Problem with fortron 530W after adjusting pots

[jlo56]

Fortron 530W 60GNA
after i hook this new PSU to my mobo (ATX connector and 12/5V connector only), i turn both mobo and PSU on and adjust the 3.3V and 12V, 5V via the pots.
i achieve the desired voltages (5.4V and 12.5V), turn everything off and proceed to complete building the rest of my system

after i hooked everything up, i go to power on, but once i do, the fans and lights power on FOR 1 SECOND and then everything stops. I then unplug the PSU completely from my machine and tried to turn on using a wire between POWER-ON line and a ground....the PSU fans spin for 1 second and then stops


this is the second time this Fortron 530W has done this to me....
anyone have any idea how to fix this? is it an overvoltage protection problem?

[itshondo]

I think you have raised the rails too high- you might try lowering them to like 12.05 - 12.1v & 5.05-5.1v. That's what I did with mine and it operates flawlessly. The 530 is a beefy PSU & the rails don't need to be so high, even with a big load.

[Susquehannock]

Fortron 530W 60GNA
after i hook this new PSU to my mobo (ATX connector and 12/5V connector only), i turn both mobo and PSU on and adjust the 3.3V and 12V, 5V via the pots.
i achieve the desired voltages (5.4V and 12.5V), turn everything off and proceed to complete building the rest of my system

>>>>>>>


Yeah, too high. You exceeded the ATX spec on the +5v rail @ 5.4v.
A 5% variance is all that's allowed.

+3.3v = 3.135 - 3.465
+5v = 4.750 - 5.250
+12 = 11.400 - 12.600

Why do you feel the need to adjust the PSU voltages?
Likely it would have been just fine at stock.

[larrymoencurly]

The specs I've seen for some PSUs say that the overvoltage protection doesn't kick until way higher, like 15-20%. This includes the chip used in many Fortron/Sparkle PSUs shuts off if the +3.3V exceeds +4.1V, the +5.0V @ +6.2V, and the +12.0v @ +14.2V. I've set off the overvoltage protection only once, in another brand PSU that turned out to need much higher loads than I'd been using.

Did you mark the original positions of the pots so that you could restore the settings in case something went wrong? More than once, this has been a lifesaver for me, especially when the adjustments interacted with one another.

[HousERaT]

you should only be changing two of the pots.... I believe one of the five actually changes the overvoltage (forget where I saw that). In any case check this thread out as it may have some answers for you.

http://www.ocforums.com/showthread.php?t=258903