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Inside The System Unit - Mitsubishi Electric Apricot LS 550 Owner's Handbook Manual

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This appendix provides instructions regarding access to the inside of
your computer system for the purposes of maintaining or upgrading
the system. Details of the various jumper switches are included and
instructions to replace the battery are also provided. The only tool
required is a small cross head screwdriver.
Turn off the computer and unplug all power cords before removing the
system unit cover.
Anti-static precautions
Static electricity can cause permanent damage to electronic
components. You should be aware of this risk, and take precautions
against the discharge of static electricity into the computer.
Static electricity can be generated by moving on a chair, brushing
against desks or walls, or simply walking across an ordinary carpet.
Items handed from one person to another, or being wrapped or
unwrapped, can acquire a static charge. Air conditioning systems
can also result in very high levels of static.
Clothing made of synthetic fibres is particularly likely to generate
static electricity; this static electricity is often completely unnoticed
by the wearer, but can be sufficient to cripple or destroy sensitive
electronic components in computers.
The computer is at risk from static discharge while the system unit
cover is off, as the electronic components of the motherboard are
exposed. Memory modules, cache upgrades and OverDrive
processors are other examples of electrostatic sensitive devices (ESSDs).
All work that involves removing the cover must be done in an area
completely free of static electricity. We recommend using a Special
Handling Area (SHA) as defined by EN 100015-1: 1992. This
means that working surfaces, floor coverings and chairs must be
connected to a common earth reference point, and you should wear
I n s i d e t h e S y s t e m U n i t


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