Kenwood TS-440S Serivce Manual page 27
Hf transceiver
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Also See for TS-440S:
- Service manual (131 pages) ,
- Instruction manual (58 pages) ,
- Instruction manual (50 pages)
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TS-440S
SEMICONDUCTO R
SN74LS138H (Control unit IC51)
Data
outputs
TRUTH TABL E
Input
Outpu t
Enable
Selec t
G,
G
2
C
B
A
Yo
Y,
Y
2
Y
3
Y,
Y
5
Y
6
Y
7
x
H
x
x
x
H
H
H
H
H
H
H
H
L
x
x
x
x
H
H
H
H
H
H
H
H
H
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
H
H
H
H
H
L
H
H
H
H
H
L
H
L
L
H
H
H
H
L
H
H
H
H
L
H
L
H
H
H
H
H
H
L
H
H
H
L
H
H
L
H
H
H
H
H
H
L
H
H
L
H
H
H
H
H
H
H
H
H
H
L
Note : 1 . G 2 =G 2A+G 2 B
2 . H : High leve l
L : Low leve l
X : "H" or "L"
2 7
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