NAD C 542 - Manual (Page 8)

, HDCD ® , High Definition Compatible Digital ® and
Microsoft™ are either registered trademarks or
trademarks of
Microsoft Corporation in the United States and/or
other countries.
HDCD system manufactured under license from Microsoft
Corporation. This product is covered by one or more of the
following patents: In the USA: 5,479,168, 5,638,074, 5,640,161,
5,808,574, 5,838,274, 5,854,600, 5,864,311, 5,872,531, and in
Australia: 669114. Other patents pending.
ABOUT THE OPTICAL PICKUP
The Compact Disc player uses a solid-state semi-conductor diode
laser, mounted on a tracking servo-mechanism, to play the disc.
The laser illuminates the track of microscopic pits representing
the digital data bits, while photo-diodes detect the reflected
illumination from the disc and convert it into an electronic signal
which is then decoded to recover the musical waveform in each
stereo channel.
You cannot see the laser operating, because it operates at
wavelength of 7800 Angstroms, which is in the infrared and thus
invisible to the human eye.
The Compact Disc player is completely safe for children to use.
The laser operates at very low power and is concealed within the
player mechanism. Even when the player is disassembled, the
laser remains sealed within an optical system that causes its light
to focus only 1 millimeter from the lens and then diverge rapidly,
reducing its intensity to negligible levels.
GB
8
TROUBLESHOOTING
NO POWER WHEN THE POWER BUTTON
IS SET TO ON • Poor or no power plug connection at
• Trigger switch is set to Auto
the AC outlet
• Insert the power plug firmly into the AC
outlet.
SYMPTOM POSSIBLE CAUSE SOLUTION
DISC PLAY DOES NOT START • The disc is loaded upside down
• The disc is too dirty • Reload the disc with the label side UP
• Clean the disc
NO SOUND • Incorrect audio cable connections
• Incorrect amplifier/receiver operation
• Connect the CD player to the
amplifier/receiver correctly
• Make sure that the input selector on
your amplifier or receiver is set to CD
SOUND SKIPS • The CD player is subject to vibration or
physical shock from external sources
• Change the installation location
REMOTE CONTROL DOES NOT WORK • Batteries in Remote Control handset
have expired
• Object obscuring remote sensor
on the player
• Replace batteries
• Remove any objects directly in front of
the player
A “HUMMING” SOUND CAN BE HEARD • Loose cable connections • Check the cable connections,
particularly the phono connecting
cables
flawed discs that are unplayable on some other players.
Nevertheless, the discs should not be abused or handled
carelessly. For best results, grasp the disc only by its edges.
CLEANING DISCS
Soiled discs may be cleaned by wiping with a soft cloth, either dry
or moistened, with water. Do NOT use conventional LP record-
cleaning products (cleaning solutions, sprays, treated cloths, or
anti-static preparations), nor any kind of chemical solvent
(alcohol, benzene, et al). A severely soiled disc may be washed in
a warm-water spray, possibly with a small amount of a mild kitchen
detergent added, and then wiped dry with a clean, soft towel.
When cleaning the disc, use only RADIAL strokes (from centre to
edge). Never use a circular wiping motion like that used for
cleaning ordinary LP records, because in wiping the disc there is a
risk of scratching it. A radial scratch will do the least harm because
it affects only a small portion of each circular data track, which can
be fully compensated by the player’ s error-correction circuits. But
a circular scratch that follows a data track may damage such a long
continuous segment of data that it cannot be corrected.
MAINTENANCE
At periodic intervals, open the disc drawer and wipe with a damp
cloth to remove any loose dust.
HANDLING COMPACT DISCS
Handle Compact Discs with care. The playback of a disc will not
be impaired by small dust particles, a few light fingerprints, or
slight scratches. But large scratches, or a thick layer of oily
fingerprints, can pre-vent the player from tracking the disc.
(Incidentally, although the tracking optical pickup “plays” the
disc through its clear side, the actual data surface is embedded
directly beneath the label, protected only by a very thin coating of
lacquer. So a scratch that cuts through the label may damage the
disc more than a similar scratch on the transparent “playing”
surface. Thus you should treat both surfaces of the disc with
care.) Severe scratches or fingerprints may cause the player to
mis-track (skipping ahead, or repeating the same passage). Less
severe damage may produce very brief bursts of high-frequency
noise. The tracking and error-correction circuits of this NAD CD
player are unusually sophisticated, providing secure tracking of
general, the quality of a CD-R, CD-RW are better when produced at a
lower speed against a higher speed on the same recorder or re/writer.
Switch the trigger switch to off position •