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 Post subject: How is this for a Joke
PostPosted: Tue Apr 20, 2010 6:41 pm 
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Joined: Sun Apr 11, 2010 6:05 pm
Posts: 8
Location: New York
Don't You Know even after posting where the voltage regulators go on the PCB, do you know that upon checking my work I realized I soldered them in the WRONG place!!! UGGGGHHHHHHHH :x Is it possible to remove them without damaging the component. PLEASE HELP!!!!! the heatsink really gets hot when you apply the iron to it. :oops:


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 Post subject: How to desolder
PostPosted: Wed Apr 21, 2010 11:27 am 
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Joined: Mon Jun 25, 2007 6:09 pm
Posts: 1261
Location: Music City
Mistakes happen. I've done the same thing, hahaha so don't feel bad.

To get the 317/337 out and soldered into the right locations, you need to desolder them.

The easiest way to do this is with a desoldering gun. (i.e. sucks out the solder cleanly.)

The manual desolder pump will not work (at least I have no success with that thing. ) It's only good for NON-PLATED holes and large holes. For double-sided plated through holes PCB, they're weak and useless.

The other way is to heat all 3 pins of the component at the same time and pull it off. But you need a special solder tip for that.

The other way is heat the PCB solder location with a hot air gun and pull the component out... but burned/damage PCB can result if you heat it too much.

All the above techniques rely on some special equipment or tools. Something you may not have.

---

If you don't have these tools, my suggestion is to "SACRIFICE" the component to avoid damaging the PCB. The cons is you have get replacement parts. But it's better to replace the part than damage and replace the PCB.

i.e. cut the leads of the parts that you inserted wrong (leave enough length that you can grab with a tweezer/long nose pliers. Heat the joint until the solder melt and pull out the cut lead.
*** you may still have a problem getting stuck solder in the hole out. If you don't have a desolder pump, you can use small PCB Drill bits to drill out the solder lead and punch a hole through.

- Really, the cleanest/safest way to do this is with the desoldering gun. You can remove the part and re-use it without doing any damage to the PCB.

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