Ok. This is an old thread but since i know it's dificult to find right answers for this I want to give the solution so somebody can find it googleing it...
pin 1,2 = 15-19V
pin 3,4 = 3.3-5v (3 is for logic board curent and 4 is for on/off so they can be soldered together)
pin 5 = 0-3.5v (this...