Marantz SD4050 - Manuel (Page 12)

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This deck is equipped with the Dolby HX PRO headroom extension
system. Since the system functions automatically during recording, no
switching operation or adjustment is required. The system is effective
with any type of Normal, High and Metal tape.
The Dolby HX PRO headroom extension system functions during
recording to raise the saturation level in the high frequency range.
Therefore, most of the high frequency range distorted or lost during
recording on conventional cassette decks are more faithfully
recorded on the new MARANTZ cassette deck. Features of the Dolby HX PRO Headroom Extension System
(1) Performance of Normal and High Position tapes can be improved
to very close of that offered by Metal tape.
(2) The dynamics in the high frequency range are improved
significantly.
(3) Since no decoding is necessary during playback, the improved
sound can be enjoyed on any type of tape deck, including
portable players and car aud io systems.
(4) The system functions whether the Dolby B/C NR system is
engaged or not.
DOLBY HX PRO HEADROOM EXTENSION SYSTEM
MAINTENANCE
í Head cleaning
After long usage, tape coating material or dust may adhere to the
heads, causing deterioration of sound. Therefore, the parts
depicted in the illustration should be cleaned reguraly. Use a
cotton swab moistened with a tape head cleaning solution (such
as alcohol).
Note:
1. Some cleaning cassettes on the market have strong abrasive
effects and may scratch the heads. Always use cotton swabs
instead of cleaning cassettes.
2. Since the use of metal tape is apt to collect more dust on the
heads, the heads should be cleaned more often to enjoy the
best possible sound.
í Cleaning the Pinch Rollers and Capstans
If the pinch roller or capstans accumulate dust, tape transport may
become unstable, as a result from slippage, during recording or
playback. The tape can also be damaged if it gets entangled in
the capstan.
Clean these parts with a cotton swab or a soft cloth moistened with
a tape head cleaning solution (such as alcohol).
í Demagnetizing the Heads
The heads may become magnetized after long usage or if
storongly magnetized objects are brought near them. The result is
a generation of noise, loss of the high frequency range, and in
extreme cases erasure of the high frequency part on pre-recorded
tapes in combination with added noise.
Thus, the heads should be demagnetized at regular intervals.
(Head demagnetizers are sparately available from your dealer.)
í How to Demagnetize the Tape Heads
1. Turn off the power.
2. Turn on the demagnetizer while it is at least 30 cm away from
the heads. Bring the demagnetizer near the heads and slowly
move it in small circles four or five times in front of each head,
making sure you do not touch them.
3. Slowly move the demagnetizer away and turn it off when it is at
least 30 cm away from the heads.
4. For more details, please read the User Guide provided with the
demagnetizer (optional).
PLAY ( )
FF ( )
REW ( )
PAUSE ( )
STOP ( )
REC
REC MUTE
COUNTER RESET
DECK A
DECK B
DIRECTION ( )
RC-5 CODE
1853
1852
1850
1848
1854
1855
1842
1849
1844
1846
1847
í CAPABILITY OF REMOTE CONTROL