Chapter 2 Installation 13
CPU installing and upgrading
You can upgrade to a higher power Pentium CPU at any time.
Simply remove the old CPU, install the new one, and set the
jumpers for the new CPU type and speed.
Warning! Always disconnect the power cord from your
chassis when you are working on it. Do not
make connections while the power is on as
sensitive electronic components can be dam-
aged by the sudden rush of power. Only experi-
enced electronics personnel should open the PC
chassis.
Caution!
Always ground yourself to remove any static
charge before touching the PC board. 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.
1. If you are upgrading the CPU, remove the old CPU from the
socket. If it is difficult to remove, you may find chip lubricant
(designed for pin-grid-array devices, PGAs) and a chip puller
helpful. Both are available at electronics hobby supply stores.
2. Plug the new CPU into the empty socket. Follow the instruc-
tions that came with the CPU or math coprocessor. If you have
no instructions, do the following: Lubricate the CPU pins with
lubricant made for PGA devices. This will make the new CPU
slide in much more easily and reduce the chance of damaging
it. Next, carefully align the CPU so it is parallel to the socket
and the notch on the corner of the CPU corresponds with the
notch on the inside of the socket. Gently slide the CPU in.
There will probably be a gap between the CPU and the connec-
tor when it is fully seated - Do not push too hard!
When you install a new CPU, be sure to adjust the board settings,
such as CPU type and CPU clock. Improper settings may
damage the CPU.
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