Clevo NP50DB, Service Manual

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Disassembly
Overview 2 - 3
2.Disassembly
Maintenance Precautions
The following precautions are a reminder. To avoid personal injury or damage to the computer while performing a re-
moval and/or replacement job, take the following precautions:
1. Don't drop it . Perform your repairs and/or upgrades on a stable surface. If the computer falls, the case and other components
could be damaged.
2. Don't overheat it . Note the proximity of any heating elements. Keep the computer out of direct sunlight.
3. Avoid interference . Note the proximity of any high capacity transformers, electric motors, and other strong magnetic fields.
These can hinder proper performance and damage components and/or data. You should also monitor the position of magnet-
ized tools (i.e. screwdrivers).
4. Keep it dry . This is an electrical appliance. If water or any other liquid gets into it, the computer could be badly damaged.
5. Be careful with power . Avoid accidental shocks, discharges or explosions.
•Before removing or servicing any part from the computer, turn the computer off and detach any power supplies.
•When you want to unplug the power cord or any cable/wire, be sure to disconnect it by the plug head. Do not pull on the wire.
6. Peripherals – Turn off and detach any peripherals.
7. Beware of static discharge . ICs, such as the CPU and main support chips, are vulnerable to static electricity. Before han-
dling any part in the computer, discharge any static electricity inside the computer. When handling a printed circuit board, do
not use gloves or other materials which allow static electricity buildup. We suggest that you use an anti-static wrist strap
instead.
8. Beware of corrosion . As you perform your job, avoid touching any connector leads. Even the cleanest hands produce oils
which can attract corrosive elements.
9. Keep your work environment clean . Tobacco smoke, dust or other air-born particulate matter is often attracted to charged
surfaces, reducing performance.
10. Keep track of the components . When removing or replacing any part, be careful not to leave small parts, such as screws,
loose inside the computer.
Cleaning

Power Safety
Warning
Before you undertake
any upgrade proce-
dures, make sure that
you have turned off the
power, and discon-
nected all peripherals
and cables (including
telephone lines and
power cord). It is advis-
able to also remove
your battery in order to
prevent accidentally
turning the machine
on.
Do not apply cleaner directly to the computer, use a soft clean cloth.
Do not use volatile (petroleum distillates) or abrasive cleaners on any part of the computer.
(For Computer Models Supplied with Light Blue Cleaning Cloth) Some computer models in this series come sup-
plied with a light blue cleaning cloth. To clean the computer case with this cloth follow the instructions below.
• Power off the computer and peripherals.
• Disconnect the AC/DC adapter from the computer.
• Use a little water to dampen the cloth slightly.
• Clean the computer case with the cloth.
• Dry the computer with a dry cloth, or allow it time to dry before turning on.
• Reconnect the AC/DC adapter and turn the computer on.