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Old 18th March 2012, 12:27 AM   #11
DREW028 is offline DREW028  United States
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I have corrosion in a few feed throughs on the pre amp board. They are not as bad as the ones in the photo but you cannot see through. Is there something I could spray on and maybe blow them out with air?
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Old 19th March 2012, 01:13 AM   #12
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If there is corrosion, most likely it has damaged the foil in the Via's. Your better off drilling them out, scraping the runs on each side to remove the coating and soldering a jumper wire through the Via, where ever there is corrosion.
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Old 19th March 2012, 06:28 AM   #13
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Yep. What he said. The green substance is what's left of the copper that connects the traces on each side of the board.
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