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Revision as of 23:18, 18 November 2010
CPU and other pin grid arrays (PGA) occasionally get bent and it is often difficult to straiten these pins.
Equipment
- Mechanical pencil. Metal preferable, but plastic works OK.
- knife: thickness must be small enough to fit between the pins
- Optional: Thin needle nose pliers
Technique
- Using the knife
- Have the blunt side facing down
- Side the pointy part of the knife through the lines of pins
- If ascetics are important, try not to scratch the chip
- Slide the knife in any direction that works
- For completely flattened (Be careful!) They can brake very easily
- Gently Use the knife to pick at it until it moves about 60 degrees or so. The use the pencil
- Using the pencil
- Remove the lead from the tip
- Slide the pin in the tip and bend it straight
- When the pins have multiple bends, you can stick the pencil a quarter of the way and bend it back. And continue utile its straight.
- Using the Chips Socket
- Ideally using a zero insertion force socket (ZIF)
- This requires a little finessing
- The pins can obviously be off by a 1/10 mm or more, and thats enough to make it not fit.
- Work in the chip by wiggling it
- Push firmly, but if the pins are off by too much, then they may flatten, and thats the worst thing that could happen