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Old 08-16-2004, 10:35 PM   #11
Dave Holmes
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I would still wash it with IPA after "pressure washing" with contact cleaner. Contact cleaners often have lubricants of their own in the formula, and given the micro amp currents modern electronics can operate on, I prefer not to have anything on the PCB that wasn't there originally.

However, it always comes down to what's available and what works for you. Often quick action that is not 100% by the book is better in the long run than delayed action waiting for just the right stuff.

One thing NOT to do is air dry it with forced air. Just as a helicopter's rotor creates a static charge that can knock you on your tail, blowing air across a circuit board can cause sufficient static to be built up to zap certain components of the CMOS variety. So, just set it on a flat surface and let natural evaporation take care of it.

Hope everything works out.

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Old 08-18-2004, 12:51 PM   #12
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You can purchase 100% Isopropyl alcohol from some drug stores. The regular stuff is diluted with water which is no good for electronics. You will have to ask the pharmacist since they keep it behind the counter. Let them know it is for cleaning electronics and don't try to clean cuts or abrasions with it since it will be too strong at 100%.

Contact cleaner is great because it comes in a pressurized can which makes it easier to apply. The chemicals are much stronger so you should also be more aware of any health and safety effects. Otherwise, Isopropyl alcohol works just as good and is much cheaper. ( keep it away from sparks and flames )
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Old 08-18-2004, 03:46 PM   #13
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What about "methyl hydrate".... (methanol). This stuff comes from home depot, is called "stove fuel", and the label reads 99.9%methanol

I have used this stuff regularly to thin epoxy, and other general things... for the record though, is this the same stuff as isopropyl alcohol?

if only...
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Old 08-18-2004, 05:42 PM   #14
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Gus, that is the main ingredient in glow fuel, and is not quite as friendly as the IPA.
Ron Mattiuz

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"Flying an airplane is just like riding a bike...except it's harder to put cards in the spokes"
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Old 08-18-2004, 06:22 PM   #15
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A lite application of pressure with a non-static cleaning brush would help to ensure zero residue on the board.

Again I would choose the IPA, and no not a Keith's although you could have one or two after you are finished , over the methenol.

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