Marantz SD535 - Care and Maintenance; Troubleshooting

Demagnetize the heads.
After a long period of use, the metallic parts and heads which come
into contact with the tape will be magnetized and problems such as
an increase in noise or faded high frequencies may result. It is
recommended that the heads and other metallic parts which come
into contact with tapes be demagnetized after every 20 to 30 hours of
use using a cassette head demagnetizer in the from shape of a
cassette.
Note:
As noise is produced during demagnetization, reduce the amplifier
volume before starting.
AUTO TAPE SELECTOR
This unit is equipped with an auto tape selector which automatically
sets the bias and equalizer levels using the detection holes provided
in the cassette shell. The bias and equalizer levels are automatically
set according to the type of tape as follows. (See Figure 2.)
© Normal tapes: EQ; 1204s, Bias; Low
© CrO2 tapes: — EQ; 70us, Bias; High
¢ Metal tapes: EQ; 70us, Bias; Metal
In some metal tape cassettes, the metal detection holes are not
provided. With these cassettes, the CrO2 tape type indicator lights up
and the recorded sound may be distorted.
MAKING OPTIMUM CASSETTE
RECORDINGS
TYPE AND BRAND OF TAPES TO USE
In cassette recording, the type and brand of cassette you use has a
great influence on the quality of your recordings. Therefore, it is
worthwhile purchasing the highest-quality cassette available.
Chromium dioxide (CrOz) and metal tapes generally provide better
fidelity than normal, ferric oxide tape.
We recommend the use of cassettes with a recording capacity of 90
minutes or less. In production, the performance of our cassette decks
is tested using the following tapes.
Type of Tape
TDK AC224 (C-60) TDK AD
Special/CrO2 TDK ACS13 (C-60 TDK SA
)
Metal TDK AC712 (C-60) TDK MA
TDK MAR
TO PROTECT VALUABLE RECORDINGS
In the record mode, information previously recorded on the tape will
automatically be erased. To prevent this from happening, use a small
screwdriver to break out one or both safety tabs (see Figure 3 for
side A). It is possible to restore the recording capability of either side
of the cassette by covering the opening with plastic tape (see Figure
4 for side A).
NOTES ON INSTALLATION
When the deck is installed on or near other audio equipment hum
sometimes occurs. Position’ the equipment so that the hum ceases.
Always install the unit horizontally.
This model incorporates a high-performance microprocessor. In the
event of malfunction due to static electricity, etc., turn off the POWER,
and after 30 seconds turn it on again.
TROUBLESHOOTING
if you think a malfunction has occurred, first check the points listed
below, The problem is likely to have been caused by a simple
operational error or a connection problem. If the problem cannot be
corrected even after carrying out the following checks, consult your
dealer or nearest Marantz sales office or service counter.
© The tape is not moving.
1. Is the mains lead plugged in properly?
2. Is the POWER button ON?
3. Is the PAUSE If button set to the pause mode?
¢ The tape is moving but no sound is heard.
1. Is the cassette recorded?
2. Are the amplifier and speakers connected properly?
3.
Is
the
amplifier’s
volume
control
set
at
the
minimum
level?
¢ Recording is not possible.
1. Is there a cassette in the unit?
2.
Has
the
wrong
recording
protection
tab
of
the
cassette
broken?
3.
Is
the
recording
level
set
properly?
@ Sound is distorted.
1. Was the recording level too high?
. Are the heads clean?
Np
¢ Sound is irregular.
1. Is the tape head clean?
2. Are the pinch rollers (capstans?) clean?
3. Is the cassette tape defective?
4. Is the tape wound irregularly?
© Noise is heard.
4. Is the tape head clean?
2. Is the tape head demagnetized?
3. Is the cassette tape defective?
4
.
Is
the
DOLBY
NR
system
button
set
properly
according
to
the
tape
being
played?
:
e Hum interferes with the sound.
1. Are the connection leads connected properly?
2.
Is
there
any
source
of
magnetism
(TV,
motor,
transformer,
etc.)
present
near
the
unit?
3.
When
this unit
is
stacked
on
or
under
a
certain
type
of
amplifier,
hum
noise
may
be
picked
up.
It
so,
position
the
two
units
so
that
there
is
no
mutual
interference.
This
also
applies
if
the
unit
is
installed
near
a
TV
set.
4.
Unplug
the
mains
plug
from
the
mains
outlet
and
plug
in
the
other
way
around
to
reverse
the
polarity.
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
deck
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.
If 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 cloth.
— dry the equipment by wiping it with a dry cloth.
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
Authorized
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
behavior.
: