Denon DRM-800A Service Manual page 10

MAINTENANCE _
• Removing the cassette compartment cover
It will be more convenient if the cassette compartment
cover is removed during the cleaning of the pinchroller
and heads, or during demagnetizing of heads.
Follow these procedures:
1. Press the EJECT button to open the cassette com-
partment_
2. Hold only the cover of the cassette compartment and
pull it up. The compartment cover is removed from
the front.
When attaching the cassette compartment cover, reverse
the above procedure.
• Head Cleaning
After long usage, tape coating or dust may adhere to
the heads causing deterioration of sound. Clean them
regularly. Use a cotton swab moistened with cleaning
solution (such as alcohol).
Note:
1. Some cleaning cassettes on the market have a strong
abrasive effect and scratch the heads. Use cotton
swabs instead of cleaning cassettes.
2 .. Since the use of metal tapes is apt to collect more
dust on the heads, clean the heads more often to
enjoy optimum sound.
• Clean ing the pinchroller and the capstan
If the pinchroller or the capstan accumulate dust, tape
transport may become unstable resulting from sl ippage
during recording or playback. The tape can also be da-
maged by being rolled up around the capstan.
Clean them with a cotton swab or a soft cloth moistened
with cleaning solution (such as alcohol).
• Demagnetizing the heads
The heads may become magnetized after long usage or
by having a strongly magnetized object brought near them.
The result is a generation of noise, loss of the high
frequency range, or erasing the treble components of
pre-recorded tapes and adding noise.
Demagnetize the heads on a regular basis.
• Procedure
1. Be sure to turn "off" the power supply.
2. Turn the' demagnetizer "on" while it is more than
30cm away from the heads. Bring the demagnetizer
near the heads and slowly move it in a small circle
four or five times.
3. Slowly move the demagnetizer away from the heads
and turn "off" the power of the demagnetizer when
it is about 30cm away from the heads.
CASSETTE TAPE _
I
• Handling Precautions
• C120 cassettes
C120 cassettes are not recommended as they use a very
thin tape base which may become tangled around the
capstan or pinchroller.
• Tape slack
This cassette deck incorporates an automatic tape slack-
ness preventive mechanism, but it can not prevent such
a slackness as shown below. Remove it with a pencil or
the like prior to use.
10
• Storage Precautions
• Do not store cassette tapes in a place where they will
be subject to:
• Extremely high temperature or excessive moisture
• Excessive dust • Direct sunlight
• Magnetic fields (near TV set or speakers)
• To eliminate tape slack, store your cassettes in cassette
cases with hub stops.
• Accidental Erasure Prevention
• Every cassette has erasure prevention tabs for each side.
To protect your valuable recorded tapes from accidental
or inadvertent erasure, remove the tab for the appropriate
side with a screwdriver or other tools .
• To record on a tape with the erasure prevention tabs
removed, cover the tab holes with plastic tape.
Erasure prevention
tab for side A
Erasure prevention
tab for side B