G2 Circuit Diagram - Yamaha Strings SS-30 Service Manual

SS-30 (S/ # l00 l ~ )
Master
OSC
f=125KHZ
I1(15)
RA-G4-14(17)
14(17)
Master
OSC
f= 125KHZ
I2(27)
RA-G4-24(26)
24(26)
DE(5)
RA-G1-DE(3)
RA-G2--26(61) -26(3)
RA-G1--26(62)
-9(60)
RA-G1--9(58)
-26(61)
RA-G3--26(3)
RA-G2--26(3)
-14-
G2
Circuit Diagram
Divider
Divider
-8.2V Regulator
-15V Regulator
Gate and Sustain time Control
C#0
(48')
D0
(62')
D#0
(60')
E0
(45')
F0
(57')
F#0
(55')
G0
(43')
G#0
(40')
A0
(52')
A#0
(50')
B0
(38')
C1
(36')
C#1
K2-D1(26)
(21')
D1
K2-D2(24)
(7')
D1
K2-D3(22)
(9')
E1
K2-D4(20)
(24'
F1
K2-D5(18)
(12')
F#1
K2-D6(16)
(14')
G1
K2-D7(14)
(26')
G#1
K2-D8(12)
(28')
A1
K2-D9(10)
(
16')
A#1
K2-D10(8)
(19')
B1
K2-D11(6)
(31')
C2
K2-D12(4)
(33')
C4 Key
ATTACK SLOW-OFF
SUSTAIN -MIN
Note)
1.
Transistor Tr1
2.
Diode
3. IC
Same numbers are connected in common.
(123)16L
RA-LF-I7(53)
(124)16U
RA-LF-I5(50)
(74)8L
RA-LF-I6(47)
(73)8U
RA-LF-I1(5)
2SA509:
ZD : 02Z82A
others : IS1555
IC1, 2 : YM25400
IC3~6 : LM3211