Hi folks
I've taken out an old power supply from A Dell dimension 1550 that was smelling strange, and which I couldn't power up from my bench even after tying the green power-on signal wire to ground. It looks as if some component on it is shorting the output.
Now I'd like to have a go at repairing the thing, so does anyone know where I can get a schematic for it?
It's a Premier LC-C350ATX, but I can't even locate the company on the web
Regards,
Larry Harson
On Wednesday, September 11, 2013 5:36:09 PM UTC-4, snipped-for-privacy@softhome.net wr ote:
elling strange, and which I couldn't power up from my bench even after tyin g the green power-on signal wire to ground. It looks as if some component o n it is shorting the output.
re I can get a schematic for it?
bLarry,
Sometimes ATX supplies require a load on the +5v and sometimes the +12 too. A couple of turn signal bulbs on each should do. If its an old supply tha t has died gracefully I'd clean it up and find good replacement caps for th e outputs rated at 105c with low ESR. You could probably get them at badca ps.com, Digikey or Mouser.
You may also find more info on the sci.electronics.repair FAQ pages maintai ned by Sam Goldwasser at "
Use an isolation xfmr and be careful as there is hi-voltage in there.
Regards, al
If you dig into it, remember that some (all?) Dell mother boards have non- standard power wiring on standard plugs. Plug a 'regular' supply into a mutant Dell MOBO, or visa-versa, and you'll let the smoke out.
There's wiring diagrams on the web.
-- Tim Wescott Control system and signal processing consulting www.wescottdesign.com
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