2
A
B
C
D
E
F
G
H
I
J
1
3
4
5
7
YST-SW225
6
10
IC1A
IC1B
IC3B
PASS
MOVIE
MOVIE
MUSIC
MUSIC
SW7
HIGH CUT FILTER
SW3
B.A.S.S.
PASS
ON
ON
AUTO STANDBY
SW2
AUTO POWER
ON/OFF CIRCUIT
VR1
VOLUME
L.P.F.
6dB/oct
L.P.F.
12dB/oct
3
6
1
5
7
IC4A
Q23, 28, 30, 34
3
2
1
D6
D10
D2
G
R
D3
G
R
Q4
2
HIGH CUT
VR2
PROTECTION
H
L
OFF
OFF
L
H
R72
C39
TIMER
IC7
MUSIC
SENSOR
IC6
8
4
6
3
7
Q9
+
REGULATOR
IC8
Q3
L
R
+
–
–
+
INPUT 1
L
R
INPUT 2
L
R
+
–
–
+
OUTPUT
IC2A
3
2
7
4
SW1
PHASE
SELECT
+
–
PRE DRIVE
Q13—17
Q20, 21
POWER
DRIVE
Q25, 26
LIMITER
RY1
IC8
IC5
Q5—8
0.1
Q24C, 32
PS AMP
Q24A, 33
PS AMP
–B
+B
H.P.F.
12dB/oct
+
+
–
–
+
–
+15
+B
–15
–B
REGULA
T
O
R
POWER SUPPLY
D21
Q18
Q19
F1
POWER
SW5
STANDBY/ON
SW4
(R, L models only)
REGULATOR
Q1, 2
D4
SUB
POWER SUPPLY
D1
RY2
T1
DRIVER
5
6
A.N.I.C
Q10, 11
+
+
+
IC3A
3
2
1
H.P.F.
12dB/oct
+
IC4B
5
6
7
+
–
–
–
–
■
BLOCK DIAGRAM
