OBERHEIM SYNTH

Does the circuit board use one of the through holes of the socketed chip to make a transistion from the bottom to the top of the board for a power /gnd carrying pcb trace, maybe a power through hole is damaged/intermittent or maybe the extra loading offered by the sram on the supply is just enough to make a faulty diode or other component work properly nearby. It doesn't really make any sense that it works just by having a chip in the socket with its data and addressing lines floating even.
 


     On Saturday, 21 March 2015, 3:41, "Bob Grieb bobgrieb@... [oberheim]" <oberheim@yahoogroups.com> wrote:
   

     I agree, but that doesn't stop it from happening...

      From: "richtrix@... [oberheim]" <oberheim@yahoogroups.com>
 To: oberheim@yahoogroups.com 
 Sent: Friday, March 20, 2015 10:20 PM
 Subject: Re: [oberheim] Finding Clock frequency of my OBXa
   


Well I lifted all data pins and all address pins and it is still smooth! So now I will just play with it and see if there are any other strange bugs but with U164 neutered I am hoping there won't be any issues. Thanks for that advice Bob. I'll keep you posted. I did finally hear back from Tony Karavidas, the Midi Kit designer, and he so far has only said that this fix makes absolutely zero sense lol.


Sincerely,Rich Clarke