Ic Block Diagram - NAD T 742 Service Manual

IC BLOCK DIAGRAM

AC3 BOARD
U101: 74HC153
AC3 BOARD
U102: 74HC157
AC3 BOARD
U103: CS5333
14
A
2
B
1
1G
6
1C0
TG
5
1C1
TG
4
1C2
TG
3
1C3
TG
15
2G
10
2C0
TG
11
2C1
TG
12
2C2
TG
13
2C3
TG
2
1A
3
1B
5
2A
6
2B
11
3A
10
3B
14
4A
13
4B
15
G
1
A/B
TG
7
1Y
1G
B
1C3
TG
1C2
1C1
1C0
1Y
GND
TG
9
2Y
TG
4
1Y
7
2Y
9
3Y
12
4Y
43
1 16 VCC
2 15 2G
3 14 A
4 13 2C3
5 12 2C2
6 11 2C1
7 10 2C0
8 9 2Y
A/B 1 16 VCC
1A 2 15 G
1B 3 14 4A
1Y 4 13 4B
2A 5 12 4Y
2B 6 11 3A
2Y 7 10 3B
GND 8 9 3Y