JVC KS-FX202 Service Manual page 22

KS-FX202
HD74HC126P (IC751) : Changer control
1.Pin arrangement
1C 1
1A 2
1Y 3
2C 4
2A 5
2Y 6
GND 7
( TOP VIEW )
3. Block diagram
1A
1C
2A
2C
3A
3C
4A
4C
1-22
2. Pin function
14 Vcc
13 4C
12 4A
11 4Y
10 3C
9 3A
8 3Y
Input
C A
L X
H L
H H
Output
Y
Z
L
H
1Y
2Y
3Y
4Y