G4 Circuit Diagram - Yamaha Strings SS-30 Service Manual

SS-30 (S/ # l00 l ~ )
DE(5)
RA-G1-DE(3)
RA-G3-DE(5 )
-26(3)
RA-G2--26(61)
RA-G3--26(61)
-9(60)
RA-G3--9(60)
-26(61)
RA-G4--26(3)
Master
OSC
f= 443KHZ
TP1
f= 500KHZ
I1(15)
RA-G4- 0(14)
14(17)
RA-G2- I1(15)
f= 125KHZ
Master
OSC
f= 443KHZ
TP2
f= 500KHZ
I2(27)
RA-G3- 0(14)
24(26)
RA-G2- I2(27)
Master Clock
f= 125KHZ
PC(.9)
RA-LF-VI(70)
f= 6.3HZ
-18-
G4
Circuit Diagram
Divider
K4 -D1(26)
K4-D2(24)
K4-D3(22)
K4-D4(20)
Divider
K4-D5(18)
K4-D6(16)
K4-D7(14)
K4-D8(12)
K4-D9(10)
K4-D10(8)
K4-D11(6)
K4-D12(4)
C6 Key
ATTACK SLOW-OFF
OSC
f= 500KHZ
(14) 0
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
(21')
D1
(7')
D1
(9')
E1
(24'
F1
(12')
F#1
(14')
G1
(26')
G#1
(28')
A1
(
16')
A#1
(19')
B1
(31')
C2
(33')
-15V Regulator -7.5V Regulator
-MIN
Note)
RA-G3-I1(136)
RA-G4- I1(15)
1. Transistor
Tr1
Tr2~4 : 2SC752
2.
Diode
ZD
others : IS1555
3. IC
IC1, 2 : YM25400
IC3~6 : LM3211
. Resistor F mrks: +/-1%
4. 4
5.
Same numbers are connected in common
(123)16L
RA-F-U5L(83)
(124)16U
RA-F-U6L(84)
(74)8L
RA-F-U6(74)
(73)8U
RA-F-U7(75)
: 2SA509
: 02Z82A
f= 250KHZ