Author Topic: Very tricky capacitor replacement.  (Read 4793 times)

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Offline EPTech

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Re: Very tricky capacitor replacement.
« Reply #25 on: October 16, 2019, 07:29:15 pm »
Hi there,

I desolder them using a special soldering tip, a 1cm blade to heat up both pads a the same time.
Then I gently clamp the MB in a vise so it stands up vertically.
Next I put a small conical solder tip on the component side and place the desolder gun on the opposing pad. The moment the solder tip sinks into the top pad I wait about 2s long and then engage the desolder gun. I pull away the solder tip from the top pad and immediately after the desolder gun.
That should leave a nicely cleaned hole.
Also be careful. Some MB use a reverse silk print, as in, the filled half circle can be the positive instead of the negative.
Kind greetings,

Pascal.
 

Online Shock

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Re: Very tricky capacitor replacement.
« Reply #26 on: October 16, 2019, 11:28:57 pm »
Congrats so far. Practice makes perfect, collect a few scrap boards and practice removing and reinstalling components to build more skill. Then when you do it next time you'll be even more confidant.

If you make a mistake and lift a pad or cut a track/trace it's not the end of the world. But initially just aim to avoid making more work for yourself buy easing out components after proper melt through is achieved. That is where most people go wrong, by rushing or by taking far too long and taking multiple stabs at it, which often ends up in pads lifting.
Soldering/Rework: Pace ADS200, Pace MBT350
Multimeters: Fluke 189, 87V, 117, 112   >>> WANTED STUFF <<<
Oszilloskopen: Lecroy 9314, Phillips PM3065, Tektronix 2215a, 314
 


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