OBERHEIM SYNTH

Stephan, I don't have this instrument, and don't know it well from  
technical point of view, and don't have enough time for study of  
service documentation for you. You or your technician can do it  
directly. I speak just generally, as a collector and hobby serviceman  
who does maintenance and repairs of his numerous instruments. Besides  
the check I recommended to you, I usually change electrolytic  
(sometimes also tantalum) caps, especially in power supply circuit,  
sometimes I replace old displays with EL backlight for modern with LED  
backlight.

I can send you service manuals, please don't expect from me concrete  
advice what to do with this instrument. Maybe some owner or specialist  
who knows it will answer your questions. I fight now with my Matrix 6r  
repair...

Daniel Forro

On 27 Jun, 2014, at 11:10 PM, zap@... [oberheim] wrote:

>
>
> Hi Daniel,
> could you give me a hint where the lfo section is located ? On which  
> board do i have to look. Do you know which parts are used to create  
> the oscillation ? Is there a dedictated line to the voice cards  
> motherboards, which i might check for correct signal ?
>
> Cheers,
> Stephan

Manuals have been sent to the server, link for download is here:

http://www.uschovna.cz/en/zasilka/AEULJ9GKR98PXUSZ-S3I/

They are there until July 11th.

You will get another message the link.

All the best.

Daniel

On 27 Jun, 2014, at 11:47 PM, zap@... [oberheim] wrote:

>
>
> Hi Daniel,
> thx very much. I will try to figure out by the service manual. But  
> if someone familiar with OB-Xa could give a hint would be very  
> appriciated.
>
> Good luck with your 6r, i also have one, but it never had a problem.
>
> Cheers,
> Stephan
>