Sherwood DD-6200 - Manual (Page 9)

Before Operation
9
NOTES ON CASSETTE TAPE
Before loading a cassette tape, take up the slack in
the tape to prevent it from becoming entangled
around the capstan.
CLEANING THE HEAD SECTION
For the best condition of the deck, always keep the
head (recording/playback/erase), capstan and pinch
roller clean.
To clean them as follows;
1. Open the cassette door.
2. Clean the heads with the cotton swab dipped in
commercially available head cleaner.
3. Clean the capstan and pinch roller with another
cotton swab dipped in commercially available rubber
cleaner.
DEMAGNETIZING THE HEAD
When the recording/playback head is magnetized, the
sound quality will be deteriorated.
In this case, demagnetize the head using a
commercially available demagnetizer.
PRINCIPLE OF DOLBY B NR SYSTEM
The Dolby NR system functions so that it automatically
increases recording levels of medium and high
frequencies when the recording signal level is lower
than the specified level(encoding), and automatically
reduces the output level to the normal level during
playback(decoding). In this way, the tape hissing noise
is remarkably reduced without affecting the sound
quality. The Dolby B NR system used in your Cassette
Deck improves S/N ratio by about 5 dB at 1 kHz and
about 10 dB at 10 kHz.
Manufactured under license from Dolby
Laboratories. “Dolby” and the double-D symbol are
trademarks of Dolby Laboratories.
AUTO TAPE SELECTOR
The type of tape loaded is detected automatically by the
auto tape selector and recording bias and equalization
are set automatically according to the characteristic of
that tape such as NORMAL or CrO
2
tape.
Note : Do not use the metal tapes because these tapes
are not played back and recorded correctly.
After the recording has been finished, remove the
tab to prevent the recorded contents from being
erased or recorded on accidently.
To rerecord after tabs have been removed, cover
with adhesive tape.
Do not store the tapes in direct sunlight or near
equipment that generates heat. Keep the tapes away
from any magnetic fields.
Do not touch the tape surface and store the tapes in
their cases after use. Dust can cause contamination
of the heads resulting in noise.