ATX Power Supply Help

[nino]

Does anyone know where I could get some information on ATX schematics. My power supply just died and I can't seem to locate where the problem is. Any information and help is greatly appreciated.
Thanks,
Nino

 

[Usul]

Sure id dead?
Try to ground the green wire of the ATX connector.

 

[Broadkipa]

If you want I could e-mail you a PDF file which has all the info you could ever need on ATX power supplys. It has all the voltages,pin outs etc. Also as said in the last reply, you need to connect pin 14 (green) to pin 15,16 or 17 (black) with a jumper wire with the cabel disconnected from the motherboard. when you switch the power on the power supply fan should come on. if it dosn't then the power supply is almost certanly at fault.

 

[nino]

Hey Broadkipa,
Yeah, send me the file. It is nino@purdue.edu.
The powersupply is definitely dead but I'm trying to get it working again by troubleshooting the components.
Thanks again.

 

[Broadkipa]

I have sent you the PDF file, I think you will find it usfull but it dosn't show the inner workings of the power supply. What it does show are all the voltages on the different rails and what amps etc you should expect. I dont think it is worth opening up the power supply if is dead. They don't cost that much to buy. I have just replaced a dead power supply with one made by Enermax and it a far better unit than the one I took out.

 

[BT7990]

Be VERY careful if you try and fix it. The capacitors have been known to "make themselves known". IMHO, its not worth the time or effort. Replace it with an Enermax....

 

[HotWire]

How about a Sparkle P.S.?

 

[Mark R]

You really don't want to try and fix a PSU. It's difficult, and if one part has failed the chances are that it will have degraded some others in the process.

Also don't forget that the resevoir capacitors are charged to nearly 350 V during operation, if a transistor has gone open circuit - these won't discharge when the PSU is unplugged from the mains supply.

A new PSU is cheap - and while attempting to fix a PSU might be educational, I can think of safer ways to gain fault-finding experience.