OBERHEIM SYNTH

at the other end of that wire harness there's probably a confused or dac or cv input point to the cpu.

not familiar enough to say for sure.  definitely reseat the connectors and clean them too at the main board end.

my ob8 has all kinds of funky quirks that are due to the board connectors inside being old.


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On Friday, November 8, 2013 8:08 AM, FL_799 <fl_799@...> wrote:
 
  
Having an odd issue with my OBX-a's pitch bend. When wide pitch selected, the voices seem to get wobbly and some voices fail, a tap on the paddle induces pitch instability. It's also not returning to pitch and is about a 1/2 step off. The center position on the wide setting seems to be very sensitive even after cleaning the pot. Narrow is perfect, no issues and no hint of instability.

Didn't dig in too deep. Just cracked open the J type 10K pot and cleaned it up (DeOxit) and re-soldered all connections on the pitch bend pot. No improvement on the wide setting. I have a NOS J type pot on order as a start.

Is there anything else in the pitch bend circuit that I should look at in addition to replacing the pot. I'll be getting into this over the weekend but I figured somebody might have seen this in the past.

James