[sdiy] Oberheim OB-X repair help

[ChristianH]

Hi Maarten,

years ago, I scanned the 2nd edition:
  http://www.chrismusic.de/synth/schematics/ob-x/ob-x.zip
  http://www.chrismusic.de/synth/schematics/ob-x/ob-x_pcb.zip

OB-X.zip     is the service manual & schematics (b&w TIFs)
OB-X_PCB.zip is the PCB artwork (grey scale TIFs)

Apparently these documents have been xeroxed a couple of times, so it's no top quality.
In order to keep file sizes reasonable, I have set the scan resolution just high enough to still 
show everything that is readable in the paper documents (I know that e.g. the pin numbers in the 
schematics are a bit fuzzy, but increasing the resolution doesn't help here).
If there _is_ something not readable due to the resolution, feel free to ask for a better scan.

tot ziens
Chris



On Wed, 21 Dec 2011 11:02:45 +0100 "Maarten Halmans" <diy at artefacts.nl>
wrote:

> Hello,
> 
> I am repairing a Oberheim OB-X, it is an early 4-voice and there is problem 
> with 2 of the Eproms. I found the data for the newer version online but I 
> really need the early version because some hardware changes where made. Does 
> anybody have the bin or hex files for them or knows where to get them, so I 
> can burn some new ones.?
> I am also looking for the second edition of the service manual, I can only 
> find the first edition online.  Maybe I can get the newer software to work 
> when I do some hardware changes. I already tried the newer software, a lot 
> of stuff is working properly but the LED's on the fronpanel are not selected 
> and updated.
> 
> 
> Thanks in advance,
> 
> Maarten 
> 
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