Denon DN-720R - Manual (Page 12)

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 compartment.
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 swab 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.
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• Cleaning the Pinchroller and the Capstan
If the pinchroller or the capstan accumulate dust, tape transport may become
unstable resulting from slippage during recording or playback. The tape can also be
damaged by being rolled up around the capstan. Clean them with a cotton swab or
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 neat 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.