When I was recapping a Power Supply board, I noticed that some capacitors, it sits tight that you can't even move it and then there are some capacitors that has it's leads extended as each lead goes on the side of the IC it sits on top of but some of the capacitors when soldered to the board without any gaps seems to be slightly loose as you can push it a little even though it'll return to the original position, would that pose a problem or could it just be the leads are more flexible?
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Re: IS it okay for caps to slightly wiggle?
Actually being a little loose is probably a good thing - should mean less stress on the legs I guess. In any case it won't matter either way, assuming the leads are short (eg: capacitor NOT flapping around in the breeze) and they are soldered correctly.
As for capacitors mounted over the top of an IC? It depends how it was done. Kept short, possibly insulated with heatshrink if needed and soldered sensibly there should be no issue. Did it come like that from the factory? That sort of thing is not typical, though.
Of course if there's anything specific, post a photo of it."Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHorn -
Re: IS it okay for caps to slightly wiggle?
If they only move when you physically push them and dont move when you shake the board they should be fine, just check the solder joints and make sure that they are soldered in properly.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
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Re: IS it okay for caps to slightly wiggle?
It's a Computer PSU daughterboard so I thought the vibration might be bad if it was slightly loose, it could just be the pins are not as stiff and not the actual cap itself as that part is solid. As for the capacitors mounted on top of the IC, it came like that from the factory and I didn't haven't made it to those caps yet... C303 is what I'm referring to.Attached FilesComment
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Re: IS it okay for caps to slightly wiggle?
Won't be a problem. Heat is more likely to cause a problem (resulting in cracked joints) anyway.
Looks like a pretty old board. No wonder they have capacitors sitting over the IC. You wouldn't see that nowadays very often (if at all). I would take care if you replace those ones over the IC you don't short their leads to any IC pins.
Also not sure what kind of PSU it is, clearly this is part of a bigger system. This just looks like feedback\control or such. Unlikely to have badcaps in that area unless it's really old and\or the capacitor brands are lame."Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
-David VanHornComment
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Re: IS it okay for caps to slightly wiggle?
It's from 2000/2001 and is the daughter board that is part of a PC Power & Cooling Turbo-Cool 450ATX PSU made by Win-Tact as the OEM. You're right care must be taken to replace the ones over the IC which is why I am doing the board a section at a time as I already finished recapping the main board. The daughterboard basically consists of Teapo's with the exception of the purple one which I haven't found a replacement for yet that is a Sanyo OS-CON 25v 2.2uF Polymer. The two above the IC and the two at C309 and C310 (small black ones) are all 50v 1uF with the former being Teapo and the later being PCE-TUR even though they all have the same voltage and capacitance rating but the C309 and C310 are mini sized while the space is actually for regular sized ones like the ones above the IC, they will be replaced with Rubycon YXJ's.Comment
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Re: IS it okay for caps to slightly wiggle?
This is what it looks like after the recap, seems like one of the 2nd pin on each side of the IC is connected to the same trace as the leads of the capacitors on that same side.Attached FilesComment
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Re: IS it okay for caps to slightly wiggle?
This is the backside picture...Attached FilesComment
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Would you consider a slightly bulging capacitor defective if it measures perfectly and it is brand-new? To be honest, they are all equally like this: vent is not totally flat but they have very low E.S.R. and VLOSS is negligible.
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