Vintage Synth Repair

Thanks Brian! I will check into it.
--- In vintagesynthrepair@yahoogroups.com, "Brian Davies" <brian@...>
wrote:
>
;> You need to neutralize the acid , the chemical I use is bicarbonate

of soda,
> a teaspoonful in a glass of warm water will work.  Then rinse with warm
> water, dry thoroughly before powering up.&#13;
>  
> 73
> Brian G3OYU
> www.g3oyu.co.uk
> www.surreyraynet.net
>  
>   _____  
0;> 
> From: vintagesynthrepair@yahoogroups.com
> [mailto:vintagesynthrepair@yahoogroups.com] On Behalf Of plastikanimal
> Sent: Wednesday, 04 June 2008 18:46
> To: vintagesynthrepair@yahoogroups.com
> Subject: [vintagesynthrepair] Re: Korg POLY-61 pitch drift problem
>  
> I used soap and water on the cpu board. The voice board didn't seem
> to
have any acid on it except in one spot where the acid
seemed to
> move
0;along the "jumper ribbon". I cleaned that with a
Q-tip,soap

> and water.
It ended up eating traces for a couple of
&#10;capacitors and
> a transistor.
The "high" and "bend" adjustments are just
below this
> spot so maybe
it's gotten to them as well.
--- In
> vintagesynthrepair@ <mailto:vintagesynthrepair%40yahoogroups.com>
> yahoogroups.com, "Brian Davies"
> <brian@>
wrote:
>
> How did you clean off the
> battery acid?
> 
> Regards
> Brian
> G3OYU
> www.g3oyu.co.uk
> 
> _____

>
> 
> From: vintagesynthrepair@
> <mailto:vintagesynthrepair%40yahoogroups.com> yahoogroups.com
>
> [mailto:vintagesynthrepair@
<mailto:vintagesynthrepair%40yahoogroups.com>
> yahoogroups.com] On Behalf Of plastikanimal
> Sent:
Wednesday, 04
> June 2008 08:26
> To: vintagesynthrepair@
> <mailto:vintagesynthrepair%40yahoogroups.com> yahoogroups.com
>
> Subject: [vintagesynthrepair] Korg POLY-61 pitch drift
problem
>
> 
> Hi, I'm trying to repair a POLY-61 for a friend. I have
> very
> little
experience at this.(I replaced the
battery
> in mine so he
> thinks I'm3;
a
genius).
Anyway, I
> replaced his
&#10;battery,but
> some of the ni-cad acid
found
> it's
way across to the voice
board. I
>
&#10;had to
> replace a transistor and some
other things.&#13;
I
thought I
> had
> it right, but after a few minutes voice
2 and 3
> begin to
drift up&#13;
> in pitch to no end. I don't
know if I
> used&#13;
the wrong parts
or if
> something
else is
> wrong.

Any ideas?
> 
> &#13;
>
> 
> 
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