To remove an Integrated Circuit, use a tiny wire cutters as shown here, cutting
the plastic IC package from the solder pins.
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Put the flat side of the cutters against the chip's edge and snip the
pins as close to the plastic package as possible.
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Here, the IC has been cut off from all its pins. Notice that the
location of pin 1 is marked on the board. If it isn't, make a mark
yourself before cutting out the IC.
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Next, pull the IC pins out of the circuit board one at a time.
Use a small needle-nose pliers to grab the pin on the component side of the
board. Melt the solder on the foil side of the board and pull
out the pin.
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After removing the pins use a solder-sucker to remove all the old solder
from the printed circuit pads and holes.
Then wash the printed circuit pads with MEK (methyl ethyl keytone).
Use a solvent dispenser and an acid brush as shown here.
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This is a standard acid brush but cut the bristles down to
about 1/4" inch in length. The brush should be stiff enough to scrub dried
solder resin and residue from the printed pads.
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Repeated heating of printed circuit pads causes them to lift off the
circuit board and break.
That's why you should install an IC socket into the cleaned out holes.
Should the IC fail again, no more soldering is required.
Mount the socket flush against the circuit board.
Align pin 1 of the socket to the pin 1 hole.
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On the board's underside, bend over two corner pins so the
socket doesn't fall out before you solder it.
Then solder the pins
to the clean circuit pads. Hold the socket to the board
for the first couple of solders so it remains flush.
Here you see four of the fourteen socket pins soldered.
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Finally, install the new IC into the new socket. Again, be sure
pin 1 of the IC goes into pin 1 of the socket.
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