That makes sense. You have a 5V 40A line (2 pins), a 12V 25A line and a 3.3V 40A line. I Googled the PS number and found a circuit diagram here from someone who made a 115Vac / 400Hz inverter out of one.
Wish we could do the same for some of our other finds!
Originally Posted by linw
OK, I think I have cracked it.
. . . . . x pwr on
x . x x x . First is short pin enable. Then 3 X gnd - use any of these
. . . . . .
. . . . . .
Grounding the short pin and the pwr on pins gets the fan roaring like a 747! It also produces blade voltages as follows:-
Blade 1 - chassis gnd
Blade 2 - +3.7V (3.3V)
Blade 3 - +12.82 (12V)
Blades 4,5,6 - gnd
Blade 7,8 - +5.48V (5V)
I still have two concerns. According to a sticker on a supply on a web site (it is not on mine) the Status LED is supposed to be steady green if all is well. Mine is not lit. There is only a green AC pwr LED.
Considering that there is only one blade for 12V, I wonder about its current capacity. There is nothing on the PSU to show what the current capability is and I couldn't find anything by googling. It is a 750W supply so it has to be capable of a lot of current from somewhere!
Anyway, some progress has been made. Next step is to test it with a load. I will report back.