JVC SX-DW303 Service Manual page 7

TC74HC00AF (IC503) : CMOS
1. Pin layout / Block diagram
TC74HC14AF (IC504, IC571) : CMOS
1. Pin layout / Block diagram
NJM311M (IC502) : Comparator
1. Pin layout
Vcc 4B
14 13
2
1
1A 1B
Vcc 6A
14 13
2
1
1A 1Y
(TOP VIEW)
1
GND
+INPUT 2
-INPUT 3
V -
4
4A 4Y 3B 3A
12
11 10 9
6
3 4 5
1Y 2A 2B 2Y
6Y 5A 5Y 4A
12
11 10 9
6
3 4 5
2A 2Y 3A 3Y
V +
8
7 OUTPUT
6 BAL/STROBE
BAL
5
SX-DW303
3Y
8
7
GND
4Y
8
7
GND
1-7