TX-7430
Pin No .
Symb
ol Te rminal Dcscripiion
22 SO Sta tion det e
etor
signal input Input terminal for deteeting
whethcr
or not a brondcast signal is bcing
reeeived during uu
io-
tuning.
Stopped
by the high level.
2:\, 24 EOI, E02
Err
or ourpurs
Char
ge pum p ou tpur of thc phas e detecror with
cons
iirures the PLL. High
level is outpu t whcn t he dividcd oscillation frcqucucy is highcr rhan
ih
c
refcrencc frcqu cncy. In the op posiie case , low level is output. Floating
occ urcs whcn thc frcq ucucies match . T he o
utp
ur is npp licd 10 the varia ble
capaci
tor
diode in rhe fro nt
end
thr
ough rhc low pass filler Q
I04
and Q
I05
.
T he
ou
lp
ut from bot h tcrm iuals is same, but only E02 is usctl.
25 CE Chip
enab
le Deviee selcction signal input t
ermin
al. High lcvcl
l.ow level ... Memory presc rv.uion ... No rma l op era no n
26 FM FM local ose illator
slgnal
input
Input terminal [or FM loeal oscill.uor is divided by I/l o or 1/17 by prcscalcr
Q7()1.
--- ---
27 AM AM loeal oscillaror
signa l
inp
ut
Termin
al for input of ihe A M local oscill.uor signal.
2R PSC Pulse swallow
com rol ou tpu t Thi s t
ermin
al
outpu
ts a signal tluu swirchcs the presc.iler division r.uio of
Q70 1 to 1/10 or 1/17 when rhc pu lse swallow meihod is used [or division.
(FM only)
29 GNO
Grou
nd
---
-
30 S
HIFT
Preset rcve rsc
indieation ou tpur Te rminal for ind iennon ou tp ul whei her
MI - M8: Low lcvcl M9 - M 10: High MI - MS or M9 - MI Il the prese t key.
level
31
32
LW
MW
Band switching
signal ourputs
Terminal
s for signal outpul switehing of cach band. High level is outpul frorn
terminal of FM (pi n 11
0.
33) .md low lcve l is out put lro rn orher t erminals
(pin no. 31 & 32) duriug r M rece prion
33
34
35
30
37
r-M
A
B
C
0
Preset srarion
indica rion OUlpU
IS
Te
rmi nals for
MI M2
A I ()
n () I
C () ()
0 () ()
..
--
ßCO
code outpur of pre sct stutio n indic.
uor.
M3 M4 M5 MIl M7 MS
I () I 0 I ()
I () 0 I I 0
() I I I I ()
() () () () () I
3R INT Not
uscd.
39
MEMO
RY Mernory down
inpu t
Terminal
for down signal input of preset
Acrive low. mc m
ory.
-
,.j()
4 \
42
ME M
OR
Y
UP
AUTO
I
MANUAL
MUTE
Memory up
inpu
t
Au
to/Ma
nual
indi
cation
outp
ur
Muring outpu l
-
T
ermin
al for up signa l inpu t of pre sct memory.
Aciive low.
Te
rminal Ior irulication
output
whether or auto i he tuni ng mod e.
This t
erm
inal becom es high dm ing ,1
11
10 morle and low (hlring mununl mode,
Output t
ermin
al which
mute
s rhe shock noisc oeeurring whcn rhe PLL is
released; nctivc high. T in: muti ug signal is outpur as shown below.
UP/OOWN
of manu ul/auto moc le , presel Illelllory is reealled , b.uid swirching
ancl
preset
scan.
