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Kenwood KT-7500 Instruction Manual page 9

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t
POINTS
TO
BE
CHECKED PRIOR TO SERVICING
ln
initially
¡nstalling
this tuner, improper
connections may
result
in one of the following ind¡cations. Their
possible
causes
and
corrective
measures
are listed
below
to
facilitate
installation.
lf
you
cannot
find
or correct
it,
see
your
audío
dealer.
SYMPTOM
PROBABLE
CAUSE
CORRECTION
Continuous
low
frequency
buzz.
Most
noticeable
at
night on weak
signal
stations.
Poor
AM
reception.
ln
ferroconcrete
build¡ngs
or in
areas
remote
from
the broadcasting station.
lnterference
from
electrical
appliances
or
atmospherics.
Erecting
a
1O
meter
outdoor
antenna and
securing
good ground conditions
should
reduce interference considèrably.
Complete
elimination
is
diff icult.
An outdoor
antenna
necessary.
Continuous
high
frequency whine which
increases
at night.
10 kHz
beat
¡nterference
from
adjacent
AM
station.
TV
interference.
Turn
TV
off.
(Neighboring
TV
set
may
also be
the
cause).
lmpossible
to
el¡minate
from
tuner
side.
Use
HIGH
Filter
to
cut
off
high
fre-
quency interference, amplif ier
side.
lnterm¡ttent
buzzing
or
sharp
cracking
noise,
Lightning
interference.
Interference
from
fluorescent
lamps.
AC plug
Connection.
Usually unavoidable
in
certain
areâs.
Occurs
when
lamps are
on
and
cannot
be
helped.
Try
reversing
AC
plug
connections.
Occurs
only
on
certain
stations due
to
high
voltage
power line and
cannot
be
helped
in
many
areas.
Continuous
hiss
or
buzzing
interference
with
broadcast.
Becomes
louder
during
stereo,
lncoming signal
too
weak
at
ANT
terminal
Erect
outdoor FM
antenna
if
only
indoor
T-type
is
used.
A
5 or
7 element antenna
is
necessary
if
you
are
located
at
a
considerable
dis-
tance
from the
broadcasting
station.
Occasional sharp
buzzing
or
crackling
noise.
FM
Automatic
Circuit
fails
to
respond
to
stereo broadcast.
Automobile
ignition noise.
More notice-
able
on
weak
signals.
lncoming signal is
exceptionally
wéak.
Erect
outdoor FM
antenna
as
far
away
from
roads
as
pract¡cable.
Erect an FM
outdoor
antenna.
KT-7500(K) g

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