Pioneer SX-424 KUW Manual de instrucciones - Página 10
Navegue en línea o descargue pdf Manual de instrucciones para Receptor Pioneer SX-424 KUW. Pioneer SX-424 KUW 12 páginas. Am/fm stereo receiver
CONDITIONS FREOUENTLY MISTAKEN
FOR
MALFUNCTION
Noise:
There are
a
variety of
noises
relating to the
operation
of a
hi-fi unit.
These
ale
generally
divided
into two
types; (1) the
unit
is faulty
(a
transistor
or
part
has deteriorated) and
(2)
an
external
source is
adding
to the unit.
When
a
hi-fi unit
produces an unpleasant noise,
it
is
often
assumed
that the unit
is
faulty, but statistical
records indicate
that
the majority
of
noises
pro-
duced
in hi-fi
acoustic
units result from
external
sources
of noise:
Due
to the
inherent
high
sensitivity and
the high fidelity in
reproduction,
the unit
amplifies
and
reproduces
extraneous
noises,
however small,
into definite output
noise.
If
your
receiver produces a noise, check according
to
the following table and trace out the
source of
noise
for the appropriate corrective actioil.
SYMPTOM
SUSPECTED SOURCE
OF
NOISE
DIAGNOSIS
AND
REMEDY
F
o
O
o
o
t
c0
o
F
(,
z
=
U J
F
2
J
z
ul
I
=
Continuous or intermittent
noise
like
jjjjjj
or
zzzzzz.
Static
(lightning)
Fluorescent
lamp,
motor,
or
thermostat
may
be
ln
use
in
house
or
in the
vicinity
of
the
house.
ln
many
cases,
it
is
very
difficult
to
remove the
source
of
noise.
ln
order
to
make
the radio
input
larger
than
the
noise level, set
up
a good
outdoor
antenna
and
make
a
complete
grounding.
When a
station is
tuned in,
hum
is
mixed
in
the
pro-
gram.
Poor fluorescent lamp,
motor, or
electric
heater
may
be
in
use
in
house
or
near
the
house.
Reversing
the line plug may
occasionally alleviate this
noise
problem. Usually
it
is
very
difficult
to
eliminate
the
noise-
Hissing sound noise
in
AM
(medi
um
wave )
reception.
The
frequency
of
an
adjacent
station
is
interfering
with that
of
the
station
being
tuned
in
(10kHz beat interference).
TV
set
is
on
in
the
same house
with
the
re cei
ver.
lmpossible
to
remove such interference.
lf
the
cause o{
such noise
is
in the
TV
set. increase
the
distance
be'
tween
the
TV
set
and
receiver.
Static
noise
(in
particular,
when
automobiles
run
close
to the
house).
"
White noise
generated
from
automobile
engines.
. Radio frequency
sBwing machine
op
weld-
ing machine being
used near
your
house.
ln
an
area
surrounded
by
hills
or
high buildings,
the
FM
input
signals are very weak. Thus
the
noise
limiter
in
the
circuit
Ioses
its
function.
Set up
an
FM
outdoor
antenna having many
director
elements.
Reception
of
FM
stereo
program contains
more
noise
than FM mono
pro-
qram.
"
Note
that
the
service area
covered by
an
FM
stereo broadcast is
about
50%
of
that
of
a
regular mono broadcast.
lncreasing
FM
input
signal may alleviate
this
problem.
Use
an exclusive
FM outdoor
antenna instead
of
the
indoor
T-type
antenna.
o
o
t
o
o
uJ
cc
z
;
J
o-
z
ul
I
=
Hum or buzz.
When
switched
to
radio
recep-
tion,
the
noise
disappears.
Poor connection
of
shielded
wire
(a).
Jack
connection
is
loose. (b).
Line
cord
or
fluorescent lamp
is near
the
shielded
wire.
(c).
Poor
grounding.
(d).
Ham transmitting station
or TV
transmit-
ting station
is
near
your
house.
(e).
correct
the conditions
stated
in
(a),
{b),
{c)
or
{d).
In
case
of
(e).
report
it
to
an
official
activity.
Output tone
quality
is
poor
and mixed
with
noise
Treble
is
not
clear.
Stylus
wears
out.
(a)
Record
wears
out.
(b)
Dust
adheres
to stylus.
(c)
Stylus
is
improperly mounted.
(d)
Stylus
pressure
is
not
proper.
(e)
The TRE BLE level
is
too
high.
Check
(a)
through
{e)
and correct
the condition.
Lower the
TREBLE
level.
WATCH FOR
THE FOLLOWING
CONDITIONS;
THESE ARE ALSO APT TO
BE
MISTAKEN
FOR MALFUNCTIONS.
SYMPTOM
SUSPECTED SOURCE OF NOISE
DIAGNOSIS
AND
REMEDY
Power
is not
turned
on
although
the
power switch
is
set
to
ON.
Fuse
blows.
(a)
Line
plug
is
loose.
(b)
Check
(a)
and
(b) and correct the
condition.
ln
playing
a
record,
in-
creasing
the volume
causes
h
owlin
g.
Distance between
the
turntable and
the
speakers
is
too short.
The
place
on
which
the
turntable
or
speakers are set is unstable.
Change
the
distance
or
rearrange
the
installation
increase
of the unit
and
speakers.
(lnstalling
the
turntable
on
a
firm,
solid stand may
alleviate
this
pro
ble
m.
)
Do
not
enhance
the
BASS
sound
level excessively.
1l