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echo: tech
to: BEN RITCHEY
from: JIM HOLSONBACK
date: 2003-09-30 00:26:00
subject: Testing ATX power sup

Hello, Ben.  I want to ask you to think a bit more about what you said
when, - -
 -=> BEN RITCHEY wrote to PAUL ROGERS <=-

 BR>  PR: > Anybody got any tricks for testing ATX power supplies, without
 BR>  PR: > trusting one with not frying a motherboard?  What's the best way
 BR>  PR: > to test a P/S?

 BR> Just load each supply line/voltage and see if it regulates. One of the
 BR> larger bulbs used for automobile running lights works great. :) You'll
 BR> have to lower the reset/standby pin to ground to start it up though.

PS_ON pin designation aside - -

A "sample" ATX 300W PS here has on its label - -
+5V Max 30 A
+3.3 V Max 14A
Max combined power on +5 and +3.3 - - 160W
+12V Max 12 A
-5V Max 0.5A
-12V Max 1.0A
+5Vsb Max 3A

So which particular automotive light bulbs would you recommend for
testing each of these? (Remembering that the pins of the ATX standard
power connector are rated for 6A Max for each pin).

 BR> Let it run overnight so it heats up real good ... then test again. If
 BR> it DOES NOT get warm, switch to a headlamp .

 BR> Be well,

Well, I think if he hooks up an automobile headlamp (or even a 12V
tail or stoplight) to some of those, his PS will no longer "be well".

- - -  JimH.

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