Yamaha spx2000 Service Manual page 21

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3 7 63 1515 0
TC74VHC14FT (XV890A00)
Hex Inverter
MAIN: IC208
1
1A
2
1Y
3
2A
2Y 4
5
3A
6
3Y
7
GND
TC74VHC244FT (XW234A00)
Octal 3-State Bus Buffer
MAIN: IC403
1G
1
2
1A1
3
2Y4
TE
L 13942296513
1A2
4
5
2Y3
1A3
6
7
2Y2
8
1A4
9
2Y1
(GND) Vss
10
SN75124NSR (XV930A00)
Triple Line Receiver
MAIN: IC406
1A
1
1B
2
2R
3
2S
4
2A
5
2B
6
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2Y
7
GND
8
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TC74VHC32FT (XY945A00)
Quad 2 Input OR
MAIN: IC012
14 VDD
13
6A
12
6Y
11
5A
10
5Y
9
4A
8
4Y
TC74VHCT245AFT (XT744A00)
Octal 3-State Bus Transceiver
MAIN: IC103-106, 203, 606
VDD (Vcc)
20
2G
19
1Y1
18
2A4
17
1Y2
16
2A3
15
1Y3
14
2A2
13
1Y4
12
GND
2A1
11
TC7SH04FU (XS775A00)
Inverter Gate
MAIN: IC003, 210, 402, 605
Vcc
16
1S
15
1R
14 GND
1Y
13
3A
12
3S
11
3R
10
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2 9
8
1A Vcc
1 14
1B 4B
2 13
1Y 4A
3 12
2A 4Y
4 11
2B 3B
5 10
2Y 3A
6 9
GND 3Y
7 8
1
D1R
Vcc
20
2
19
A1 G
18
3
A2
B1
Q Q
3 6 7 1 3
17
4
A3
B2
16
A4 5
B3
15
A5 6 B4
14
A6 7 B5
13
A7 8
B6
A8 12
B7
9
11 B8
10
NC VCC
1 5
IN A
2
3 4 OUT Y
.
9 4 2 8
TC74VHC74FT (XV892A00)
Dual D-Type Flip-Flop
MAIN: IC206
1
1CLR 14
2
13
1D D
D
3
12
1CK CK
4
1PR 11
PR
CK
5
Q 10
1Q
PR
6 9
Q
1Q Q
7
GND 8
Q
INPUTS OUTPUTS
PR CLR CLK D Q
L H X X H
H L X X L
L L X X H
H H f H H
H H f L L
H H L X Q
O
74LVX4245MTCX (X3097A00)
Dual Supply Octal Bus Transceiver
MAIN: IC101, 102
VCCA
1 24
0
DIR 2
1 A 23
A1 3
2 B 22
1 5 0 5 8 2 9 9 4
A2 4
3 D 21
A3
5
4 D 20
A4
6 19
5 G2
A5
7
6 G1 18
A6 8 7 15
17
A7 9 16
8 14
10 13 15
A8 9
GND 11 10 12 14
11
GND 12 13
µPC4570G2 (XF291A00)
Dual Operational Amplifier
MAIN: IC601, 602, 651, 652, 703, 753
Output1
1 +V
CH1
Inverting
2
Input 1
- +
CH2
Non-Inverting
3
Input 1 + -
-DC Voltage Supply
4 -V
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SPX2000
9 9
VCC
2CLR
2D
2CK
2PR
2Q
2Q
Q
L
H
H
L
H
Q
O
VCCB
VCCB
/G
2 8 B1 9 9
B2
B3
B4
B5
B6
B7
B8
GND
+DC Voltage Supply
8
Output2
7
Inverting
6
Input 2
Non-Inverting
5
Input 2
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