Discussion about the Korg PolySix synthesizer

Hi Andy,
Thanks for your response! I am wondering if I might have fried IC 33 and 32 in the transfer from the old board. Would the D/A problems and the out of control MG circuit be related? Sorry if these questions are tedious.
Here are some macro shots I have uploaded to my photobucket acct. 
Thanks again! 
Greg


http://i960.photobucket.com/albums/ae89/jellocello/p003.jpg
http://i960.photobucket.com/albums/ae89/jellocello/p008.jpg
http://i960.photobucket.com/albums/ae89/jellocello/p010.jpg

--- In PolySix@yahoogroups.com, Andrew Jury <andy@...> wrote:
>
> Hi Greg,
> 
> You might want to have a look at the values of the components you have used
> around the D/A converter section of the board. If you like take a nice
> details Œmacro¹ shot of the board and post it where we all can see. I am
> sure some eagle eyed person will be able to spot the mistake. The reason one
> of the LEDs is stuck on 5 is that the full range of voltages are
> unattainable from the D/A converter IC33 over the entire input bit range.
> These are checked by the CPU when in test mode.
> 
> Cheers,
> Andy
> 
> 
> On 31/05/2011 23:02, "hotdogfinger25" <gregory.oconnell@...> wrote:
> 
> >  
> >  
> >  
> >    
> > 
> > Hello!
> > I recently completed one the KLM367 Clones and the MG circuit is not working
> > properly. When I  turn it on the MG speed slowly ramps up to maximum speed and
> > the level is stuck on "10" I did  all the bug fixes to no avail. The arpeggio
> > speed is normal. Also, during the calibration found in the service manual,
> > when you are supposed to make 1 and 8 light up in test mode after switching
> > the tape enable on, I can only get 1 and 5 to light up.
> > 
> > or  {2 and 5}
> > or  {3 and 5} 
> > or  {4 and 5) 
> > 
> > Has anyone else experienced this problem? Thanks! Greg
> > 
> >  
> >    
> > 
> > 
> 
> 
> 
> [Non-text portions of this message have been removed]
>