Sony PCG-R505ELP VAIO (primary manual), User Manual

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Notes on CD and DVD discs

Do not drop or bend the disc.

Do not touch the surface of the disc. Fingerprints and dust on the surface of a disc may cause reading errors.

For normal cleaning, hold the disc by its edge and use a soft cloth to wipe the surface from the center out.
 If the disc is badly soiled, moisten a soft cloth with water, wring it out well, and use it to wipe the surface of the disc
from the center out. Wipe off any remaining moisture with a dry, soft cloth.

Do not use solvents such as benzine, thinner, commercially available cleaners or anti-static spray, as they may
damage to the disc.
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