Alinco DX-70, Service Manual

Page: 28 / 116

8) TC4S66F (XA0115)
Bilateral Switch
g ______
e l
IN/OUT [TJ
OUT/IN [ H
>
J5] VDD
C9
VSS |_3_L
--
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b □ □
9) NJM2904M (XA0224)
Dual Operational Amplifiers
B l o c k D i a g r a m
10) BU4052BF (XA0236)
Analog Multiplexer/Demultiplexer
L o g i c D i a g r a m
V
dd
(16)
o
-
INHIB1T
{6 ) o — l e v e l
A (10) o
— CONVE
RTER
B{9) H
Vss (8) o~
Vee (7) o—
Xo (12) o-
Xt (14) o—
X2{15) cv-
X3 <1 1) O-
Y
0
(1) o-
Y i(5 )o -
V? (2)
V3(4)
o
-
(13) X
{3)Y
y° [T
Y2 [T
COMMON Y [ T
Y3 [ T
Y1 [ T
INHIBIT j T
ve e [ T
v s s [ T
j :
t
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g«,
13) X COMMOM
12] XQ
ElX3
To] A
T )
b
T r u t h T a b l e
INHIBIT A
B ON SWITCH
L
L
L XO YO
L H L X1 Y1
L L H X2 Y2
L
H
H X3 Y3
H
X X NONE
X: Don’t Care