Sega Genesis 2 - Manual (Page 28)

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Handling the GD-ROM Disc
Do not contaminate the discs with your
fingerprints or dust particles. Contaminated
discs may lower audio and video quality.
When cleaning the discs, do not use volatile
chemicals (benzine, thinner, etc.), cleaning
sprays, and antistatic agents.
Do not use cracked, warped, or damaged discs.
Do not attach papers or seals onto the discs; do
not scratch the discs.
Do not use the discs with a sign of peeled seals,
tapes, etc.
Observing these instructions, do not insert such a non-usable disc into
the GD-ROM drive. Otherwise the inserted disc can not be ejected.
When cleaning a heavily contaminated disc, use clean cloth that has
been soaked in water and squeezed. Then remove moisture with dry
cloth.
When holding a disc, be careful not to contaminate it with your
fingerprints.
How to Hold a Disc
With both hands:
Put your thumbs and forefingers of both
hands on the disc's 4 circumference tips. With one hand:
Insert your forefinger into a central
hole and at the same time put your
thumb and middle finger on the
disc's 2 circumference tips.
4. SOFT KIT
How to Handle the Key Chip
The key chip is a precision device. Handle it carefully because it may be
damaged by heat, shock, and static electricity.
Use the key chip with the GD-ROM disc of the corresponding game that
has been shipped together with the key chip.
STOP
IMPORTANT
Use clean cloth to wipe
the disc gently and into a
radial
direction.