The Aussie Pinball Arcade
Aussie Pinball Forums => Technical Matters => Handy hints and tips => Topic started by: Marty Machine on August 04, 2010, 12:08:58 AM
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HI all,
I'm working on a bally cpu PCB, which has some mild acid damage, but hasn't eaten thru anything, mainly surface level...
What do you guys prefer to use to clean/remove/seal acid damage?
thanx in advance,
MM.
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I have heard some people like to use Vinegar.
Beaky is the man to ask.
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With a 50% mixture of vinegar and water clean the board thoroughly, then rinse with water and then alcohol to remove the water. You can dry it with a hair dryer. Don't get any water on the dip switches, I doubt they are water tight.
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With a 50% mixture of vinegar and water clean the board thoroughly, then rinse with water and then alcohol to remove the water. You can dry it with a hair dryer. Don't get any water on the dip switches, I doubt they are water tight.
Exactly 100% right there Nick. I'm actually refurbishing six Bally -35 MPU boards with mild to bad corrosion. One of them is particularly nasty !
I've covered this process here - http://aussiepinball.com/index.php?topic=2343.0
I have a board I used for testing that was a total wreck. The vinegar trick works very well, as I refurbished this board 10 years ago. Not a trace of corrosion has re appeared.
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Point of correction - it ain't acid damage @.@ Batteries puke a corrosive material that is alkaline (and highly mobile!), hence the usefulness of the 50/50 vinegar solution to neutralise. As I am sure Nino has covered in his linked thread, mechanical removal, such as wire brush, glass fiber 'pens' and bead blasting are also useful in extreme cases.
cheers
Ian