Marantz ST-55 - Page 9

CARE
AND
MAINTENANCE
This
section
describes
the
care
and
maintenance
tasks
that
must
be
performed
to
optimize
the
operation
of
your
Marantz
equipment.
CLEANING
OF
EQUIPMENT
EXTERNAL
SURFACES
The
exterior
finish
of
your
ST-55/ST-65
will
last
indefinitely
with
proper
care
and
cleaning.
Never
use
scouring
pads,
steel
wool,
scouring
powders
or
harsh
chemical
agents
(e.g.,
lye
solution),
alcohol,
thinners,
benzine,
insecticide
or
other
volatile
substances
as
these
will
mar
the
finish
of
the
equipment.
Likewise,
never
use
cloths
containing
chemical
substances.
If
the
equipment
gets
dirty.
wipe
the
external
surfaces
with
a
soft,
lint-free
cloth.
lf
the
equipment
becomes
heavily
soiled:
—
dilute
some
washing
up
liquid
in
water,
in
a
ratio
of
one
part
detergent
to
six
parts
water
—
dip
a
soft,
lint
free
in
the
solution
and
wring
the
cloth
out
until
it
is
damp.
—
wipe
the
equipment
with
the
damp
cioth.
—
dry
the
equipment
by
wiping
it
with
a
dry
cioth.
REPAIRS
Only
the
most
competent
and
qualified
service
technicians
should
be
allowed
to
service
the
equipment.
The
Marantz
company
and
its
factory-trained
warranty
station
personnel
have
the
knowledge
and
special
facilities
needed
for
repair
and
calibration
of
this
precision
equipment.
After
the
warranty
period
has
expired,
repairs
will
be
performed
for
a
charge
if
the
equipment
can
be
returned
to
normal
operation.
In
the
event
of
difficulty,
refer
to
your
dealer
or
write
directly
to
the
nearest
location
to
you
that
is
listed
on
the
Marantz
Authorised
Service
Station
list.
If
writing,
please
include
the
model!
and
serial
number
of
the
equipment
together
with
a
full
description
of
what
you
think
is
abnormal
about
the
equipment's
behaviour.
TROUBLESHOOTING
In the case of problems or abnormal operation of the unit,
check the following before calling for service. What might
seem to be a serious malfunction is often due to a simple
operating mistake. If the problem persists after checking the
following, please contact your dealer or your nearest Marantz
distributor.
The tuner does not work and the indicators do not light up.
1. Check that the mains lead is plugged in properly to the
power outlet.
The indicators light up but the broadcast cannot be heard.
1. Check that the switches and volume control of the
connected amplifier are set properly.
2. Check the leads between the tuner and amplifier.
3. Press the MUTING button to set the muting-off mode. If
a faint sound becomes audible or noise becomes
noticeable, examine the condition of the antenna.
The FM broadcast sound is dishubed scratching noise.
1. Change the antenna direction.
2. \f an external antenna is used, change the direction of that
antenna.
3. If the signal strength in your area is weak, examine the
condition of the antenna.
AM broadcast reception is poor.
1. Change the direction of the AM loop antenna.
2. Change the orientation of the tuner.
3. Check whether noise is produced by other audio/video
components, electrical appliances or fluorescent lamps in
your room.
4. Try using an external antenna.
Stations can be received by manual tuning, but not by
auto tuning.
1. Change the direction of the AM loop antenna or external
antenna.
2. To improve the FM reception, try using a multi-element
antenna.
3. To improve the AM reception, try using an external antenna.