SE k310i USB wire

Hello.
I need some quick information, and I think someone here should be able to help me.

I need to perform a USB connector repair, and all I need to know is...

Inside the charger you have 4 wires:

RED,BLUE,BLACK and WHITE.

which is ground, which is charge in, are which are the 2 data wires?

I need to re-solder them.

Ive fixed it before - but then only 1, or 2 wires were disconnected (a simple matter of re-soldering them)
But now, they're all disconnected and I cant remember what pins which should go to!

So the above information, would give me the answer

(used in conjunction with this :Sony Ericsson K310, K510, K610, K750, K800, M600, P990, W300, W550, W700, W710, W800, W810, W850, W900, W950, V630, Z520, Z530, Z550, Z710 cell phones (new SonyEricsson Fast Port) pinout and wiring @ pinouts.ru )

Thanks much.

Advisory repair cell phone, I understand the software, but do not know how the hardware

Hope that this link help you
Sony Ericsson K310, K510, K610, K750, K800, M600, P990, W300, W550, W700, W710, W800, W810, W850, W900, W950, V630, Z520, Z530, Z550, Z710 cell phones (new SonyEricsson Fast Port) pinout and wiring @ pinouts.ru

Hello again.
I've already examined that page - thanks for the link anyway.
I was really desperate for a charger. And so though I wanted a USB cable (for data exchange), I decided to simply find an alternate transformer (adapter) and add it to the respective pinouts on this cord.

So - I've got something going.
Prob now is, after a while I get the error "charging error, stop charging now".

Voltage/current is too low I deduced.
My new question :D :
whats the correct voltage/current output of a SE ORIGINAL (not fast travel) charger?