Timeline for Desolder two PCBs soldered together
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
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| Jan 24, 2018 at 12:40 | comment | added | Dmitry Grigoryev | I use a flat piece from the side of a tin can to do this, it's usually thinner than a scalpel blade and not as dangerous. And yes, the braid does help a lot when you cannot heat up all pins at once. Having extra solder will further reduce the temperature you can achieve. | |
| Jan 23, 2018 at 20:16 | comment | added | Fredled | Using a solder whick braid takes an eternity. + If you do as on the picture, you will burn your fingers in few seconds. This method is also useless in the context of the original question. | |
| Jan 23, 2018 at 19:47 | comment | added | Trevor_G | @Leroy105 :) Done it as a last resort thing on a heavily planed board that was a beatch to solder... with a very large iron tip. | |
| Jan 23, 2018 at 19:44 | comment | added | Leroy105 | Alternative 2: I've never had the guts to try it. I feel like the first few times at the rodeo, there might be some swear words in the office, as I rip half off the pads of my PCB to get that darn IC off. ;) | |
| Jan 23, 2018 at 19:37 | comment | added | Leroy105 | My two cents. Why risk having the excess at all, when the alternative is a few minutes of time with solder braid...? Especially considering the cost of pretty much any board. Ounce of prevention, pound of cure. | |
| Jan 23, 2018 at 19:33 | history | edited | Trevor_G | CC BY-SA 3.0 |
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| Jan 23, 2018 at 19:32 | comment | added | Trevor_G | @ChrisStratton not arguing, that's just the way I have always done it. Having edited his question though, the internal pad adds a wrinkle. | |
| Jan 23, 2018 at 19:23 | comment | added | Chris Stratton | No, the braid is just going to be a waste of time and effort at best and can potentially make a mess. Under the temperature conditions where that can safely be removed, the amount of solder on the pads just doesn't matter at all. The shim isn't really for prying (that would lift pads) but just to make sure there's a prepared way to lift the module once the solder is melted - and in the alternate case where the module needs to be preserved, to do so gently enough to not dislodge internal components sitting on solder that is likely also melted. | |
| Jan 23, 2018 at 19:22 | comment | added | Trevor_G | @ChrisStratton yes, as I said, you need a pry-bar wedge too. The braid just gets them initially "Dry" enough for the wedge to do it's thing. | |
| Jan 23, 2018 at 19:18 | comment | added | Chris Stratton | Solder braid is unlikely to make any difference for this before the hot air, as the only way that is coming off without lifting pads is to get the whole thing up to soldering temperature at the same time. But braid would indeed be useful for cleaning up the pads afterwards. | |
| Jan 23, 2018 at 19:13 | history | edited | Trevor_G | CC BY-SA 3.0 |
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| Jan 23, 2018 at 19:08 | history | answered | Trevor_G | CC BY-SA 3.0 |