General Rules For Installing Options; Precautions - NEC POWERMATE PROFESSIONAL 9000 Service Manual

3-2 Option Installation
All internal option installation procedures require the removal of the system unit cover.
Procedures for removing the cover are included in this section. For procedures on installing
external options, see "External Options" at the end of this section.

GENERAL RULES FOR INSTALLING OPTIONS

Follow these general rules when installing system options.
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Turn off system power and unplug the power cable.
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Turn off and disconnect all peripherals.
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Before unplugging the power cable or handling boards or chips, touch the system
unit frame to discharge static.
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Do not disassemble parts other than those specified in the procedure.
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All screws are Phillips-head, unless otherwise specified.
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Label connectors before removing them. Note where the connector goes and in
what position it was installed.

PRECAUTIONS

Take care when working inside the system unit and when handling computer components.
Avoid electric shock or personal injury by observing the following warning and caution.
Static electricity and improper installation procedures can damage computer components.
Protect computer components by following these safety instructions.
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Avoid carpets in cool, dry areas. Leave an option, such as a board or chip, in its
anti-static packaging until ready to install it.
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Dissipate static electricity before handling any system components (boards, chips)
by touching a grounded metal object, such as the system's unpainted metal chassis.
WARNING: Before removing the system unit
cover, turn off the power and unplug the system
power cable. Power is removed only when the
power cable is unplugged.
CAUTION: Electrostatic discharge can damage
computer components. Discharge static
electricity by touching a metal object before
removing the system unit cover.