Ic Block Diagram - Yamaha DA824 Service Manual

IC BLOCK DIAGRAM

HD74LV04AFPEL (IS000400)
HD74LVU04AFPEL (XY102A00)
Hex Inverter
MAIN: IC911,915
1
1A 14
VDD
2
13
1Y 6A
3
12
2A
6Y
4 11
2Y 5A
5 10
3A
5Y
6 9
3Y
4A
7
Vss 8
4Y
HD74LV74AFPEL (IS007400)
Dual D-Type Flip-Flop
MAIN: IC914
1
1CLR 14
VCC
2
D 13
1D 2CLR
D
3
12
1CK CK
2D
4 11
1PR PR 2CK
CK
5 Q 10
1Q
2PR
PR
6
9
Q
1Q Q 2Q
7
GND 8
2Q
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
1G SELECT 1 16 Vcc
STROBE B 2
15 SELECT 2G
1G
3 14 STROBE A
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 OUTPUT 2Y
HD74LV08AFPEL (IS000800)
Quad 2 Input AND
MAIN: IC912
1A
1
1B
2
1Y
3
2A
4
2B
5
2Y
6
VSS
7
SN74LV138ANSR (IS013810)
3 to 8 Demultiplexer
MAIN: IC913
1
A
Select
2
B
3
C
4
G2A
Enable
5
G2B
6
G1
Output
7
Y7
GND 8
Q
L
H
H
L
H
Q
O
HD74LV245AFPEL (IS024500)
Octal 3-State Bus Transceiver
MAIN: IC901,903-905,907,908,924
DA: IC101
1
D1R
2
A1
3
A2
4
A3
5
A4
DATA
INPUTS
A5 6
A6 7
A7
8
A8
9
GND
10
HD74LV32AFPEL (IS003200)
Quad 2 Input OR
MAIN: IC928
VDD
14
4B
13
4A
12
4Y
11
3B
10
3A
9
3Y
8
SN74LV139ANSR (IS013910)
Dual 2 to 4 Demultiplexer
MAIN: IC920
16 Vcc
A
B Y0 15
YO
14
C Y1 Y1
13
G2A Y2 Y2
Output
G2B 12
Y3 Y3
11
G1 Y4
Y4
Y7 Y5 10 Y5
Y6
9 Y6
HD74LV273AFPEL (IS027300)
Octal D-Type Flir Flop
MAIN: IC922
20 Vcc
19
G
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
B8
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
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
1 20
CLEAR VCC
2 19
1Q 8Q
Q Q
CL CL
3 D CK CK D 18
8D
1D
4 17
7D
2D
D CK CK D
CL CL
5 Q Q 16
7Q
2Q
6 15
6Q
3Q
Q Q
CL CL
7 14
D CK CK D 6D
3D
8 13
4D 5D
D CK CK D
CL CL
9 12
4Q Q Q 5Q
10 11
GND CLOCK
DA824
13