Conditions Frequently Mistaken To Troubles - Pioneer SX-1000TD Operating Instructions Manual

CONDITIONS FREQUENTLY MISTAKEN
TO
TROUBLES
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Noise: There are
a
variety
of
noises relating to
the
operation
of a
hi
f
i
unit.
These are generally
divided
into two
types;
0)
the
unit is
sick (a transistor
or part is
deieriorated)
and 12)
an
external source
of
noise
is
giving
noise
to
the
unit.
When
a hi-fi unit
produces
an unpleasant noise,
it
is
frequentiy
judged
that the
unit
is
sick, but
a
statistical record
indicates
that the
majority
of
noises produced
in a hi,fi
acoustic unit
is
resulted
from
external sources
of
noise.
Due
to
the
inherent
Symptoms
Suspecteo Source
of
Noise
Continuous
or
intermitteni
noise like
jjjjjj
or
zzzzzz.
When
a
station
ts
in,
hum
is
mixed
program.
Hissing sound noise in
AM
high
sensitivity and also the high fidelity in
reproduction, the
unit
amplifies and
reproduces the high
extraneous noises.
how.
ever
small.
1f your
receiver
produces
a
nojse,
check the follow.
ing
table and
trace
out
the
source
of
noise for
an
appropriate
corrective
action
The table
includes the
conditions
that
may be mistaken to
the
troubles
of
the
unit.
Diagonosis and
Corrective
Action
In rany
ca>es.
,' i,
uu
y A'toLl, ,o *a
tna
source
of
noise.
ln
order to
increase
the
radio
input
larger
than the nose
level,
set up
a
good
outdoor
antenna
and
make
a
complete grounding.
OStatics or
listening.
OFlourescent
lamp, motor,
or
thermostat
may be
used
in
house
or in
the
v
cinity
aThe
trequency
of
an
ad.lacent
statron
is
interfering that of
the station
being tuned
in (10 Hz beat
interference).
3TV set is on
in
the
sarne
house with
receiver.
OPoor connection of
shieided wire
(a).
OJack connection is
loose.
(b)
OLine cord or
fluorescent lamp is
near the
shielded wire. (c)
OPoor grounding.
(d)
OHAM transmitting station or TV
transmitt.
ing
station
is
near
your
house.
(e)
OStylus is
worn out.
(a)
ORecord is
worn out. (b)
ODust is
adhered
to
stylus. (c)
Olmproper mounting of
stylus. (d)
OStylus
pressure is not
proper. (e)
OThe
TREBLE sound
level
is too
high
Revers
ng
the
noise problem
the
noise.
line plug
may
occas
onally
alleviate this
Usually
it
is
very
difficuit to
elrminate
(medium
wave) reception
Static
noise
in FM
reception
(in
particuiar, when automo
biles
run
close
to
the
hou se).
Reception
of
FNI
program
contains
noise than
FM
program.
Hum or buzz.
When
switched
to
radio
reception,
the
noise will
disappear.
Sym
ptoms
Power is not
turned
on
al-
though the
power
switch
is
set
to
0N.
aWhite
noises
generated
from
automobile
en gr
n
es.
ORadio frequency sewing machine
or
weld
ing
machine being used near your
house.
stereo
I
oNote that
the
service area covered
by
an
more
FM
stereo broadcast
is
about
50
%
of
mono
that of a
regular rnono
broadcast
Not
possible
to
rernove such
interference.
lf
the
cause
of
such noise
is in
the
TV set,
increase
the
drstance
between
the
TV
ser
and
recerver.
In an
area surrounded by hills
or
high
buildings,
the
FM input
signals
are
very
weak. Thus
the
noise
limiter
in the circuit
looses
its function
Set up an outdoor
FIV
antenna having many reflector
elements.
Increasing
FM
input
Use
an
exclusive
FNI
indoor
T
antenna.
srgnal may
allevrate this
outdoor antenna
instead
problem.
of
the
!
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c
.;
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Correct
the
condrtions stated
rn
(a),
(b), (c), or
(d)
In
case
of
(e), report it to
an
otfjcial
activity.
Check into (a)
through
(e)
and correct
the
condition
Lower
the
TREBLE
level.
Lower
the
TREBLE
level
oFurther, watch
the
following conditions:
These are also
mistaken
to
troubles.
record,
in
volume
will
ODistance
between
the
record player
and
the
speaker
is too
smali.
aThe
place on
which
the
record player
or
speakers can
not
stably
rest.
Change
the
distance
or
rearrange the installationoositions
of
the unit
and
speakers.
(lnstalling
the
record player
on
a
f
irm,
solid stand may
allevrate
this
problem.)
Output
sound
is poor
and
mixed
with
noise.
H
ighs are not
clear.
l
Susoecleo
Prare
Dbg"*r.
o-O
Co*ti*
n.t
on
Ofuse is
blown
o+1.
(a)
Check ra)
tn,oJgh (b) ano correct
tne
co'ldtrton
OLrne
plug
is
loose.
(b)
d il|il,5ultu
5Ldlu rndy ailevlate rnts proDlem.l
]
Do
not
enhance.
the
BASS sound
level
excess
vely.
I