Tenna Phase III schematic needed
 

I am in need of a schematic for a Tenna Phase III 20 amp power supply
schematic. It is supposed to be a 17 amp continuous supply at 13.8 volts.
It is outputting 24 volts no load at the terminals. Ouch! Can anyone help?
please email me at if you can find a scehmatic. I checked
various places on the web but no luck,. Thanks
Dave