Re: Enermax Liberty ELT500AWT fails to turn on

Very intresting.

Today I have put eveything back in the PSU, and soldered it all back up.
And would you guess it, the dam thing is working again.

Just tested the voltages from the psu output and I get the following.

+5.0Vdc = +5.03V.
-5.0Vdc = NA.
+12.0Vdc = +12.78V.
-12.0Vdc = -12.13V.
+3.3Vdc = +3.43V.
+5.0Vsb = +5.20V.

ATX PSU voltage details taken Wiki
+5.0Vdc [+/-5%] (+4.75V to +5.25V).
-5.0Vdc [+/-10%] (-4.50V to...

Re: Enermax Liberty ELT500AWT fails to turn on

My DVM/DMM that I am using for testing is a [URL="http://www.uni-trend.com/ut58c.html"]UNI-T UT58C[/URL].

There are no shorts on any of the K2607 or IRFP460A pins.

What fuse? the main input fuse on the PSU? if so that one is fine.Re: Enermax Liberty ELT500AWT fails to turn on

My DVM/DMM that I am using for testing is a [URL="http://www.uni-trend.com/ut58c.html"]UNI-T UT58C[/URL].

There are no shorts on any of the K2607 or IRFP460A pins.

What

Re: Enermax Liberty ELT500AWT fails to turn on

R14, R15, R24 are all the same (Black, Blue, Silver, Gold, Green).

Please see attached picture as requested....

Re: Enermax Liberty ELT500AWT fails to turn on

C1 - 330uf 400v (Rubycon).
C13 - 1500uf 10v (CTC).
C14 - 1000uf 10v (JP).
C16 - 470uf 25v (JP).
C17 - 3300uf 16v (CTC).
C18 - 3300uf 16v (CTC).
C19 - 3300uf 10v (CTC).
C20 - 3300uf 10v (JP).
C21 - 3300uf 10v (CTC).
C22 - 3300uf 10v (JP).

Re: Enermax Liberty ELT500AWT fails to turn on

I live in the UK, so our mains power is 230v 50Hz.

I have also attached pictures as requested.

Can someone tell me what, R15 - (Black, Blue, Silver, Gold, Green) is ment to be, as my DMM is showing it as a dead short....

Re: Enermax Liberty ELT500AWT fails to turn on

Today I have removed the big heatsinks, for the pri and sec.

[B][I][U]Pri Side[/U][/I][/B]
Q1 - [URL="http://www.semicon.toshiba.co.jp/openb2b/docget.jsp?type=watermark&pid=2SK2750&lang=en&path=2SK%2F2SK2750_en_wm_20090929.pdf"]K2750[/URL].
D5 - [URL="http://www.irf.com/product-info/datasheets/data/30eth06.pdf"]30ETH06[/URL].
Q2 - [URL="http://www.rlocman.ru/i/File/dat/International_Rectifier/MOSFETs_Single/IRFP460APBF.pdf"]IRFP460A[/URL].
Q3 - [URL="http://www.rlocman.ru/i/File/dat/International_Rectifier/MOSFETs_Single/IRFP460APBF.pdf"]IRFP460A[/URL]....

Re: Enermax Liberty ELT500AWT fails to turn on

I did say in my 1st post that I did test the power supply on the bench, but I guess that was no very clear to if I still had the PC connected or unconnected.

So with the PSU not connected to anything bar the mains power, when you ground the green wire, the power supply makes a single click, and no other noises, and the fan does not spin.

Doing the same test on the bench again with a old spare and known working motherboard you press the power button, there is that click again, followed by a high pitch buzz/whisle...

Good day all.

This week while using my workshop computer, I had a BSOD and the computer restarted, it got into windows and the computer locked up, So I then pressed and held in the power button.

Since then I have not been able to get this PSU to turn back on again.

When the mains power is on, I get the 5volt standby fine, but you press the power button you hear a click, and then a high pitch wissle/buzzing.

The power supply in question is a Enermax Liberty ELT500AWT.

I have removed the lid/cover, and I can not see any burnt/damged...

Good Day All.

I have a XFX 630i (MG-63MI-7109) that fails to power up.

I am testing this board with good known working PSU, CPU, Memory, ect.

With eveything connected, when you press the power button eveything powers up for a split second, and the PSU led go's from green to red.

If I discount the 4pin CPU power connection, and press the power button the system fires up, but there is no post.

With eveything disconected, I used my Digital Volt Meter to test the 4pin CPU power connection, and it's a dead short. ...