How to check SMPS output with multimeter

November 2, 2009 at 07:35:39
Specs: Windows XP professional sp2

Hai guys i learnd hardware newly.at institute they didnt tell me how to measure the smps output voltages (Core: 1,Core 2,+12V,-12V,+5V,5V,+3.3) using multimeter.ex.if i want to check the vlotage of 12V in 20 pin how? and how much should b the vlaues.how to check output voltages when it is on load.when im working on sys can i check with multimeter what are vcore,5vsb?
pls help me.bcause im going to servicing.but i dnt know how to check all these.
plzzzzzzzzzzzzzzzzzzzzz

even idnt know usage of multimeter.how to set and where i put the rigs.


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#1
November 2, 2009 at 11:43:40

O.k. I give what does SMPS stand for? The only thing you really can check voltages on is the power supply and USB because they are standard. If you need to check voltages on a MoBo then you need the schematic diagram from the manufacture and in the end it is not worth it because the amount of money you would put into repair of a MoBo you can buy a new system.

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#2
November 2, 2009 at 13:39:27

SMPS = Switching Mode Power Supply. For some reason, that's what they're called in India.

I doubt you've been given any training because I'm sure they would have covered how to check voltages. All you have to do is study the diagrams & select the proper pins to use the multimeter on:

http://pinouts.ru/Power/atx_v2_pino...

http://pinouts.ru/Power/atxpower_pi...


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#3
November 2, 2009 at 21:09:38

Thanks to provide info about smps voltages.but i want to know how to check output voltages.+12,+5,+3.3,-12,-5,vcore.and how much should b the values that is my question.
can any body help?

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#4
November 3, 2009 at 07:46:48

Oh "Switching Mode Power Supply" thats funny because all computer Power Supplies are Switching so why say it? Guess that's why we just call them PSUs.

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