Wanted 2007-2012 Orange OR50 Wiring Schematic or Service Manual

[L_O_H_WNC]

I bought a UK made, and owned OR50. I asked the owner if it had the voltage selector for US voltages and he said yes. Turns out the voltage selector only selects between 240v and 250v. I'm hoping if there is a schematic or a service manual I can determine if it is possible to run it off of 110v/120v US home power. I have several 240v outlets but they are for my welders. So I can use the head but I wanted to use it with regular 110/120v

Thanks very much !