Harrison Labs 6207A DC power supply
 

I found this unit at the local landfill and it has an output, however
the panel meter which doubles as a voltage or current indicator
depending upon which front panel switch you push in, does not indicate
anything. Does anyone have a schematic for this power supply or do you
know by chance if anything in particular on the rear terminal strip
needs to be strapped for a on board reading? Thanks very much for any
assistance. Lenny Stein, Barlen Electronics.