> The USB port scheme is this like:
> pow. dy-dy+GND
> 4 6 8 NC
> 2 . . . . .10
> 1 . . . . nopin9
> 3 5 7
> pow dx-dx+GND
> On the other hand i have for individual pins from USB-Audio panel
> 1.) port- 2.) port+ 3.) + and 4.) - pins.
> How to connect this four pins on USB port. ???
When I'm not sure, I use a multimeter set to "ohms", to buzz out the
wiring harness. One probe of the multimeter, goes to a contact within
the external USB connector shell, while the other probe touches the wire
harness inside the computer (inside the black square plastic shell, to get
to the contact). The meter "beeps" when it finds the pin that matches
with the one I'm touching on the outside of the case.
This requires fitting "needles" on the end of the multimeter. I mean, these
probes are close to doing the job, but I fitted actual needles, so I could get
inside tight spaces (without having to puncture the wire insulation). http://www.stanleysupplyservices.com...01_s500_p1.jpg
Sure, "+" could be VCC or +5V.
And "-" could be GND or signal ground.
But the multimeter allows me to be absolutely safe.
If you reversed the (+) and (-) for example, your iPod could be
damaged. Better to leave the front panel disconnected, than to risk it
if you aren't sure. In fact, on my current computer case, the front
ones aren't wired up.