[sdiy] sem repair

[cyborgzero at comcast.net]

yes, definitely caps of some variety..

I have seen things screw up a synth that defied logic.. But, 9/10,
there is a cap out there dragging down a rail somewhere. ;)

Rob

----- Original Message -----
From: "Gene Stopp" <gene at ixiacom.com>
To: "synth DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Friday, July 19, 2002 5:50 PM
Subject: RE: [sdiy] sem repair


> Tantalum caps?
>
> Best Regards,
>
> - Gene
>
>
> -----Original Message-----
> From: mark verbos [mailto:a0284520 at addcom.de]
> Sent: Friday, July 19, 2002 2:42 PM
> To: synth DIY
> Subject: [sdiy] sem repair
>
>
> Hi,
>
> I am fixing an Oberheim SEM and need some guidance. The owner tried
to
> trim the V/Oct response and sharted something that caused the power
> supply to blow up. I have replaced the 723 and got the power working
> again, with the VCO's cut off from the power. However, when they are
> connected, the positive rail drops from 15 volts down to 8 volts. I
> can't check what's wrong with the VCO's if the power isn't working?
What
> could cause this? I have never seen a dead OP amp mess with the
power
> rail. could it? Anyone know this problem?
>
> please help!
>
> mark