Oli Glaser wrote:
> On 16/12/2010 21:12, Nathan Nottingham wrote:
>  =20
>> I can't offer as much as others in contributing to the list, but hopeful=
ly I can brighten someone's day with my (self-inflicted) misery...
>>
>> My day has gone something like this:
>>
>> 1.) Removed a ~1000 ball (0.6mm) BGA GPU
>> 2.) Cleaned old solder off board and chip
>> 3.) Used a stencil to replace lead-free solder with leaded solder
>> 4.) Aligned BGA back into place and started to heat gun it
>> 6.) Decided it could use more flux so reached for the nearest syringe
>> 7.) Injected a bunch of Chipquik SMD 291AX solder paste between the chip=
 and the board
>>
>>    =20
>>> From now on, I'm storing the solder paste very far from my flux.  :)
>>>      =20
>> - Nate
>>    =20
>
> Ouch! I understand how that could be a tad depressing.. :-)
> It's so easy to make silly mistakes when reworking or populating boards=20
> though, especially if you're a bit tired - I managed to put a SMD=20
> tantalum the wrong way round the other day, fired the board up and=20
> couldn't work out why nothing was working, even got the hot air gun and=20
> removed a PIC and a few other components, before working out what it=20
> was. Sorted it out, then did exactly the same thing again later on with=20
> another one on the same board.. :-)
> All good fun..
>  =20
Hmm, my experiance when screwing up with tantalums (e.g. putting them in=20
backwards or overheating them during installation) is that you know=20
about it from the bang and in some cases, fireworks display and then the=20
massive stink left afterwards.
--=20
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