Denon UDRA-90 - 13 IMPORTANT INFORMATION; Unit Maintenance Procedures; 14 SPECIFICATIONS; Technical Specifications Summary

fi3] IMPORTANT INFORMATION
eHead Cleaning
After the cassette deck has been used for a while, powder
from the tapes and dirt adhere to the head and lower the
sound quality.
Use a head cleaning cassette tape to clean.
NOTE:
Some of the cleaning sets on the market have a strong
polishing effect which can damage the head.
@ Disc Cleaning
Never use the following to clean discs:
e Solvents such as benzene or alcohol
@ Cleaners containing abrasives
e Record sprays or cleaners
e Anti-static products
@Head Demagnetizing
The heads become magnetized after the deck has been used
over a long period of time or if the heads are exposed to a
magnetic field. This results in noise and reduced treble. tn
addition, there may be a reduction of the treble range of
recorded tapes as well as noise produced on these tapes.
When the heads become magnetized, use one of the
cassette tape head demagnetizers (erasers) available on the
market to demagnetize the heads.
© For details, read the operating instructions of the demag-
netizer.
Dust, fingerprints, or spittle on the disc can cause noise or
skipping.
If the disc is dirty or if the player does not work properly,
clean the disc as follows:
e Hold the disc as shown in the diagram, with the signal
surface facing up (and the labelled side facing down).
e Using a soft cloth, wipe the disc gently from the inside
straight towards the edges (as shown by the arrows).
e Do not wipe from the edges towards the center, or
around the disc as you would wipe records.
@ Do not use hard cloths or rub the disc forcefully, since
the signal surface is susceptible to scratches.
SPECIFICATIONS
Receiver (UDRA-90)
e Tuner
Reception Frequency Range:
Receiving Sensitivity:
FM Stereo Separation:
e Amplifier
Rated Output Power:
Jacks:
Bass Adjustment:
Treble Adjustment:
Super Dynamic Bass:
Jacks:
Dimensions (max.}:
Weight:
Power Supply:
Power Consumption:
@CD Player (UCD-90)
Wow and Flutter:
Sampling Frequency:
Light Source:
Dimensions (max.):
Weight:
lm Cassette Deck (UDR-90)
Type:
Heads:
Tape Speed:
Noise Reduction Circuits:
Usable Tapes:
Dimensions (max.):
Weight:
@ Remote Control Unit (RC-170}
Type:
Number of Buttons:
Dimensions {max.}:
Weight:
(H) = height,
FM: 87.50 MHz to 108.00 MHz
AM: 522 kHz to 1611 kHz
FM: 1.5uV,75 ohms [SN ratio 30 dB)
AM: 20uV (SN ratio 20 dB)
40 dB (1 kHz)
30 W + 30 W {40 Hz to 20 kHz, 8 ohm}
3.5 mm headphone jack
100 Hz +8 dB
10 kHz +8 dB
80 Hz +8 dB
PHONO: Input jacks
AUX/DAT: Input jacks, recording output jacks
PROCESSOR: Processor input/output jacks
272 (W) x 97 ({H) x 313 (D) mm (10-45/64" x 3-13/16" x 12-21/64")
6.0 kg (13 Ibs 4 oz)
AC 230 V, 50Hz, AC 240 V, 50Hz (for U.K. model)
90 W
Below measurable limits (+0.001% W. Peak}
44.1 kHz
Semiconductor
272 (W) x 97 {H) x 313 (D) mm (10-45/64” x 3-13/16" x 12-21/64")
2.7 kg (5 Ibs 15 oz}
Horizontal 4-track, 2-channel auto reverse stereo cassette deck
1 hard permalloy recording/playback head
and 1 double-gap ferrite erase head
4.75 cm/s
Dolby B and C NR
Normal, chrome and metal tapes
272 (W) x 97 (H) x 305 (D} mm (10-45/64" x 3-13/16" x 12-1/64")
3.0 kg (6 Ibs 10 02)
Infrared pulse
40
65 (W) x 208 (H) x 16 (D) mm (2-9/16” x 8-3/16" x 5/9")
130 g (Approx. 6.4 02) (including batteries)
Maximum dimensions include controls, jacks, and covers.
(W) = width,
(D) = depth
e
For
improvement
purposes,
specifications
and
functions
are
subject
to
change
without
advanced
notice.
23