Yamaha AD824, Service Manual

Page: 16 / 80

AD824
16
IC BLOCK DIAGRAM
HD74LV04AFPEL (IS000400)
HD74LVU04AFPEL (XY102A00)
Hex Inverter
MAIN: IC914,920
HD74LV08AFPEL (IS000800)
Quad 2 Input AND
MAIN: IC912
HD74LV32AFPEL (IS003200)
Quad 2 Input OR
MAIN: IC926
HD74LV74AFPEL (IS007400)
Dual D-Type Flip-Flop
MAIN: IC907,919
SN74LV138ANSR (IS013810)
SN74LV138AFPEL (IS013800)
3 to 8 Demultiplexer
MAIN:
HA:
SN74LV139ANSR (IS013910)
Dual 2 to 4 Demultiplexer
MAIN: IC915
TC74HC153AFEL (XY309A00)
Dual 4 to 1 Data Selectors
MAIN: IC910,913
HD74LV157AFPEL (IS015700)
Quad 2 to 1 Multiplexer
MAIN: IC935
SN74LV174ANSR (IS0174100)
Hex D-Type Flip-Flop
MAIN: IC929
1
2
3
4
5
6
7
1A
1Y
2A
2Y
3A
3Y
Vss
14
13
12
11
10
9
8
VDD
6A
6Y
5A
5Y
4A
4Y
1
2
3
1A
1Y
4
2A
5
2B
6
2Y
7
VSS
1B
14
13
12
VDD
4A
11
4Y
10
3B
9
3A
8
3Y
4B
1
2
3
1A
1Y
4
2A
5
2B
6
2Y
7
GND
1B
14
13
12
Vcc
4A
11
4Y
10
3B
9
3A
8
3Y
4B
INPUTS OUTPUTS
PR CLR CLK D Q Q
L
H
H
L
H
Q
O
H
L
H
H
L
Q
O
X
X
X
H
L
X
X
X
X
f
f
L
H
L
L
H
H
H
L
H
L
H
H
H
1
2
3
4
5
6
7
1CLR
1D
1CK
1PR
1Q
1Q
GND
14
13
12
11
10
9
8
VCC
2CLR
CLR
2D
D
2CK
CK
2PR
PR
2Q
2Q
Q
Q
CLR D
CK
PR
Q
Q
IC917
IC009
1
2
3
4
5
6
7
A
A
Select
Enable
Output
Output
B
B
C C
G2A G2A
G2B G2B
G1
G1
Y7 Y7 Y5
Y4
Y3
Y2
Y1
Y0
Y6
16
15
14
13
12
11
10
Vcc
YO
Y1
Y2
Y3
Y4
Y5
8 GND 9 Y6
1
2
3
4
5
6
7
1G
1A
1B
1Y0
1Y1
1Y2
1Y3
A
G
B
Y0
Y1
Y2
Y3
16
15
14
13
12
11
10
Vcc
2G
2A
2B
2Y0
2Y1
2Y2
8 GND 9 2Y3
Y2
Y3
Y1
Y0
B
A
G
1
2
3
4
5
6
7
1G SELECT
STROBE B
OUTPUT 1Y
1G
IC3
IC2
IC1
IC0
1Y
16
15
14
13
12
11
10
Vcc
SELECT 2G
STROBE A
8
GND
9
OUTPUT 2Y
2C0
2Y
2C1
2C2
2C3
2G
B
B
B
B
A A
A
A
DATA
INPUTS
DATA
INPUTS
1
2
3
4
5
6
7
SELECT
1A
1A
1B
1B
1Y 1Y
2A
2A
2B
2B
2Y 2Y
16
15
14
13
12
11
10
Vcc
STROBE
G
4A
S3
Y
4A
4B 4B
4Y
4Y
3A
3A
3B 3B
8
GND
9
3Y
Q
Q
D C K C K
C K D C K
G G
CLEAR
1Q
1D
2D
2Q
3D
3Q
GND
1 16
2 15
3 14
4 13
5 12
6 11
7 10
8 9
Vcc
6Q
6D
5D
5Q
4D
4Q
CK
Q
D
G G
Q
D C K
G
C K
Q
D
G
Q
D