For those who want the details, here goes a simple explanation.
The E-115 is set to run at 131 MHz. To make the processor
run at this speed, the factory will place a resistor at
Pin 1 between the adjacent points. This resistor is tested
at about 100K Ohms. Pins 2 and 3 are left open, not connected,
or as Logic 0s. The Processor can run at many different
speeds, depending on the configuration of these three
selector pins. You can actually underclock your device
by changing the configuration that is already in place!
Since we are concerned with keeping things simple (and
to keep things stable), I will just deal with overclocking
your device to 168 MHz.
Since trying to solder a resistor between the two tiny
points on the Main Board proves to be an arduous task
for most, it is far easier to use the natural resistance
of graphite in its place! Your average number 2 pencil
has the perfect lead for it (actually not made of lead
though). Take your pencil and practice on a sheet of paper
first. Pull out your Ohm meter and measure the resistance
betwen two ends of a heavily drawn line of lead. You can
practice until you have about 100K Ohms. If an Ohm-Meter
is too overwhelming for you to operate, then this will
become a "guessing" game as to how much led
it will take! Read on to learn approximately how much
will be needed.
Once you understand the resistance of lead is affected
by how much is placed down, you are ready to move to your
board. Keep your pencil fairly sharp for this, but do
not apply too much pressure. You will need to connect
the terminals on Pin 2 by drawing a line between them,
similar to how you did it on paper. A lot of excess lead
will result which you should be able to gently blow away!
Make sure that you confine the pencil lead to the white
box that surrounds it on the board. You don't want to
connect one terminal of Pin 2 to one on Pin 3! The diagram
below should help! For those who don't want to mess with
an Ohm Meter-a good rule of thumb for how much lead should
be used on the board, from my experience, is approximately
10-12 passes. For those with an Ohm Meter, you can test
the resistance right on the board! It is not important
for the Resistance to be exactly 100K Ohms, it can be
close, however, keep it in the + or - 10K Ohms area!
Thats all you have to do to overclock! Using only a pencil!
Now you should be ready to put your unit back together.
Go on to the next step to receive some tips on rebuilding.