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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: orange on June 20, 2005, 07:57:26 AM

Title: removing oxide
Post by: orange on June 20, 2005, 07:57:26 AM

In A2000 (and some other Amigas) the common problem is battery leakage producing some green stuff (oxide?) on CPU pins and socket.
What is good way of removing it (without damaging pins)?
Is it ok to use ordinary (pencil) eraser on CPU pins?

 :hammer:

Title: Re: removing oxide
Post by: doctorq on June 20, 2005, 08:06:26 AM

Most people recommend using isopropyl alcohol when cleaning up the mess a leaking battery has caused.

Title: Re: removing oxide
Post by: orange on June 20, 2005, 10:15:09 AM

unfortunately, it is not enough for removing large oxidation

Title: Re: removing oxide
Post by: fillosauru on June 20, 2005, 10:51:33 AM

I have succesfully removed oxidation from my memory extension for A500 using general-purpose house cleaner (containing not bleach, but citric acid); The citric acid is mild enough not to attack the traces, and strong enouch to dissolve the oxid;
Of course that afterwards I have brushed the board with a clean, wet cloth (prefferable distilled water), to remove the excess of cleaner

Title: Re: removing oxide
Post by: Lemonty on June 20, 2005, 07:06:45 PM

Since battery leakage is acidic (low Ph), shouldn't you use a basic substance (high Ph) like a soap? I've cleaned (litteraly) an A4000 mobo with laundry detergent. It had the battery removed when I got it but the traces showed signs of ongoing corrosion within. After soaking the whole pcb in detergent for a day the board seemed to be neutralized. This was a year ago and no problems yet. Looks corrosion free.

Title: Re: removing oxide
Post by: Chain on June 22, 2005, 11:19:24 AM

I thing its interesting to neautralize acid! Corrosion will be  stopped fos sure.
But what do you thing about a poor dilution of baking soda?
Im afraid of a some strange reaction with acid from battery in the worst case.  :-(