So I plugged the power supply into the wrong jack on the back on my Raven Labs PHA-1 headphone amp. Now there is no right output. I think one or more of the op amps is toast but the surface has been scratched off all 4 in the unit so I can't identify the devices. I think there are 2 dual and 2 singles but I don't really want to guess. I searched high and low on the web for a schematic but came up with nothing. Anyone have a copy?