TX·7
430
Control key and diode matrix connections
K3('1) K2(
111)
KI
(II)
KII( 12)
' -
--
Sg(2)
M4 /M 14 M3 /
MIJ
M2/M 12 MI
/MII
Sr(3)
MH
/MI
H
M
7/M17
MU
M I(,
M
5/M1
5
-
--
----
S
e(4)
I'IU
,SET
MIIJIM20
M3/M
IY
SC
A N
_ .
---
..
_-
-.
--
S
d(5)
S I-
f1n
LW M W
" M
Sc(6)
A U
TO
M
EM
OI
~
Y
I)
OWN
UI'
MAN
UAL
Sb(
7) HI -l l L
l'NIJ
I) IS I'
I.A
Y
I'R
O
GI
~
A
M
W I
DEI
N A R
IW
W
--
-
- -
---
-
Sa( H)
'l0/'ik
Hz '
LW
2 ' L W I
'A
M
- -
-----
[) I (I H) ' I3A N I) 0
' IJA N D I
' I
11tH
ST
AT
IC/
DY
N A
•
Dio
de
111"1
rix
rnblc I
llA
N DIl BA N D I
I
~E GI
O
N
FI~E
QUEN
C
Y
C I IA NN E L
H
AN
G E S
I'A
CE
-- - _ .
-
D7 J0
1)70 '1
0
0
U S .A . R7.'1- 107.'1M Hz 200k H,.
1 I Europe 87 .50-
I08
.00 M H z
50k
Hz.
A M
IOkH ,J9
kH
z
FI~
E
Q
UE
N
C
Y
I
~A
N
GE
CII ANN EL SI'AC E
D711
lJ
0
530- 1620 kH z 10kH z
0
--
I
1
522
- 16 1l k
Hz
9k
Hz
11
53 1- I
W2k
Hz
'1k Hz
.-
0 :
Op
en I:
Co
nue ct
the
diocle (I S
SI3
3) . tnhle 2
11
: Open I: Councct the diod e ( 1
.'1.'1
133) .
iable 3
n A N DII,
DANDI
.. ..
"M
I" I/\(I oc llillgs . Se e tnble 2.
lO
/lIkH
z .
....
AM
I
,,"
\(I oe ll illgs . See tub le 3.
3. Muting circuit
lro m
mUl
in9 Ou
IPU!
0 ' c o o
trou
er rc
070
2 ri1\ '12
Lch
from
TKC
020
4
8
,-
- -
-,
0 106
011 2
0 7 15
R7 5 3
M
ONO
Re h
01 03
FM IF &
AM rad io
svstam
16
0 20 1
S
tereo
dec
oder
The
rn
uting
cir
cuit
operat es in the follo
wing
case s ,
1.Wb ile pi1l 4 2 o f co ut roller IC ou t pu ls thc high lcvc l.
Q207
and
Q208 ar e
tumed
on and
muting
is
clo
sed in
the follow ing "cascs
.f
Ü
While
th e m anu al
UP
/DOWN
swi tch
is
being
held
down.
(2)When
a st at ion in th e m
emory
is
recalled
.
and
(3)
Whil
e a
radi
o sta tion is be ing received
using
aut
o search
tuning
.
2.
When
an FM st a tion is not being rec
eive
d (a nd
the
muti
ng s
witch
is on) .
Thc IF levcl in thc I:M
110
systcru (
sct
a t
IUOI
SO
llllll
ili g
is 0 I'C llC U a t 17 .Zd Br
and
zer o-c
ross
d ct c
cti
ou
c
irc
u it
(Iuning
po int 55k Hz
(100kHz
step) :
30kHz.
(5 0 kHz. st cp) -arc o utput
a
t p iu R th rough the A ND circuit. Wheu a sla t ion is tur ued ,
tlie o
utp
ut goe s to lhe 10
11'
levcl .
"'h
en ou tput gocs 10 t he 1
011'
level,
Q1l
5 t ur ncd of'I,
Q I 16 is tu rn ed
Oll
a nd
Q207
nn d Q2
08
a re
tunr
ed o ff,
so
rnut
ing is
operred.
At
the
sarne
, pin 16 of
ster
eo
de cod er Q201 g
oes
to th e low level . so
the
VCO
osc illa tor st
art
s ,
-1
0-
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