Vintage Synth Repair

Dust? A paintbrush works with computers.
The acid? Rubbing alcohol. Dunno if it was a Lithium battery that leaked 
in your case tho.
Rust? Dremel tool.
Cigarette? I had a screen that was brown-looking due to this, even 
rubbing alcohol wouldn't remove it. I found out that the Lestoil in an 
"Hertel" spray bottle worked really well. The only problem is that it 
works very well, but only for about one or two wipes.

Brian Davies a \ufffdcrit :
>
> Hi Dale
>
> Given the suggested mixture the bi-carb solution is only very weakly 
> alkaline. I think you need to discover exactly what is in the battery 
> before deciding arbitrarily that it isn\ufffdt acid, albeit only very 
> weakly so.
>
> Further my considerable experience suggests that PCBs today and in the 
> foreseeable past, are not the delicate instruments you may think. Over 
> the years I have had to restore to working order many hundreds of 
> equipment, not only keyboard electronics but other much more so called 
> delicate instruments, what with the problems of static on CMOS chips 
> and surface mount devices. I have had to clean up PCBs that have been 
> covered with a thick layer of dirt and dust, others that have soft 
> drinks like coke and lemonade dropped over them, one even that had 
> whiskey poured through the ventilation holes and this was a high spec 
> oscilloscope. All survived the water treatment and drying out under 
> gentle heat, I don\ufffdt recall even one failure through dunking in water.
>
> If this specific case of battery leakage is either alkaline or acid 
> then distilled water is not going to neutralize it, it may wash off 
> what you can see, but what it won\ufffdt do is get rid of any lodged under 
> components. No I would go for bi-carb any time.
>
> **73**
>
> **Brian G3OYU**
>
> **www.g3oyu.co.uk** <http://www.g3oyu.co.uk>
>
> **www.surreyraynet.net** <http://www.surreyraynet.net>
>
> ------------------------------------------------------------------------
>
> *From:* vintagesynthrepair@yahoogroups.com 
> [mailto:vintagesynthrepair@yahoogroups.com] *On Behalf Of *Dale Kay 
> (Inquisitor Betrayer)
> *Sent:* Monday, 27 February 2006 20:53
> *To:* vintagesynthrepair@yahoogroups.com
> *Subject:* Re: [vintagesynthrepair] Leaking batteries and cigarette smoke.
>
> not really, only that one of the solutions is more or less alkaline 
> than the other...
>
> not necessary acid... and or other reactions taking place...
>
> use caution...
>
> depending on how well you can handle the board, maybe a little 
> distilled water is called for with a light scrub...
>
> after all, this isn't a car battery here in a old truck... it's a 
> delicate instrument that someone wants to restore to use again...
>
> dale
> dale@... <mailto:dale@...>
> Lancaster CA
>
> band web pages
> Inquisitor Betrayer
> http://www.inquisitorbetrayer.com
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>
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>
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>
>     ----- Original Message -----
>
>     *From:* Brian Davies <mailto:briang3oyu@...>
>
>     *To:* vintagesynthrepair@yahoogroups.com
>     <mailto:vintagesynthrepair@yahoogroups.com>
>
>     *Sent:* Monday, February 27, 2006 12:35 PM
>
>     *Subject:* RE: [vintagesynthrepair] Leaking batteries and
>     cigarette smoke.
>
>     Yes many times over the past 50 years as a service engineer,
>     including computer multilayer boards. Proof that there is some
>     acid content is the fact that the liquid bubbles as it neutralizes.
>
>     **73**
>
>     **Brian G3OYU**
>
>     **www.g3oyu.co.uk** <http://www.g3oyu.co.uk>
>
>     **www.surreyraynet.net** <http://www.surreyraynet.net>
>
>