Thanx for the info, kasar
, but, on the diagram, the pcb with the pot adjustment thing, is that a 7.5v fixed regulator?
cause im going to use a 14.8v battery, and i have to regulate the 14.8v to 7.5v for the psone screen. do i need that regulator thing in harshboy's diagram?
also the two wires from the power regulator that are attached to the battery are they the postive (red) and negitive (black) connetor that rev A/B have?
oh, you was talking about the power part, well, it still compatible, just check at the picture you posted, there are two wires wich come from the battery directly to the gamecube REV C board showed at the pic, so if you use a rev A or B gamecube, you will need to wire the battery to the regulator board, and then wire the regulator board to the gamecube.
yes, I know rev C boards are usually better for portabilizing cause you dont need to care about to the regulator board part, anyway if you wire it nice and you slim a bit the regulator board and the main MOBO everything will work fine
about how to wire the regulator board to the GC, I think this picture is all you need http://kyorune.com/modding/file.php?art=84&file=28
if you got a poor and distorsionated image after wire the regulatorboard to the mobo, try adding some extra ground wires from the regulator board to the mobo.
and finally connect the two wires from the 14.8v battery to the regulator board input (check at least twice the polarity is correct before power it on!
and yes, that pcb at Harshboy's diagram regulates 12v to 8 v (yep, 8 volts can work fine with the 7.5 input voltage the ps1 screen need :=) )