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,
Martin Ator <cyllall@...> wrote:
>
- and a fault appeared...
> Are you listening on headphones or the main out?
>
>
>
>
> ________________________________
> From: Quazimodo <noddyspuncture@...>
> To: korgpolyex@yahoogroups.com
> Sent: Sunday, 9 December 2012, 19:12
> Subject: [korgpolyex] Battery backup mod
>
in with a question..!?
>
> Â
> Hi guys,
>
> I'm new to the group - hello, and hope you don't mind me diving straight
>
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.
> I have a Poly800 Mk1. I just performed the battery back up mod as outlined
>
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...!?
> But I noticed that on notes played in the lowest octave, (on patches that
>
and D15 near to where the battery symbol is and where I put my holder.
> Now, to perform the mod the instuctions told me to remove: C87, C88, D23
>
files section here and there is a battery backup mod that describes a completely
different method - removing R1 and D1...!
> I am now wondering if this might be the cause as I have just looked in our
>
it was definitely not doing this last time I used it - and before I performed
this mod..!
> I would need to take the synth apart and reverse the procedure to see, as
>
and is just coincidental?
> Could anyone please tell me if this might be a 'fault' that has appeared
>
> Many thanks for any help.
> Cheers,
> TOM
>