Korg Poly800/EX800 Users

Hey thanks for all the replies guys. Much appreciated.

Yes, Don it is the Mk1 (reverse keys) - but the in-between version with the solder pads and a little battery symbol on the cct board in between them! I think what I shall do is reverse the mod I made (luckily I only cut component legs and can easily re-connect) and I'll do the R1/D1 mod instead. Funny though how I never noticed this top ovtave bleed-through before.

Thanks again,
TOM





--- In korgpolyex@yahoogroups.com, "backshall1" <backshall1@...> wrote:
>
> The mod to remove C87, 88 and D15, 23 results in the memory being powered
> only by the CR2032, even when the synth is powered on, which can reduce the
> CR2032 battery life. It also reduces C-cell life (if you use them) by
> leaving a drain through R1 and D1. By removing R1, D1 and soldering the
> wires over there and leaving the other components in place, the memory is
> powered by the internal 5V supply when the synth is turned on and by the
> lithium cell when it is turned off.
> 
> Is this one of the original Mk1 with no solder pads where the battery would
> eventually go, or the in-between one with solder pads but no battery?
> 
> In any case, it doesn't seem like either mod should have any affect on the
> audio output.
> 
>  
> 
> Don Backshall
> 
>  
> 
>   _____  
> 
> From: korgpolyex@yahoogroups.com [mailto:korgpolyex@yahoogroups.com] On
> Behalf Of Quazimodo
> Sent: Sunday, December 09, 2012 3:23 PM
> To: korgpolyex@yahoogroups.com
> Subject: [korgpolyex] Re: Battery backup mod - and a fault appeared...
> 
>  
> 
>   
> 
> Just checked it on headphones actually. I will listen through an amplifier
> and see if it's the same.
> 
> Cheers,
> TOM
> 
> --- In korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com> ,
> Martin Ator <cyllall@> wrote:
> >
> > Are you listening on headphones or the main out?
> > 
> > 
> > 
> > 
> > ________________________________
> > From: Quazimodo <noddyspuncture@>
> > To: korgpolyex@yahoogroups.com <mailto:korgpolyex%40yahoogroups.com>  
> > Sent: Sunday, 9 December 2012, 19:12
> > Subject: [korgpolyex] Battery backup mod - and a fault appeared...
> > 
> > 
> > Â  
> > Hi guys,
> > 
> > I'm new to the group - hello, and hope you don't mind me diving straight
> in with a question..!?
> > 
> > I have a Poly800 Mk1. I just performed the battery back up mod as outlined
> on a website I found. Just previous to this I had no sounds in the synth as
> it was not used for a while and after the mod I reloaded them all to check
> it out.
> > 
> > But I noticed that on notes played in the lowest octave, (on patches that
> are programmed 'low') I am getting the top high octave notes breaking
> through - very quietly in the background. I suspect it is probably there on
> all patches, but most apparent on the bassier ones...!?
> > 
> > Now, to perform the mod the instuctions told me to remove: C87, C88, D23
> and D15 near to where the battery symbol is and where I put my holder.
> > 
> > I am now wondering if this might be the cause as I have just looked in our
> files section here and there is a battery backup mod that describes a
> completely different method - removing R1 and D1...!
> > 
> > I would need to take the synth apart and reverse the procedure to see, as
> it was definitely not doing this last time I used it - and before I
> performed this mod..!
> > 
> > Could anyone please tell me if this might be a 'fault' that has appeared
> and is just coincidental?
> > 
> > Many thanks for any help.
> > Cheers,
> > TOM
> >
>