Denon DRW-585 - Advanced Features and Maintenance; Dolby HX-PRO Headroom System; Routine Maintenance Guide

ENGLISH
DOLBY HX-PRO HEADROOM EXTENSION SYSTEM
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, Cr0 2 and Metal tape.
The Dolby HX-PRO headroom extension system functions during recording
to raise the saturation level in the treble range. Therefore, most of the
treble range components distorted or lost during recording on convention¬
al cassette decks are more faithfully recorded on the new DENON cassette
deck.
Features of the Dolby HX-PRO Headroom Extension System
(1 } Performance of Normal and CrO? tapes can be improved to very close
of that offered by Metal tape.
(2) The dynamics in the treble 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 audio systems.
(4) The system functions whether the Dolby B/C NR system is engaged
or not.
MAINTENANCE
■ Head Cleaning
After long usage, tape coating or dust may adhere to the heads, causing
deterioration of sound. Therefore, the parts depicted in the illustration
should be cleaned regularly. 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.
■ Cleaning the Pinch Rollers and Capstans
If the pinch rollers 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).
■ Demagnetizing the Heads
The heads will become magnetized after long usage or if strongly
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
treble components on pre-recorded tapes in combination with added
noise.
Thus, the heads should be demagnetized at regular intervals. (Head
demagnetizers are separately available from your dealer.)
■ 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.
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