1 − Introduction
Environmental considerations
The unit may be used in most areas, but to maintain top performance, and prolong operating life, observe the following environmental conditions:
•Avoid exposing it to extremes of temperature and humidity and avoid mechanical shocks and vibration.
•Keep the unit away from strong magnetic fields (TV sets, computer monitors, large electric motors, etc.).
•The nominal temperature should be between 5°C and 35°C (41°F and 95°F).
•Relative humidity should be 30 to 90 percent.
•As the unit may become hot during operation, always leave sufficient space above the unit for ventilation. Do not install this unit in a confined space such as a bookcase, and do not put anything on top of the unit.
•Avoid installing this unit on top of any
•The voltage supplied to the unit should match the voltage as printed on the rear panel. If you are in any doubt regarding this matter, consult an electrician.
•Make sure that the unit is mounted in a level position for correct operation.
Handling of optical discs
Observe the following:
•Always place discs in the tray with their label facing upward (discs used in the
•To remove a disc from its storage case, press down on the center of the case, and lift the disc out, hold- ing it carefully by the edges.
Figure 1.2: Handling of discs
•Finger marks and dust should be carefully wiped off the disc’s recorded surface with a soft cloth.
Unlike conventional records, the compact disc has no grooves to collect dust and microscopic debris, so gently wiping with a soft cloth should remove most particles.
•Wipe in a straight motion from the inside to the out- side of the disc. Small dust particles and light stains will have absolutely no effect on reproduction qual- ity.
Figure 1.3: Cleaning discs
•Never use such chemicals as record sprays, antistatic sprays or fluid, benzine or thinner to clean compact discs. Such chemicals will do irreparable damage to the disc’s plastic surface.
•Discs should be returned to their cases after use to avoid serious scratches that could cause the laser pickup to “skip”.
•Don’t expose discs to direct sunlight or high humid- ity and temperature for extended periods.
Long exposure to high temperature can warp the disc.
•Only use circular discs. Avoid using
Figure 1.4: Avoid using non-circular discs
•To keep the laser pickup clean, and don’t touch it. For the same reason, don’t leave the disc tray opened unnecessarily.
•Music discs with copy control, a
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