Modifying The System Board; Replacing The Real-Time Clock Battery - NEC EXPRESS5800/120Rc-2 Service Manual

Modifying the System Board

The following sections provide procedures for upgrading and configuring the
system board in your system. Topics covered include:
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Replacing the real-time clock battery

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Removing and Installing a Pentium III processor
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Installing or removing DIMMs.
Electrostatic discharge (ESD) can damage add-in boards
and other components; place them on an antistatic surface.
Modify the system board only at an ESD workstation.
Otherwise, wear an antistatic wrist strap attached to chassis
ground.
Replacing the Real-time Clock Battery
You may need to replace the real-time clock battery because of its life span. The
battery (Vendor Part #CR2032) is a commodity part available through many
vendors. Notice the plus (+) sign on the battery. This sign will assist you in
correctly positioning the battery on the system board.
Danger of explosion if battery is incorrectly replaced.
Replace only with same or equivalent type recommended by
manufacturer. Dispose of lithium batteries as required by
local ordinance or as normal waste if no local ordinance
exists. Do not expose the component to excessive heat or
fire. Keep all batteries away from children
Observe static precautions. Use an antistatic wrist strap.
If you are removing the top cover after the system is set up,
you must first power off the system and all external devices
and then Unplug the system power cord
4-8 Disassembly and Reassembly
! CAUTION
! CAUTION
! CAUTION
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WARNING