Silicon Graphics CHALLENGE L, User Manual, Page: 120 / 164

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Appendix B: Maintaining Drives
If neither of these two steps ejects the jammed cassette, contact your service
provider.
CD-ROM Care and Maintenance
CD-ROM drives are most vulnerable to damage when they are unpacked
and not yet mounted in a computer system. When handling a drive after
unpacking, there are two major types of damage to be aware of:
• rough handling (impact damage)
• electrostatic discharge (ESD)
Dropping an unpacked drive onto a hard surface can cause damage. A sharp
jolt can cause the laser to track improperly.
Avoid touching the drive’s printed circuit board (PCB). Leave the unit in
ESD protective wrap as long as possible. Use a static-conductive mat and/or
antistatic grounding devices when inspecting or handling the drive.
Additional handling tips are given below:
1. Keep the drive in the packing box or antistatic bag until the installation.
2. Handle the drive by its frame; avoid touching the drive’s PCB.
3. Install drives in a clean work area.
To remove dust or other particles from a CD, use a blast of air. You may also
clean the CD in running water and then blot it dry with a soft, lintless cloth
(do
not use a paper towel). Wipe the cloth directly outward from the center
of the disc. Do not rub in a circular motion as you would with a standard
phonograph record.
Note:
Never use solvents or other common cleaners, and do not use your
mouth to blow dust or other particles off the disc.
Individual discs should be handled by the edges only (see Figure B-1).
Touching or scratching the bottom of the disc can mar the finish and degrade
the optical readability of the media. Do not write, label, or mark on any
surface of the compact disc. An auto-eject occurs when a very dirty or badly
scratched disc is inserted. A disc placed in the operating case (also known as
the caddy) label side down also causes an auto-eject.