Hi,

I'm really sorry for no answer, I just received my USB sockets today.
N900 which I bought was really lucky one. All solder pads are intact, this situation allows to make some very easy measurements and I found solder points as close to the USB socket as possible. Click miniature to make it bigger.



With that solution the only thing is waiting for pm's about N900 repairs

PS About transformer soldering iron - it's really good piece of hardware if you repair devices at customer house, like in the CRT TVs era. It's both heating up and cooling down very quickly. I was using similar one from polish company "Lutola" in my electronics school