JVC RX-6030VBK Service Manual page 25

4.17 TC74HC08AF-X(IC611) : AND gate
• Block diagram
1A 1
1B 2
1Y 3
2A 4
2B 5
2Y 6
GND 7
(TOP VIEW)
4.18 TC74HC4053AF-X (IC581) : Multiplecer
1Y
1
0Y 2
IZ 3
Z-COM 4
0Z 5
INH
6
V
7
EE
GND 8
4.19 TC74HC4072AF-X (IC612) : OR gate
• Block diagram
1Y
1
1A
2
1B
3
1C
4
1D
5
NC 6
GND 7
14 VCC
13 4B
12 4A
11 4Y
10 3B
9 3A
8 3Y
16
Vcc
15
Y-COM
14
X-COM
13
1X
12
0X
11
A
10
B
9
C
14 Vcc
13 2Y
12 2D
11 2C
10 2B
9 2A
8 NC
• Truth table
A B Y
L L L
L H L
H L L
H H H
CONTROL INPUTS
INHIBIT C B
L L L
L L L
L L H
L L H
L H L
L H L
L H H
L H H
H X X
X : Don't care.
• Truth table
A B C D
H X X X
X H X X
X X H X
X X X H
L L L L
X : Don't care
RX-6030VBK
A
K
H
K
H
K
H
K
H
X
Y
H
H
H
H
L
(No.22026)1-25