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echo: tech
to: ROY J. TELLASON
from: JIM HOLSONBACK
date: 2003-10-19 20:57:00
subject: Testing ATX power supply

-=> ROY J. TELLASON wrote to JIM HOLSONBACK <=-

 RJT> But in any case,  the "5VSB" (5v standby power?) that's
supposed to be
 RJT> on pin 9 (purple wire?) should be there all the time,  right?  Or at
 RJT> least all the time that the PS switch is on,  right?

Yes, that is my understanding - it should be there as you say.

 RJT> That's not there either.

Oops!  Not a good sign.  Maybe something got shorted somewhere or caused
some power surge which blew an internal PS fuse?

Just a thought - - FWIW, while bench testing multiple CDROM drives and
trying to hot-plug in power connector to them, I've sometimes caused the
testbed ATX PS to shut itself down,  but the PS generally started
working again after a few minutes cooling down period.  The testbed has
a good-quality PS - Astec as bir.  Maybe a less expensive PS would have
blown a fuse?

- - -  JimH.


... "Bother!" said Pooh, as he saw the sparks and smelled the smoke.
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