Block Diagram - Yamaha YST-SW325 Service Manual

A B
YST-SW325
1
I BLOCK DIAGRAM
+
L
IC1A
3
+
–
–
2
INPUT 1
–
2
R
+
+
L
–
3
OUTPUT
–
R
+
L/MONO
4
INPUT 2
R
5
6
7
10
C D
SW7
HIGH CUT FILTER
VR1
PASS
SW1
VOLUME
PHASE
SELECT
OFF OFF
IC1B IC2A
NORM
1 6 4
IC3B
– +
7 2 5
5 3 +
+
– 6
–
REV
L.P.F. L.P.F.
6dB/oct 12dB/oct
HIGH CUT
VR2
OFF
L
R72
H
AUTO STANDBY
SW2
MUSIC
+
SENSOR
C39
OFF
IC6
Q9
L
AUTO POWER
H
ON/OFF CIRCUIT
E F
SW3
B.A.S.S.
PASS MOVIE MOVIE
MUSIC MUSIC
IC4A IC4B IC3A
7
3 5 3
+ 1 + 7 + 1
2 6 2
– – –
+
H.P.F. H.P.F.
12dB/oct 12dB/oct
LIMITER
Q5, 6
8
4
3
TIMER
Q10, 11
IC7
6
7
+B
+15
–15
–B
Q3
REGULATOR
STANDBY/ON
D6
D10
SW4
D2 D3
Q4 G R G R
G H
+B
POWER
PS AMP Q24C, 32
AMP
RY1
8
4
+
11
13
IC9
3
– 10
6
PS AMP Q24A, 33
–B
A.N.I.C
IC5
IC8
Q29, 31
PROTECTION
Q23, 28, 30, 34
POWER SUPPLY
RY2
D21
F1
Q18
Q19
SUB
POWER SUPPLY
D1
T1
REGULATOR
Q1, 2
IC8
D4
(R, L models)
POWER
INDICATOR
I J
DRIVER
+
–
0.1
POWER
SW5