Ic Block Diagram - Yamaha AD824 Service Manual

AD824

IC BLOCK DIAGRAM

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