Teardown of a PC Power Supply

Re:Teardown of a PC Power Supply by eurekin on Sunday May 23, 2021 @03:55PM (#27257998)

I noticed some of them include a simple light, which slowly gets dimmer after disconnecting the power.

Is it to discharge that capacitors?

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Re:Teardown of a PC Power Supply by exmadscientist on Sunday May 23, 2021 @04:02PM (#27258060)

That's discharge + indication all in one. It's a great solution, elegant, effective, and one of my favorites. But you have to find the cents for the neon (usually) bulb.

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Re:Teardown of a PC Power Supply by jlgaddis on Sunday May 23, 2021 @05:11PM (#27258623)

Be careful, that's (probably) just on the DC side...

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Re:Teardown of a PC Power Supply by Scoundreller on Sunday May 23, 2021 @05:36PM (#27258806)

Isn’t the AC side connected to the wall prongs? I touch/step on those all the time after unplugging things. Or is there something isolated from both the DC side and prongs where charge could be stored up?

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Re:Teardown of a PC Power Supply by bonzini on Sunday May 23, 2021 @08:25PM (#27259909)

Those big-ass black capacitors (470 uF each) are on the AC side. They are the bit that converts 230AC to 320DC, and they might keep their charge for some time.

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Re:Teardown of a PC Power Supply by SAI_Peregrinus on Sunday May 23, 2021 @11:06PM (#27260747)

Those are after the bridge rectifier, so there's no path for current to flow back out the plug from them. That also means you can't discharge them via the plug, of course.

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Re:Teardown of a PC Power Supply by garaetjjte on Sunday May 23, 2021 @06:05PM (#27259056)

Yes, there's bridge rectifier.

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