Modifying the Logic Board:
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1) Plug in and turn on your soldering iron. Make sure it is at the proper operating temperature
before trying to unsolder any parts. Also, to prevent any possible damage to static-sensitive
components be sure you are using a soldering iron with a grounded tip or one rated as ESD
safe.
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2) Locate the short piece of Solder-Wick braid and carefully remove solder from each end of
R212. While alternately heating each end of the resistor carefully apply a slight upward
pressure with the soldering iron tip to remove the old 4.7K ohm [472] resistor. You will need
to break the part loose from the glue holding it in place while the solder is hot. CAUTION:
The pads can easily be damaged or lifted from the board. Use the minimum amount of heat
and force necessary to remove the part.
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3) Clean off the old solder from the pads using the Solder-Wick braid.
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4) Locate the small piece of solder and carefully apply a thin coating of fresh solder to the pads.
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5) Locate the new 10K ohm [103] resistor, and using a small pair of tweezers, position it across
the pads in the same position as the old resistor. While holding it in position, touch the tip of
the soldering iron to one end of the resistor and its corresponding pad, letting the solder melt
thoroughly before removing the soldering iron tip. In like manner, solder the other end of the
resistor to its pad.
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6) Carefully inspect the connections with a magnifier and if necessary reheat the connections,
applying extra solder if needed.
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7) Locate the short piece of Solder-Wick braid and carefully remove solder from each end of
R101. While alternately heating each end of the resistor carefully apply a slight upward
pressure with the soldering iron tip to remove the old 100K ohm [104] resistor.
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8) Locate the small piece of solder and carefully apply a thin coating of fresh solder to the pads.
There is no need to re-glue the new parts.
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9) Locate the new 47K ohm [473] resistor, and using a small pair of tweezers, position it across
the pads in the same position as the old resistor. While holding it in position, touch the tip of
the soldering iron to one end of the resistor and its corresponding pad, letting the solder melt
thoroughly before removing the soldering iron tip. In like manner, solder the other end of the
resistor to its pad.
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10) Carefully inspect the connections with a magnifier and if necessary reheat the connections,
applying extra solder if needed.
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11) Locate the short piece of Solder-Wick braid and carefully remove solder from each end of
C264. While alternately heating each end of the resistor carefully apply a slight upward
pressure with the soldering iron tip to remove the old chip capacitor.
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12) Locate the small piece of solder and carefully apply a thin coating of fresh solder to the pads.
