Firstly, sorry if this has been answered - I did have a look around but I can't find an existing thread or at least one that worked
Its a simple converted ATX power supply (Model No. FSP145-61GN)
When I try to power it on it quickly turns off again (I would assume the protection circuitry is kicking in)
It's been constructed as per
this tutorial only all the wires coming out the PSU go into an ABS case (containing all the circuitry and terminals) mounted on the outside of the PSU
The wires are as follows:
13x GND == BLACK
3x 3.3V == 12.0A: ORANGE*
7x +5V == 180A: RED
4x +12V == 4.2A: YELLOW
Brown == Sense wire? (bound to the thinnest of the orange wires)
Grey == Power Good Signal
Purple == +5V 0.8A StandBy
Green == Unknown (assumed soft-power on)
White == -5V 0.3A
Blue == -12V 0.5A
Green is tied to ground via a switch (as per the tutorial
Purple and Grey are tied to ground via LEDs and 330 Ohm resistors (for power good and mains voltage signals)
When plugged in 5V standby voltage (purple) line is live: and if turned on (via the switch) the fan starts for a second and then stops again (the other wires jump to their proper voltages for a second and then go dead again) - so I'm assuming the protection circuitry is kicking in for whatever reason.
I have a 10 Ohm load (its not 10W though: which may be the problem) and a 12V fan connected to the 5V lines (red).
Any ideas? Am I just doing something daft? Maybe I'm not wasting enough power to start the powersupply (it is a switchmode PSU)?
sorry to bother you all