NEC VERSA S5500 Series User Manual page 67

Do not use stickers, labels or write on both sides of a disc. Unless you use specific label kits, never
use a tape or sticky material to label optical discs. Since the data layer of a disk is right beneath
the printed label, writing with a pen can scratch the thin reflective aluminium coating. Use soft-tip
pens especially for re-writable disks that are even more sensitive.
Do not scratch or polish the label side. The pits and lands (microscopic holes and flat areas) that
encode the information in the CD are on the label side, and not on the surface read by the lens.
Large scratches on the underside, however, can often be repaired using special polishing kits.
Most of the time, the laser, which focuses on a layer within the clear base, is able to see past small
scratches, in much the same way the human eye can focus on objects outside when looking
through a window.
Keep the disc away from direct sunlight, high temperatures, and humidity.
Keep optical discs away from high temperatures. Don't subject disks at temperature levels
exceeding 37° C. Exposure to direct sunlight over long p eriods easily warps a disk. Low
temperatures are not a hazard, but wait for a stable temperature before loading a disk. Disks
burned using CD-writer drives are more sensitive and should be stored at room temperature
whenever possible.
Moisture does not affect other types of discs, but avoid exposing re-writable disks to liquids. In case
of accidental spills on discs, rinse it off with lukewarm water and wipe dry with a soft cloth. Be
careful with sticky or oily substances that trap dirt and dust.
Proper cleaning is important to achieve optimal performance. Using a soft, slightly damp cloth, wipe
the disc from inside the disk and rub outwards. Do not wipe in circles but clean in the same outward
direction. Wiping the label side in circles can scratch a section of the data track. Slightly dipping the
cloth in warm water is enough. Using cleaners and solvents can do damage.
:
Caution Since discs are coated with thin layers of aluminium and plastic, avoid using benzene, paint
thinner, record cleaner, static repellent, or any other chemical to clean the disc. Chemicals and cleaners can
damage the disc.
Optical Disc Drive Care
To get the most from your optical disc drive, keep the following guidelines in mind.
Never forcibly pry open a drive whenever a disc gets stuck. The plastic tray is a relatively fragile and
vulnerable mechanism. Loading a CD off-centre is a common mistake that can jam the tray. If this
happens use the eject button, or the emergency eject hole. If that fails, ask for professional help.
Avoid excessive dirt and dust build-up on optical discs. Optical discs can tolerate accumulated dirt and
dust much better than floppy disks since CDs are not read by direct contact with the read lens.
Excessive dirt, however, will eventually affect the drive's performance. Thoroughly clean the discs
whenever necessary.
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