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Vintage Synth Repair

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Omni-2 Power Supplies

2003-09-13 by Dave Garfield

TGIF, persons!

Just a small note re: Omni-2 power supplies, if I may.  The 
*negative* side of the supply draws more current than the positive 
side.  I believe that, in order to balance DC levels, triggering and 
whatnot, Alan R. decided to generate negative-biased waveforms.  Oh, 
they look the same as a ground-to-positive wave... but, don't be 
fooled!  These start at Minus 15 volts, and climb all the way "up" 
to ground.  

Anyway, all keeding aside, I recall reading in my Service Manual 
that the current draw for the negative supply rail is greater than 
the positive side.  Just something to remember when troubleshooting.

OK.  Thanks for the forum!  

   Omni-logically Yours,
   Dave Garfield

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