Positive voltage regulator

[reypina]

I built 2 C84's. One is fine, but the other has a voltage of 27.6VDC at U1 pin 8, and the positive voltage regulator doesn't seem to change the voltage either way. The negative voltage at U1 pin 4 is fine, I put it at -18VDC. As far as I can tell, everything is installed correctly, and both C84's work (pass signal). Is the (R64) 1K Bourns Potentiometer not working?

Also, there was a 20K resistor left over from each kit. Is this ok, am I missing something?
Thanks for the help.

Rey

[tpryan]

You're sure D14 is installed the right way round?