Discussion about the Korg PolySix synthesizer

Any help would be more than greatly appreciated. I recently bought a 
non working Polysix figuring the obvious.  I opened it up and removed 
the varta battery and cleaned any noticeable corrosion with isopropyl 
alc. 70%.  I closed it up for now to play around with it for a bit.  
Nearly every key was dead but the two or three that did work allowed 
me to test things out.  Aside from sounding scratchy and 
unpredictable i.e. random sounds, sporadic led changes, the sound 
responded to ALL knob movements.  Every single one.  I figured that 
maybe the battery damage wasnt that bad.  So I opened it back up the 
following day to clean all key contacts, (now all keys work 100%), 
and picked up some 90% isopropyl and clean the board a little more.  
I fear I went wrong here as my next step was using a deoxit pen to 
further clean the battery area as well as spraying some contact 
cleaner on the panel boards underneath the front panel KLM-370.  I 
was obviously trying to clean out the pots and figured that was the 
most effective way at getting at them.  I closed it back up and it 
sounded perfect.  Everything works except VCF and ADSR.  The 
programmer even seems to work although I have yet to put a new 
battery in.  Im wondering if I shorted something with either the 
deoxit or the contact cleaner and if so what? Or if it is just a bad 
traced that worked for a minute and now has gone bad? Again I would 
really appreciate any help.  Ive scoured this group as well as 
analogue heaven, old crow's etc and can't find anyone with the same 
problem of just those two funcions not working.

wiggle the connectors. 
Then dL the schematics and learn the thing inside out. that is what Im
doing.  

Isnt working on these beast fun ;-\

I almost forgot I bought this thing to make music on, not to get my
electronics degree again ;-)

--- In PolySix@yahoogroups.com, "scottboardway" <scottboardway@...> wrote:

>
> Any help would be more than greatly appreciated. I recently bought a 
> non working Polysix figuring the obvious.  I opened it up and removed 
> the varta battery and cleaned any noticeable corrosion with isopropyl 
> alc. 70%.  I closed it up for now to play around with it for a bit.  
> Nearly every key was dead but the two or three that did work allowed 
> me to test things out.  Aside from sounding scratchy and 
> unpredictable i.e. random sounds, sporadic led changes, the sound 
> responded to ALL knob movements.  Every single one.  I figured that 
> maybe the battery damage wasnt that bad.  So I opened it back up the 
> following day to clean all key contacts, (now all keys work 100%), 
> and picked up some 90% isopropyl and clean the board a little more.  
> I fear I went wrong here as my next step was using a deoxit pen to 
> further clean the battery area as well as spraying some contact 
> cleaner on the panel boards underneath the front panel KLM-370.  I 
> was obviously trying to clean out the pots and figured that was the 
> most effective way at getting at them.  I closed it back up and it 
> sounded perfect.  Everything works except VCF and ADSR.  The 
> programmer even seems to work although I have yet to put a new 
> battery in.  Im wondering if I shorted something with either the 
> deoxit or the contact cleaner and if so what? Or if it is just a bad 
> traced that worked for a minute and now has gone bad? Again I would 
> really appreciate any help.  Ive scoured this group as well as 
> analogue heaven, old crow's etc and can't find anyone with the same 
> problem of just those two funcions not working.
>

You probably cleaned off some bad traces that were only conducting
through the oxidized corrosion stuff.  Look for those traces and
replace them.  Good luck!

On Dec 12, 2007 7:57 AM, scottboardway <scottboardway@yahoo.com> wrote:
> Any help would be more than greatly appreciated. I recently bought a
> non working Polysix figuring the obvious.  I opened it up and removed
> the varta battery and cleaned any noticeable corrosion with isopropyl
> alc. 70%.  I closed it up for now to play around with it for a bit.
> Nearly every key was dead but the two or three that did work allowed
> me to test things out.  Aside from sounding scratchy and
> unpredictable i.e. random sounds, sporadic led changes, the sound
> responded to ALL knob movements.  Every single one.  I figured that
> maybe the battery damage wasnt that bad.  So I opened it back up the
> following day to clean all key contacts, (now all keys work 100%),
> and picked up some 90% isopropyl and clean the board a little more.
> I fear I went wrong here as my next step was using a deoxit pen to
> further clean the battery area as well as spraying some contact
> cleaner on the panel boards underneath the front panel KLM-370.  I
> was obviously trying to clean out the pots and figured that was the
> most effective way at getting at them.  I closed it back up and it
> sounded perfect.  Everything works except VCF and ADSR.  The
> programmer even seems to work although I have yet to put a new
> battery in.  Im wondering if I shorted something with either the
> deoxit or the contact cleaner and if so what? Or if it is just a bad
> traced that worked for a minute and now has gone bad? Again I would
> really appreciate any help.  Ive scoured this group as well as
> analogue heaven, old crow's etc and can't find anyone with the same
> problem of just those two funcions not working.
>
>
>
> PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6
> Yahoo! Groups Links
>
>
>
>



-- 
.sig
-Chromatest J. Pantsmaker
http://www.chromatest.net