Vintage Synth Repair

I have just purchased a broken poly 800 and all it does is play white
noise. Anyone have any idea of what might need replacing.
I am going to change the battery and then send sysex of original patches
but im guessing theres more to it than that.
Maybe one of the chips?
Thanks
Mark

The Poly-800 II I have does the same thing when it loses it's 
patches. The battery will only hold them for so long. The good thing 
about the Mk2 is you can reload it with a sysex file. The first Poly-
800's weren't so blessed. If it still won't play right after that let 
me know. My Mk2 has a pot for the noise that will crank it whenever 
it is needed. I also have the Mk2 Service Manual around here 
somewhere in this mess.....

Fran

--- In vintagesynthrepair@yahoogroups.com, francois <babouche369@...> 
wrote:
>
> 
> I had a Poly800 (first model) one time. And I remember having 
screwed it up by uploading a sysex form my DX7 (an accident while 
digging into DX7 menus); this tells how MIDI implementation was 
buggy. All the patches were gone, and it was only able to do a white 
noise, no matter which patch was selected. If memory serves, I have 
to issue a hard reset before being able to program any patch. Might 
worse a try. 
> If this doesn't work, welcome into synth bug tracking ... 
> Same noise on headphone and line out ouputs?
> Francois
> 
> 
> 
> To: vintagesynthrepair@...: freqspec@...: Sun, 26 Oct 2008 23:26:40 
+0000Subject: [vintagesynthrepair] poly800 mk2
> 
> 
> 
> 
> I have just purchased a broken poly 800 and all it does is play 
whitenoise. Anyone have any idea of what might need replacing.I am 
going to change the battery and then send sysex of original 
patchesbut im guessing theres more to it than that.Maybe one of the 
chips?ThanksMark 

> 
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> 
> _________________________________________________________________
>

I only have a german manual. does anyone have a manual for the mk2 in english? wink wink. Fran, how do you put it in sysex receive mode my friend. Ive got the

so just send the sysex from the computer then?

First off join the KorgPolyEX group. I have uploaded a copy of the 
owners manual to the files section of the group. 

Next there is a switch on the back to enable sysex dumps. I think it 
is the write program enable/disable switch. I have also uploaded the 
factory bank and another bank of patches. These are also available on 
the web if you search around.

I have the Service docs and schematics if you want them please e-mail 
me offlist. This has been a terrible week at work and it looks like 
it's going to get worse...

Fran
--- In vintagesynthrepair@yahoogroups.com, Scott Nordlund <gsn10@...> 
wrote:
>
> 
> I think you need to send a message first so that the synth expects 
to receive the midi data.
> 
> To: vintagesynthrepair@yahoogroups.com
> From: freqspec@...
> Date: Tue, 28 Oct 2008 09:07:27 +0000
> Subject: Re: [vintagesynthrepair] Re: poly800 mk2
> 
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>             so just send the sysex from the computer then?
> 
> 
> On Tue, Oct 28, 2008 at 7:17 AM, Scott Nordlund <gsn10@...> wrote:
> 
> 
> There's no "midi dump receive" command on the Poly 800, you have to 
send the command from the computer. 
> 
> 
> 
> 
> To: vintagesynthrepair@yahoogroups.com
> From: freqspec@...
> Date: Tue, 28 Oct 2008 06:53:42 +0000
> 
> Subject: Re: [vintagesynthrepair] Re: poly800 mk2
> 
> 
> 
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> 
> 
> 
> I only have a german manual. does anyone have a manual for the mk2 
in english? wink wink.
> Fran, how do you put it in sysex receive mode my friend. Ive got 
the other end hooked up to my mac 
> and i can just dump the sysex file from logic, Im just unsure how 
to put the mk2 into the right mode.
> Thanks all
> 
> 
> On Mon, Oct 27, 2008 at 11:19 PM, narfman96 <narfman96@...> wrote:
> 
> The Poly-800 II I have does the same thing when it loses it's
> patches. The battery will only hold them for so long. The good thing
> about the Mk2 is you can reload it with a sysex file. The first 
Poly-
> 
> 800's weren't so blessed. If it still won't play right after that 
let
> me know. My Mk2 has a pot for the noise that will crank it whenever
> it is needed. I also have the Mk2 Service Manual around here
> somewhere in this mess.....
> 
> 
> Fran
> 
> --- In vintagesynthrepair@yahoogroups.com, francois <babouche369@>
> wrote:
> 
> >
> >
> > I had a Poly800 (first model) one time. And I remember having
> screwed it up by uploading a sysex form my DX7 (an accident while
> digging into DX7 menus); this tells how MIDI implementation was
> 
> buggy. All the patches were gone, and it was only able to do a white
> noise, no matter which patch was selected. If memory serves, I have
> to issue a hard reset before being able to program any patch. Might
> worse a try.
> 
> > If this doesn't work, welcome into synth bug tracking ...
> > Same noise on headphone and line out ouputs?
> > Francois
> >
> >
> >
> > To: vintagesynthrepair@: freqspec@: Sun, 26 Oct 2008 23:26:40
> 
> +0000Subject: [vintagesynthrepair] poly800 mk2
> 
> >
> >
> >
> >
> > I have just purchased a broken poly 800 and all it does is play
> whitenoise. Anyone have any idea of what might need replacing.I am
> 
> going to change the battery and then send sysex of original
> patchesbut im guessing theres more to it than that.Maybe one of the
> chips?ThanksMark
> >
> >
> >
> >
> >
> > _________________________________________________________________
> 
> 
> >
> 
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> 
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Thanks Fran. I hope your week works out. Also thanks for your detailed description ... Thanks Fran. I hope your week works out. Also thanks for your

> > I only have a german manual. does anyone have a manual for the mk2 in
> > english? wink wink.

I have put the manual on my downloads page at
www.paintingwithsound.co.nz. I you could spare a $5 donation in return
it would be a help to keep me going in these troubled times.

cheers

Hi,the manual you have is for service, not user manual. Thanks anyways