NAD T 763 Service Manual page 49

T89C51RD2
KEYBOARD: U201 & U202
74HC4051
KEYBOARD: U208
4
1
CHANNELS
IN/OUT
6
2
COM OUT/IN
3
7
CHANNELS 4
IN/OUT
5
5
INH
6
V
7
EE
GND
8
49
74HC4051
V
16
2
15
1
14
0
13
3
12
A
11
B
10
C
9
CC
CHANNELS
IN/OUT