[time-nuts] I love the smell of tantalum in the morning

[jimlux]

On 11/5/16 12:12 PM, Tom Van Baak wrote:
> See C13 in the attached photo. I need to replace some blown caps on a few boards [1]. In one instance the cap got so hot it melted itself off the board. Quiet convenient, actually -- it acts like its own fuse -- but I don't think the 5071 designers had that clever feature in mind.
>
> Having not done SMT before, how should I do it with minimal risk to the very precious PCB. Or, what equipment should I use this as a good excuse to buy?
>

Suitable hot tweezers would do this just fine, for both the removal and 
the replacement.

this kind of thing
http://www.weller-toolsus.com/weller-t0051317199-wta-50-tweezers-smd-desoldering.html
https://www.amazon.com/WMRT-Desoldering-Tweezers-Soldering-Stations/dp/B000UMMUII

It's what I've used at work, with a wx2021
Here's the complete set:
http://www.weller-toolsus.com/soldering/systems/weller-wx2021-solder-stat-wxmpms-wxmtms-wdh51-wdh60-120v.html

The tips heat basically instantly. It makes it easy to remove/replace 
even tiny stuff, although 0402 is just too small for me.

You need a good magnifier or stereo microscope, and some orange sticks 
to hold things in place while you solder, etc.


However, I've been given to understand that there is another superior 
brand (on this list.. )



> Thanks,
> /tvb
>
> [0] http://www.imdb.com/title/tt0078788/quotes
> [1] http://leapsecond.com/museum/hp5071a/A1-mother.htm
>
>
>
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