Yamaha O2R96 Service Manual page 65

TC74VHC139F (EL) (XW324A00)
CPU1: IC125
JK1: IC401
Dual 2 to 4 Demultiplexer
1
1G 16 Vcc
G
2 G
15
1A 2G
A
A
3
14
1B 2A
B
B
4 13
1Y0 2B
Y0
5 Y0 12
1Y1 2Y0
Y1
6 Y1
11
1Y2 2Y1
Y2
7 Y2
1Y3 10 2Y2
Y3
Y3
8
GND 9 2Y3
HD74LV175AFPEL (IS017500)
JK2 (1/2): IC802
Quad D-Type Flip-Flop
CL 1 VDD
16
2 15
1Q 4Q
Q CL CL Q
CK CK
Q D D Q
3 14
1Q 4Q
4
1D 13 4D
5
12
2D 3D
6
11
2Q Q D D Q 3Q
CK CK
Q CL CL Q
7
2Q 10 3Q
8
Vss 9 CK
TC74HC238AF (XT163A00)
PN1: IC101
PN2: IC108, 109, 500
3 to 8 Line Decoder
A
Select
B
Inputs
C
G2A
Enable
G2B
Inputs
G1
Y7
GND
TC74VHC157F (EL) (XT475A00)
DSP: IC608-611, 655-658
Quad 2 to 1 Multiplexer
SELECT 1
2
1A
1A
3 1B
1B
4
1Y 1Y
5
2A
2A
6 2B
2B
7
2Y 2Y
8
GND
TC74VHC244F (XT800A00)
CPU1: IC118
DSP: IC904, 905
JK1: IC455, 459
JK2 (1/2): IC903, 904
Octal 3-State Bus Buffer
1G
1
2
1A1
3
2Y4
1A2
4
5
2Y3
1A3
6
7
2Y2
8
1A4
2Y1 9
(GND) Vss
10
1
2
3
4
5
6
7
8
HD74LV165AFPEL (IS016500)
PN1: IC104, 105
PN2: IC102, 103, 503
8-Bit Shift Register
16 Vcc
G 15
STROBE
4A 14
4A
4B 13 4B
PARALLEL
INPUTS
4Y 12
4Y
3A 11
3A
OUTPUT
3B 10 3B
9 3Y
VDD (Vcc)
20
CLEAR
2G
19
1Y1
18
2A4
17
1Y2
16
2A3
15
1Y3
14
2A2
13
1Y4
12
2A1
11
16 Vcc
15 Y0
14 Y1
13
Y2
12
Y3
11 Y4
10 Y5
9 Y6
SHIFT/
1
16 Vcc
LOAD
CLOCK
2 15
CLOCK
INHIBIT
3
E D 14
E D
4
F F C 13 C
PARALLEL
INPUTS
5
G B 12
G B
6
H A 11
H A
SERIAL
SERIAL
7 Q 10
H
INPUT INPUT
Q
H
Q
H
OUTPUT
8
GND 9
Q
H
MM74HC273SJX (XY198A00)
FD1: IC104-109
FD2: IC104-107
TC74VHC273F (EL) (XY254A00)
JK1: IC404-406
JK2 (1/2): IC801, 909
Octal D-Type Flip-Flop
1 20
VCC
2 19
1Q 8Q
Q Q
CL CL
3 18
D CK CK D
1D 8D
4 17
2D 7D
D CK CK D
CL CL
5 16
Q Q 7Q
2Q
6 15
6Q
3Q
Q Q
CL CL
7 14
D CK CK D 6D
3D
8 13
5D
4D
D CK CK D
CL CL
9 12
Q Q 5Q
4Q
10 11
GND CLOCK
Data
A 1
Output
B 2
C
3
G2A 4
G2B 5
G1
6
Y7 7
GND 8
02R96
16 Vcc
15
Y0
14 Y1
13 Y2
12
Y3
11
Y4
10 Y5
Y6
9
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