Crumar Musical Instruments User Group.

> Middle -17? -Sure- the middle pin? Normally must the left pin provide 
> the -17 volts, middle pin ground and right pin the -12 Volt. If the
7912 
> gets overheat, it will raise the output voltage. But with overheat i 
> mean "burning".....
> 
> Yup, better check the PSU first......

Yeah, I triple checked.  I'm supposed to be using the case ground,
right?  -17v  Of course this changes if I unplug the cables that
attach the PSU to the rest of the keyboard.

Would you suggest that PSU is damaged, or is something attached to the
PSU causing this problem?

Strangely enough, the keyboard partially function, can load sounds
from tape, play sounds, etc...

Thanks!