OBERHEIM SYNTH

To save time, bend out all 8 data bus lines, and install U164 with no data busconnections.
Then bend out all of the address too if it still is fixing the issue.If that breaks things again, bend back half of the address lines.Then try the other half.  Sort of a binary search instead of bending in and 
out pins one at a time, which could take a lot longer.
Always keep the power and gnd to this chip connected.  Also, the chip 
select pin should be connected as well.  Assuming the chip is not actuallybeing used, disconnecting address or data lines should be OK.  But not the 
power pins or the chip select/ chip enable pin.

  Bob


      From: "richtrix@... [oberheim]" <oberheim@yahoogroups.com>
 To: oberheim@yahoogroups.com 
 Sent: Thursday, March 19, 2015 6:25 PM
 Subject: Re: [oberheim] Finding Clock frequency of my OBXa