Vintage Synth Repair

Thank you very much for this. Very inspiring.
Yes, I have done almost everything it says in the post.


Terje




Den 20. juni. 2016 kl. 00.24 skrev Cosmic Fugue cosmicfugue@...
[vintagesynthrepair]:


>
> have you taken a look here: https://www.gearslutz.com/board/electronic-music-instruments-electronic-music-production/721112-oberheim-ob8-how-make-survive-next-10-more-years.html
>
> have you tried to inspect for possible pcb leaks
>
>
>
>
> From: mailto:vintagesynthrepair@yahoogroups.com
> Sent: Saturday, June 18, 2016 8:41 AM
> To: vintagesynthrepair@yahoogroups.com
> Subject: [vintagesynthrepair] Oberheim OB-8 with no hope?
>
>
> Dear all,
>
> Here in Norway we have an Oberheim OB-8 that several people
> including me had been trying to make work, without any progress.
> Power supply upgraded (new power regulators, new caps), all of the
> old CMOS chip replaced, new EPROMs, a lot of the opamps and stuff
> replaced, caps replaced, cables, connectors and voice-cards checked
> (all analog voices seem to work), but no matter what - it does not
> operate properly at all. It boots, LEDs light up, and there is some
> random response from the keyboard, but there is no proper control of
> anything, and the sounds coming out as result of various boots range
> from analog noise, highpitched digital noises, various uncontrolled
> lowpitched growls from the analog voices and the like. I was able to
> get some control in the end, like turning analog noise on and off,
> haveing the envelopes response somewhat (timevise), and a little bit
> of filter cutoff and resonance responds (those time the analog
> voices came on). Obviously, all check-points, calibration, digital
> lines and voltages have been controlled many times, and are all
> perfect, but still no go for this instrument. To me it seems that
> the digital system of this machine is completely busted.
> Interesting enough, I have noticed that some vintage service shops
> (even in the USA) have announced that they no longer service OB-8,
> only all other Oberheims.
>
> So: any feedback or response regarding this are appreciated.
> - Should we just give up and sell this as a parts machine
> (everything physically is 100% intact)?
> - Should we announce this as a really challenging repair object for
> sale?
> - Or are there anyone out there who is willing to and have the deep
> knowledge to service this instrument?
>
>
>
> Terje Winther
> terje.winther@...
> http://wintherstormer.no/
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Terje Winther
terje.winther@...
http://wintherstormer.no/