Maintenance; Handling Compact Discs; Cleaning Discs - NAD S500 Owner's Manual

7. DISPLAY
The display provides information about playback status and about
the laser pickup's location on the disc. The displayed track/time
information is obtained by reading inaudible "sub-codes" in the disc.
TRACK NUMBER Each disc is segmented into numbered tracks
when the record is made; typically each numbered track will
correspond to a different song, symphonic movement, etc. These
track numbers are identified on the CD package and are encoded in
the disc by its manufacturer.
The letter "T" is displayed adjacent to the track number in the
display. For example, Track 15 is shown "T15" in the display.
In some CDs, at the manufacturer's option, tracks may be sub-
divided into sections identified by Index numbers. This player does
not display Index numbers.
TIME Normally this display shows in minutes and seconds the time
elapsed in the music since the beginning of the current track.
When you load a different disc and use the STOP/OPEN button to
close the disc drawer, the display shows the number of tracks and
the total playing time of all the tracks on the disc.
REMOTE RECEIVER An infrared sensor, located behind the display
window, receives commands from the remote control. There must be
a clear line-of-sight path from the remote control to this window. If
this path is obstructed, the remote control may not work.
REMOTE CONTROL
An infrared remote control is provided with your S500, enabling you
to operate playback functions from the comfort of your chair or from
virtually anywhere in the room.
For reliable operation there should be a clear line-of-sight path from
the remote control to the front of the CD player. If the player does
not respond to remote commands, it may be that this line-of-sight
path is obstructed by clothing, paper or furnishings.
NUMERIC KEYPAD Most of the buttons on the remote control
handset have the same effect as the corresponding buttons on the
GB
front panel of the disc player. In addition, the handset is equipped
with a direct-entry numeric keypad, which causes the player to jump
directly to the beginning of a numbered track and commence play.
Thus to play Track 5, simply press 5. To play Track 15, press 1 first,
then quickly press 5. To play Track 23, press 2 and 3.
TIME/DISPLAY
The TIME/DISPLAY button cycles the time display through three
modes as follows:
TIME The elapsed time since the beginning of the current track, in
minutes and seconds. (This is the "default" setting, selected
automatically when the player is turned on.)
TOTAL TIME Total elapsed time since the beginning of the disc.
REMAIN (track number shows a blank) The total playing time that
remains until the end of the disc.
Note that the TIME/DISPLAY function is available from the remote
control only.
6
INSTALLING AND REPLACING BATTERIES
The remote control requires two 1.5-volt AAA-size (i.e. UM-4 or IEC
RO3) cells. Alkaline cells are recommended to obtain maximum
operating life.
To open the battery compartment, press down in the ribbed area on
the back of the remote control unit. The cover of the battery
compartment will slide down and off. Install fresh cells, orienting
them as shown on the diagram within the compartment. The coil
springs should contact the (-) end of each cell. Slide the battery
compartment cover back on until it latches.
In some cases, poor operation may be caused by corrosion or
fingerprint oil on the battery contacts. Remove both cells, rub the
metal contacts at both ends of each cell with a clean cloth or a pencil
eraser, and re-install the cells, being careful to orient them correctly.

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
prevent the player from tracking the disc. (Incidentally, although the
tracking laser "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. 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 flawed discs that are
unplayable on some other players. Nevertheless, the discs should not
be abused or handled carelessly.

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 center 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.