Vintage Synth Repair

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
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> To: vintagesynthrepair@...: freqspec@...: Sun, 26 Oct 2008 23:26:40 
+0000Subject: [vintagesynthrepair] poly800 mk2
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> 
> 
> 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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