Sony ST-JX401 User manual
SONY
3-751-442-21
(1)
FM
Stereo/FM-AM
Tuner
ST-JX401
Operating
Instructions
Before
operating
the
unit,
please
read
this
manual
thoroughly,
and
retain
it
for
future
reference.
Owner’s
Record
The
model
and
serial
numbers
are
located
at
the
rear.
Record
the
serial
number
in
the
space
provided
below.
Refer
to
these
numbers
whenever
you
call
upon
your
Sony
dealer
regarding
this
product.
Model
No.
ST-JX401
Serial
No__
WARNING
To
prevent
fire
or
shock
hazard,
do
not
expose
the
unit
to
rain
or
moisture.
CAUTION
B'SK
OF
ELECTRIC
SHOCK
DO
NO
T
OPEN
CAUTION
TO
REDUCE
THE
RISK
OF
ELECTRIC
SHOCK
DO
HOT
REMOVE
COVER
tOR
BACK)
NO
USER-SERVICEABLE
PARTS
INSIDE
REFER
SERVICING
TO
QUALIFIED
SERVICE
PERSONNEL
a
This
symbol
is
intended
to
alert
the
user
to
/m\
the
presence
of
uninsulated
“dangerous
yt
\
voltage”
within
the
product’s
enclosure
/
I
\
that
may
be
of
sufficient
magnitude
to
/
v
\
constitute
a
risk
of
electric
shock
to
persons.
A
This
symbol
is
intended
to
alert
the
user
to
A
i
-
the
presence
of
important
operating
and
/
I
\
maintenance
(servicing)
instructions
in
/
■
\
theliteratureaccompanyingtheappliance.
Precautions
On
safety
•
Operate
the
unit
only
on
120
V
AC,
60
Hz.
•
Should
any
solid
object
or
liquid
fall
into
the
cabinet,
unplug
the
unit
and
have
it
checked
by
qualified
personnel
before
operating
it
any
futher.
•
Unplug
the
unit
from
the
wall
outlet
if
it
is
not
to
be
used
for
an
extended
period
of
time.
To
disconnect
the
cord,
pull
it
out
by
grasping
the
plug.
Never
pull
the
cord
itself.
On
Installation
•
Place
the
unit
on
a
level
surface.
•
Do
not
install
the
unit
near
heat
sources
such
as
radiators
or
air
ducts,
or
in
a
place
subject
to
direct
sunlight,
excessive
dust,
mechanical
vibration
or
shock.
•
Good
ventilation
is
essential
to
prevent
internal
heat
build-up
in
the
unit.
Place
the
unit
in
a
location
with
adequate
air
circulation.
Do
not
place
the
unit
on
a
soft
surface.
On
cleaning
Clean
the
cabinet
periodically
with
a
soft
dry
cloth.
If
the
stains
are
difficult
to
remove,
use
a
cloth
moistened
with
a
mild
detergent
solution.
Do
not
use
solvents
such
as
alcohol,
benzine
or
thinner,
since
they
wilt
damage
the
finish.
On
repacking
Do
not
throw
away
the
carton
and
packing
materials.
It
makes
an
ideal
container
in
which
to
transport
the
unit.
If
you
have
any
questions
or
problems
concerning
your
unit
that
is
not
covered
in
this
manual,
please
consult
your
nearest
Sony
dealer.
For
detailed
precautions,
see
the
leaflet
“IMPORTANT
SAFEGUARDS”.
PROPERTY
OF
THE
RATIONAL
TECHNICAL
CEPT.
f
|
L
t
L(Ji'
%
Do
not
remi
vj
©
1990
by
Sony
Corporation
Troubleshooting
Guide
Before
going
through
the
check
list
below,
first
refer
back
to
the
connection
and
operating
procedures.
Should
any
problem
persist
after
you
have
made
these
checks,
consult
your
nearest
Sony
dealer.
Trouble
Cause
Remedy
No
sound
Switches
of
the
amplifier
are
wrongly
set.
Set
them
correctly.
Unable
to
receive
stored
stations
Frequency
is
incorrectly
stored.
Store
the
correct
frequency.
STEREO
indicator
blinks
Antenna
direction
and
location
are
not
correct.
Check.
Different
frequency
is
used
from
that
of
the
broadcasting
station.
Set
to
the
correct
frequency.
Signal
is
too
weak.
Connect
an
external
antenna
for
FM.
Too
many
noises
Picking
up
noises
from
other
electrical
apparatus.
Move
the
tuner
and
antenna
lead-in
wire
away
from
the
noise
sources.
Antenna
direction
and
location
are
not
correct.
Check.
Antenna
wire
collects
unnecessary
radio
waves
or
noises.
Replace
it
with
a
coaxial
cable.
There
are
working
TVs,
transceivers
and
amateur
wireless
units
in
the
vicinity.
Do
not
use
noise-producing
apparatus
near
the
tuner.
One
antenna
is
used
for
more
than
two
tuners,
or
with
a
TV
set.
Use
a
distributer.
Unable
to
scan
stored
stations
TUNING
knob
is
not
operated.
First
press
the
MEMORY
SCAN
button
and
then
turn
the
TUNING
knob.
Specifications
4
4
FM
tuner
Frequency
range
87.5
—
108
MHz
Antenna
terminal
300
ohms,
balanced
75
ohms,
unbalanced
IF
10.7
MHz
Sensitivity
S/N
50
dB
sensitive
Mono
22.1
dBf
(7
mV)
Stereo
42.1
dBf
(70
mV)
Usable
sensitivity
(IHF)
19.5
dBf
(5
mV)
Signal-to-noise
ratio
80
dB
(mono),
75
dB
(stereo)
Harmonic
distortion
0.3%
(mono),
0.5%
(stereo)
at
1
kHz
Separation
40
dB
(1kHz)
Frequency
response
30
Hz
—
15
kHz
-20
dB
Selectivity
55
dB
(400
kHz)
AM
suppression
ratio
54
dB
Image
response
ratio
50
dB
IF
response
ratio
90
dB
Spurious
response
ratio
70
dB
Automatic
tuning
threshold
17.8
mV
(30
dBf)
Output
775
mV,
4.7
kohms
(at
75
kHz
deviation)
AM
tuner
Frequency
range
530
—
1,710
kHz
(10
kHz)
531
-
1,710
kHz
(9
kHz)
Antenna
Loop
antenna,
External
antenna
terminal
IF
450
kHz
Sensitivity
(999
kHz
or
1,000
kHz)
500
^V/m
(when
the
loop
antenna
is
in
use)
Signal-to-noise
ratio
54
dB
(mono,
normal)
Harmonic
distortion
0.5%
(mono,
normal)
Selectivity
35
dB
(9
kHz,
normal)
38
dB
(10
kHz,
normal)
Frequency
response
40
Hz
—
3.5
kHz
+«
dB
(normal)
General
Power
requirements
Power
consumption
Dimensions
Weight
120
V
AC,
60
Hz
8
W
Approx.
430
x
80
x
265
mm
(w/h/d)
(17x3y
4
x10%
inches)
Approx.
2.4
kg
(5
lb
5
02
)
Supplied
accessories
Remote
control
cord
(1)
Connecting
cord
(1)
FM
wire
antenna
(1)
AM
loop
antenna
(1)
i
Sony
Corporation
Printed
in
Japan
Design
and
specifications
subject
to
change
without
notice.
Connections
CONTROL
S
OUT
r
jmmm
OUTPUT
CONTROLS
IN
TUNER
IN
CONTROL
S
OUT
—Note
to
CATV
system
Installer-
This
reminder
is
provided
to
call
the
CATV
system
installer’s
attention
to
Article
820-22
of
the
NEC
that
provides
guidelines
for
proper
grounding
and,
in
par¬
ticular,
specifies
that
the
cable
ground
shall
be
connected
to
the
grounding
system
of
the
building,
as
close
to
the
point
of
cable
entry
as
practical.
Notes
on
Connections
•
Connect
the
AC
power
cord
last.
Make
sure
power
is
off.
•
Cord
plugs
and
jacks
are
color
coded.
Red
plugs
and
jacks
are
for
right
channel
(R)
and
white
ones
for
left
channel
(L).
•
The
cable
connectors
should
be
fully
Inserted
into
the
jacks.
A
loose
connection
may
cause
hum
and
noise.
•
Keep
speaker
cords,
connecting
cords
and
power
cords
away
from
the
AM
loop
antenna
and
the
tuner’s
antenna
lead-in
to
avoid
possible
noise
pickup.
•
AM
loop
antenna
(supplied)
If
necessary,
attach
the
antenna
to
a
wall.
For
better
AM
reception
#
CONTROL
S
connector
(4-pin,
supplied)
IN:
Connect
to
the
CONTROL
S
OUT
connector
of
the
Sony
TA-AX401
/TA-AV601
f\
A-AV501
amplifier
for
whole
audio
system
remote
control.
OUT:
Connect
to
the
CONTROL
S
IN
connector
of
other
Sony
equipment
with
the
4-pin
flat
remote
control
cord
for
whole
audio
system
remote
control.
Insulated
wire
Extend
a
6
to
15-meter
insulated
wire
out
of
doors.
(It
is
also
necessary
to
connect
the
supplied
AM
loop
antenna)
1
1
•
AC
OUTLET
Use
this
outlet
to
power
another
audio
component
whose
power
consumption
is
less
than
100
watts.
The
outlet
is
not
controlled
by
the
POWER
switch
of
the
tuner.
It
will
continually
supply
power
to
any
unit
connected.
#
Antenna
Ground
To
prevent
hum,
connect
the
ground
wire
to
ANTENNA
ground
terminal
(
rtr
).
When
an
outdoor
antenna
is
installed,
be
sure
to
connect
the
ground
wire
for
lightning
protection.
To
change
the
AM
tuning
interval
Note
The
AM
tuning
interval
is
preset
at
the
factory
to
10
kHz
When
the
interval
is
changed,
all
preset
stations
which
to
match
the
frequency
allocation
system
of
your
you
have
memorized
using
the
numeric
buttons
will
be
country.
To
change
the
interval
to
9
kHz,
proceed
as
erased
from
the
memory.
After
changing
the
interval,
be
follows.
sure
to
preset
the
stations
again.
1
Depress
the
POWER
switch
to
turn
on
the
unit.
2
Set
the
BAND
FM/AM
selector
to
AM.
3
Press
the
POWER
switch
to
turn
off
the
unit.
4
Hold
the
TUNING
knob
in
the
“
+
”
position,
and
depress
the
POWER
switch
to
turn
on
the
unit.
To
reset
the
interval
to
10
kHz,
follow
the
same
procedure.
Table of contents
Other Sony Tuner manuals
