Block Diagram; Ic Block Diagram - Yamaha YST-SW45 Service Manual

■ BLOCK DIAGRAM

+
L
IC1A
2
-
3
INPUT 1
-
R
+
+
L
-
OUTPUT
-
R
+
L
INPUT 2
R
AUTO
POWER
H
SW2
L
OFF

■ IC BLOCK DIAGRAM

µ
●
PC4570HA (OP Amp.)
1
- +
1 2 3 4 5
Vcc Vo -Vm +Vm V
1 1 1 EE
● NJM4558L (OP Amp.)
● M51848L (CR Timer)
VR3
VOLUME
IC1B
1 6
IC7A
7 6
5
7
L.P.F
6dB/oct L.P.F
12dB/oct
HIGH
8
4
PWR
TIMER
IC5
6
7
+
SIGNAL
SENSOR
Q12
IC4
AUTO POWER ON/OFF CIRCUIT
2
+ -
6 7 8 9
+Vm -Vm Vo Vcc
2 2 2
IC7B
8 4
2
3
H.P.F
12dB/oct
CUT
VR2
D7
+B
+15 Q1,D2
POWER
REGULATOR SUPPLY
D1
3
-15 Q2,D3
-B
D19 D8
POWER
LED
Q11
SW1
+8
PWR
STANDBY/ON
SW
● NJM78L08A (Voltage Regulator)
● STK4036-2 (Amp.)
R1
TR1 TR2
1
2
6
4
R3
3
TR3
SUB
R2
∝
● PC1237HA (Protect IC)
YST-SW45
L.P.F
6dB/oct
2
RY1
13
IC9
L.P.F
1
6dB/oct
POWER
A.N.I.C
AMP
IC2,3,6
0.1
Q7
LIMITER
Q3, 6
D4,D5
4
IC8
PROTECTION
RY2
F1
POWER SW
SW5
RY2
T1
VCC
D11
IC10
V
IN
V
OUT
GND
15 7
14
TR7
TR4
C1
R7
TR8
R9
R4
13
TR5
D2
R5
TR9
R8
TR10
R10
12
D1
R6
SPEAKER
4