computer psu

hacknet · 26th December 2002, 01:55 PM

how do you start a ATX com psu?

i have tried shorting the pwrON to gnd while pwrOK is shorted to 5v....

what else do i have to do?

SkinnyBoy · 26th December 2002, 11:41 PM

you don't connect power ok/power good to anything... you should just be able to connect the power on (Green, pin 14) to ground... if that doesn't work, try connecting a load to teh powersupply as well, such as an old harddrive..

AudioFreak · 27th December 2002, 01:00 AM

1) Power_good is just a monitoring signal normally used by the motherboard to ensure the quality of the power, leave it disconnected.

2) Always provide a load on the +5V line testing without one can destroy the psu in a very short period of time. A small load on +12V is also a very good idea.

3) Short power_on to ground.

hacknet · 27th December 2002, 01:27 AM

the voltage shoots up to 13.39v be4 dropping to 0.2v... and reason for this?

SkinnyBoy · 27th December 2002, 04:23 AM

Umm..... what voltages??

hacknet · 27th December 2002, 05:02 PM

Quote:

Originally posted by SkinnyBoy
Umm..... what voltages??

this is for the 12v rails...

SkinnyBoy · 27th December 2002, 10:10 PM

Well, have you tried the powersupply with a load on it??

Circlotron · 27th December 2002, 10:21 PM

Quote:

Originally posted by hacknet
the voltage shoots up to 13.39v be4 dropping to 0.2v... and reason for this?

Probably shutting down on overvoltage because there is no load. PC supplies being what they are, have only the least amount of parts to function so sometimes they will act strangely without a load. Definitely use a small load on each rail.

SkinnyBoy · 27th December 2002, 10:25 PM

Quote:

Originally posted by Circlotron

Probably shutting down on overvoltage because there is no load. PC supplies being what they are, have only the least amount of parts to function so sometimes they will act strangely without a load. Definitely use a small load on each rail.

Are you just repeating everything I say???

Circlotron · 28th December 2002, 12:06 AM

Quote:

Originally posted by SkinnyBoy

Are you just repeating everything I say???

I never say anything unless you have authenticated it by saying it first. You are my guiding light.

26th December 2002, 01:55 PM	#1
hacknet diyAudio Member Join Date: Nov 2002 Location: sg	computer psu how do you start a ATX com psu? i have tried shorting the pwrON to gnd while pwrOK is shorted to 5v.... what else do i have to do?

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26th December 2002, 11:41 PM	#2
SkinnyBoy Banned Join Date: Nov 2002 Location: Adelaide, Australia	you don't connect power ok/power good to anything... you should just be able to connect the power on (Green, pin 14) to ground... if that doesn't work, try connecting a load to teh powersupply as well, such as an old harddrive..

27th December 2002, 01:00 AM	#3
AudioFreak Warp Engineer On Holiday Join Date: Oct 2001 Location: Queensland, Australia	1) Power_good is just a monitoring signal normally used by the motherboard to ensure the quality of the power, leave it disconnected. 2) Always provide a load on the +5V line testing without one can destroy the psu in a very short period of time. A small load on +12V is also a very good idea. 3) Short power_on to ground.

27th December 2002, 01:27 AM	#4
hacknet diyAudio Member Join Date: Nov 2002 Location: sg	the voltage shoots up to 13.39v be4 dropping to 0.2v... and reason for this?

27th December 2002, 04:23 AM	#5
SkinnyBoy Banned Join Date: Nov 2002 Location: Adelaide, Australia	Umm..... what voltages??

27th December 2002, 10:10 PM	#7
SkinnyBoy Banned Join Date: Nov 2002 Location: Adelaide, Australia	Well, have you tried the powersupply with a load on it??

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