Marantz PROFESSIONAL PMD740 - Care and Maintenance; Cleaning of Equipment External Surfaces

CARE AND MAINTENANCE
This
section
describes
the
care
and
maintenance
tasks
that
must
be
performed
to
optimize
the
operation
of your
Marantz
PMD740.
MAINTENANCE
Head Cleaning
If the heads are not cleaned for a long period, dirt or dust may be deposited on the heads and capstans,
causing degraded high-frequency characteristics, volume. drop or degraded recording and erasure.
To prevent this, clean the heads, etc., periodically as follows.
1. Turn the power off.
2. Open the cassette holder.
3. Clean the parts which come in contact with tape, including the heads, capstans, tape guides, pinch
wheels, etc., with a cotton swab soaked in a commercially available head cleaning solution.
Head Demagnetization
When the deck has been used for a long period of time, the head may be magnetized and noise
may be generated. If the head is extremely magnetized, the high frequencies in recorded tapes could
even be erased.
To prevent this, demagnetize the heads and capstans periodically (every 20 hours of use) using a
- commercially-available head demagnetizer. (For the operation, please refer to the instruction manual
supplied with your head demagnetizer.)
Caution:
Be sure to turn the power of the cassette deck off before using a head demagnetizer.
CLEANING OF EQUIPMENT EXTERNAL SURFACES
The exterior finish of your unit 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 liquid soap in water, in a ratio of one part soap to six parts water
-—dip a soft, lint free cloth 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 technicians should be allowed to service your PMD740. Marantz
and its factory trained warranty station personnel have the knowledge and special equipment needed
for repair and calibration .of this precision instrument.
In the event of difficulty, call the toll-free telephone number listed on the face of the warranty to obtain
the name and address of the Marantz Authorized Service Center nearest you. In many cases, the dealer
where you purchased your Marantz unit may be equipped to provide service. Please include the model,
serial number of your unit together with a copy of your purchase receipt and a full description of what
you feel is abnormal in your PMD740’s performance.
13