Marantz SR110/F1S Service Manual page 22

IC105:BU4052B
Block diagram
Logic circuit diagram
V (16)
DD
INH (6)
LEVEL
A (10)
CONVERTER
B (9)
V (8)
SS
V (7)
EE
X (12)
0
X (14)
1
X (15)
2
X (11)
3
Y (1)
0
Y (5)
1
Y (2)
2
Y (4)
3
Y 1
0
Y
2
2
Y
Y
2
COMMON
3
Y
Y
OUT / IN
Y 4
3
Y
3
Y
1
Y
5
1
INH
INH
6
V
EE
B
V
7
EE
V
8
SS
BINARY TO 1of 4
DECODER WITH INH
(13) X
(3) Y
16 V
DD
15 X
2
0
X
2
14 X
1
X
1
X COMMON
13
OUT / IN
X
X
0
12 X
0
X
3
11 X
3
A
10 A
9
B
Truth table
INH A
L L
L H
L L
L H
H X
X: Irrelevant
30
B ON SWITCH
L X Y
0 0
L X Y
1 1
H X Y
2 2
H X Y
3 3
X NONE