Quote:
Originally Posted by Fadoksi
I have a motherboard with a few bad capacitors.
|
This already makes me a bit worried; when you say they are bad, How do you know and how did this come about?
If the capacitors have visible leaks, make sure that you have cleaned up any electrolyte that has leaked onto the board.
And electrolytics normally only leak when they are pretty old, or have been abused (ripple current too high, temperature too high or reverse connected). So, what happened?
Quote:
They are 3300uF 6.3V...I have 2200uF capacitors at home. Now I'm asking if I can replace the 3300uF capacitors with those 2200uF capacitors. Are they big enough? I have only general knowledge of electronics
|
Well, you can. Just don't have high expectations of it working.I suspect capacitors of this size are in the power supply and if they are in the output of a switched mode power supply, ESR and ESL are as important as value. So, in an ideal world, you'd look up the ESR and ESL and ensure that you get capacitors that were similar to the originals. As you might have difficulty getting matching components, I suspect you'll be forced into trying something, which may or may not work. And they may or may not have a long life if they do, either for the same reason that the originals died, or because the ripple rating is inadequate.
Oh and watch out for the form factor; you wouldn't want to replace a radial capacitor with an axial one and have to use long, sprawling leads to connect to the board.
So, it might not be worth it.
Good luck.
Oh, and
Quote:
I presume they are elecdtrolytics
|
They will be, at that value. Non-polar caps run out into the low tens of microfarads.