I was recently using an old 375 watt PSU as a benchtop power supply and managed to break it trying to disable the short circuit/overvoltage/undervoltage protection. Meh. Anyway, naturally I took it apart and started desoldering the components. I pulled a transformer out that was mounted to the board with screws with 3 wires coming out and being soldered to the board elsewhere. The transformer had a sticker on it that reads on 2 lines "37-C6371104 ROHS HP OK/0706 SC REV.B" I did a quick google for the hyphenated number but didn't come up with anything. It was taped up with yellow tape and under the first layer was some thin copper foil wrapped around in a single layer, under that was the coils and iron core. There are 3 wires, blue, black, and white. It looks like the blue and white wire goes to one of the coils and the black wire goes to the other, which confuses me. I'm trying to identify the rating of it and I'm nervous to just hook it up to 120VAC and use a multimeter. If anyone could help me figure it out, that'd be awesome. I can take a picture of it if that would help.
Hopefully someone can shed some light and thanks in advance!