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Safety precautions
Warning! Always completely disconnect the power cord from
your chassis whenever you are working on it. Do not
make connections while the power is on because
sensitive electronic components can be damaged by
the sudden rush of power. Only experienced electron-
ics personnel should open the PC chassis.
Caution! Always ground yourself to remove any static charge
before touching the CPU card. Modern electronic
devices are very sensitive to static electric charges.
Use a grounding wrist strap at all times. Place all
electronic components on a static-dissipative surface
or in a static-shielded bag when they are not in the
chassis.
Removing the CPU
The PCM-6896 all-in-one CPU module supports most 486 CPUs.
The system's performance depends on the CPU you choose. You
can install or upgrade the CPU in the board's PGA socket by
following the procedures outlined below. If your system has an
existing CPU, you need to remove it before installing the new CPU.
Removing a CPU
1. Disconnect power from the chassis, and unplug all connections
to the CPU card. Then, remove the CPU card from the chassis
by following the instructions in the user's manual for your
chassis.
2. Lift the CPU out of the PGA socket. The old chip may be
difficult to remove. You may find spray chip lubricant, designed
for pin-grid-array (PGA) devices, and a chip puller helpful.
These are available at electronics hobbyists' supply stores.