Korg Poly800/EX800 Users

Calm down, it's on my Poly Mk-1 as well. It most likely should be there.

The chip is an 80c85 processor, there isn't much that can be modded to that. 
Chances are the designer of the pcb board forgot a trace and they had to
add one that way after the boards were made, or that there simply was no
way to route the trace and it was added that way.

Basically, it should be there.

On Fri, Nov 22, 2002 at 01:38:54AM -0000, Mike Walters wrote:
> I've owned this Poly800 for 10 years, and I noticed the first time I 
> opened it there was a jumper wire soldered between pin 20 and 22 on 
> IC24. The chip is smudged, but looks numbered MSM80085ARS 3924. What 
> kind of mod might this be?!? I didn't do it!!
> 
> -Mike Walters
> www.mysterycircuits.com
> 
> 
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> 
>

I've owned this Poly800 for 10 years, and I noticed the first time I 
opened it there was a jumper wire soldered between pin 20 and 22 on 
IC24. The chip is smudged, but looks numbered MSM80085ARS 3924. What 
kind of mod might this be?!? I didn't do it!!

-Mike Walters
www.mysterycircuits.com

Hmmm... I wondered because the previous owner did all kinds of dodgy 
wiring on the thing. I have it side by side with another Poly800, and 
that one doesn't have the jumper. It's probably a newer version, I 
assume. Also, there's an array of LED's on my board, and on the parts 
board, it's just regular diodes. I know it's the same thing really, 
it's just neat to see electronic idiosyncracies of 2 "identical" 
boards. 
-Mike Walters
www.mysterycircuits.com

--- In korgpolyex@y..., trip@b... wrote:
> 
> Calm down, it's on my Poly Mk-1 as well. It most likely should be 
there.
> 
> The chip is an 80c85 processor, there isn't much that can be modded 
to that. 
> Chances are the designer of the pcb board forgot a trace and they 
had to
> add one that way after the boards were made, or that there simply 
was no
> way to route the trace and it was added that way.
> 
> Basically, it should be there.
> 
> 
> On Fri, Nov 22, 2002 at 01:38:54AM -0000, Mike Walters wrote:
> > I've owned this Poly800 for 10 years, and I noticed the first 
time I 
> > opened it there was a jumper wire soldered between pin 20 and 22 
on 
> > IC24. The chip is smudged, but looks numbered MSM80085ARS 3924. 
What 
> > kind of mod might this be?!? I didn't do it!!
> > 
> > -Mike Walters
> > www.mysterycircuits.com
> > 
> > 
> > To unsubscribe from this group, send an email to:
> > korgpolyex-unsubscribe@y...
> > 
> >  
> > 
> > Your use of Yahoo! Groups is subject to 
http://docs.yahoo.com/info/terms/ 

> > 
> > 
> > 
> > 
> >