[sdiy] sem repair

[Gene Stopp]

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