Korg Poly800/EX800 Users

Due to economic factors, I am forced to part with my Poly-800.
It is in excellent shape as I am the original owner.
Includes power adapter, original owner's manual and box.
I live in southeastern Pennsylvania.
$300 plus shipping takes it.
Contact me offline with any questions.
-Craig

This sounds exactly like the battery died and you lost all the patches. Try loading them again and see if that fixes it.

Don B.

--- In korgpolyex@yahoogroups.com, vlad stoica <vladstoica_arh@...> wrote:
>
> My Poly 800 acts strange and I don't know what's wrong with it.
>
> It was fine yesterday but after cleaning my desk today, it just sounds as if the
> signal would be influenced only by Noise and VCF.. it makes a very slow attack
> noisy vcf sound with all the patches.. they differ somewhat and playing with the
> parameters from Noise and VCF affects the sounds it makes to some extent.
>
> If anyone has come across this behavior please tell me what is wrong with my
> Poly 800.
> I am devastated by this.
>

Don't worry it's just the internal battery, but the patches you had in the memory
are gone, if you don't have a backup you've lost your patches... I've put a socket
on my poly so I can use a regular CR 3025 battery, it can't be easier...


Em 23/06/2011 17:47, vlad stoica < vladstoica_arh@... > escreveu:

Found one here:

http://analog.no/cms/index.php?option=com_content&view=article&id=50&Itemid=49

Anyways just google it "poly 800 battery mod" and you will find a lot of info...

As I own the Poly 800 II it was an easier mod but I believe that in your case the
best choice is just swap the external batteries, thouse for operating it without
a power adaptor, they keep the memory alive too, I wouldn't mess around with
the circuit that much just to put an internal battery, in my case it was just take
out the original battery and solder a socket in the same place.

Offtopic: For thouse of you wondering how to make the VCF CV IN mod it's the
same pin in VR2 where the moog slayer mod take place, just put a diode, for
example an 1N4148 between the positive CV and VR2, ground the negative CV,
keep the voltages between -5 and +5 V and you are good to go. Using Expert
Sleepers Silent Way I get a ditional LFOs in sync and with multiple waveforms
as modulation sources for the VCF, including S&H.


Em 24/06/2011 03:04, vlad stoica < vladstoica_arh@... > escreveu:

this is exactly what happens when the old battery dies:
some weird patch with noise etc, on all the presets.
so:
it is very easy:
get a battery clip from a PC motherboard, or same type.
(carefully) unsolder the existing dead battery (it was
soldered in in mine)

then connect in its place the new battery clip.
fit a new battery and you're good to go. if it
dies again, next time you'll just have to clip
a new battery in.
be careful not to overheat anything, and you
should be ok.

--- In korgpolyex@yahoogroups.com, vlad stoica <vladstoica_arh@...> wrote:
>
> Thanks Donald and Bill for your fast help !
>
> I suspected that the internal battery might be at fault here but there was no
> way for me to know for sure.
> I'm glad the synth is OK. :)
> I am now looking for a tutorial in changing the internal battery of the Poly.
> If you guys have a good link to one it would be greatly appreciated.
>
> Thank you again!
> Vlad
>

You can also have patch parameters overwritten with random values if
the Poly-800 crashes because of a MIDI overrun.

Alex

On 24 Jun 2011, at 15:57, k9k9dog wrote:

> this is exactly what happens when the old battery dies:
> some weird patch with noise etc, on all the presets.
> so:
> it is very easy:
> get a battery clip from a PC motherboard, or same type.
> (carefully) unsolder the existing dead battery (it was
> soldered in in mine)
>
> then connect in its place the new battery clip.
> fit a new battery and you're good to go. if it
> dies again, next time you'll just have to clip
> a new battery in.
> be careful not to overheat anything, and you
> should be ok.
>
> --- In korgpolyex@yahoogroups.com, vlad stoica <vladstoica_arh@...>
> wrote:
>>
>> Thanks Donald and Bill for your fast help !
>>
>> I suspected that the internal battery might be at fault here but
>> there was no
>> way for me to know for sure.
>> I'm glad the synth is OK. :)
>> I am now looking for a tutorial in changing the internal battery
>> of the Poly.
>> If you guys have a good link to one it would be greatly appreciated.
>>
>> Thank you again!
>> Vlad
>>
>
>
>
>
> ------------------------------------
>
> Feel free to upload into the files section any sysex dumps and tape
> dumps of patches that you may have but please discuss (with the
> entire group) the posting of other files *before* posting them.
> This helps us to keep redundant information from showing up
> everywhere and also allows us to constantly improve the format and
> structure of the documentation. We talk about the HAWK-800 quite a
> bit but we also discuss and help owners of the original Poly-800
> models. So don't be shy if you haven't got the HAWK-800.Yahoo!
> Groups Links
>
>
>

If you still need help, you can check out my video on battery replacement for synths....

http://www.youtube.com/watch?v=hZEQJZy00NY

Always use flux and clean area with isopropyl alcohol after the job is done...

J.

--- In korgpolyex@yahoogroups.com, vlad stoica <vladstoica_arh@...> wrote:
>
> Thanks Donald and Bill for your fast help !
>
> I suspected that the internal battery might be at fault here but there was no
> way for me to know for sure.
> I'm glad the synth is OK. :)
> I am now looking for a tutorial in changing the internal battery of the Poly.
> If you guys have a good link to one it would be greatly appreciated.
>
> Thank you again!
> Vlad
>