15
RY2
IC4
Q2,4
Regulator
Control
G
SW6
STANDBY/ON
G H
+B
Q43C,Q45A
Q25-Q32 Q33A,Q33C
PS Amplifier
Pre Drive Power Drive
-
+
Q43A,Q45C
PS Amplifier
-B
A.N.I.C
Q11,12,14,15
Limitter
Power
transformer
F1
D21
Q51
+
C85
Power
Supply
+
C86
Q52
T2
(U, T, A, B, G, L, H, J models) Sub-
transformer
D14
Q16,18,20,21
Sub-Power
Regulator
Supply
(R, S models)
T1
• See page 30 →
MAIN
SCHEMATIC DIAGRAM
I J
RY1
DRIVER
SUBWOOFER
R180
0.1
Q40,42
Q22,24
Protection
POWER
ON/OFF
RY2
SW5
AC IN