If you have to remove the flux from cracks or holes, you can use dental picks. Once you have removed the flux, use a cotton swab to dry the area. It all comes down to the type of tool and technique that you choose to remove the solder. Some tools require more skill than others. Besides, some techniques will damage the PCB and the components. So, you should also consider whether you would reuse the components or not while choosing the desoldering technique.
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Your email address will not be published. How To Remove Solder. March 25, By Ashwak. Below is a complete list of different desoldering techniques you can use to remove the solder, A. Removing Solder from Circuit Boards There are different methods to remove the solder from circuit boards.
Below are the different techniques for desoldering circuit boards, 1. Grinding and Scraping These are the most basic desoldering techniques. Machining and Milling If you want to use a milling machine to drill away the solder, then you have to attach a microscope to the machine to increase the precision. Chemical Stripping In this technique, you have to apply a chemical solvent on the board using a brush or swab. Micro blasting If you want to remove solder from a large surface area, then desoldering is the best option.
Removing Solder from Circuit Board Holes You can not use the same techniques you used for desoldering circuit boards to remove solder from circuit board holes. Here are the different methods to remove solder from circuit board holes, 1.
Desoldering Pump or Bulb Also known as solder suckers, desoldering pumps are the most popular tools to remove solder from circuit board holes. Drill The other option to remove the solder from circuit board holes is by using a drill or pin vise. Instead of a steel bit, you can also use bits made of carbon or cobalt. Desoldering Wick Also known as desoldering braid, this is another popular tool to remove solder from circuit board holes.
Combining the Methods Instead of using a single method, you can also combine multiple methods to remove the solder. There are also some models that are dedicated to desoldering. Removing Old Solder While removing new solder is easy, the same can not be said for old solder. You can use any one of the above-mentioned techniques to remove the old solder. Removing Solder Flux Flux is used to prepare the metal surface for soldering by cleaning and removing the impurities on it.
If the flux has become very hard, then you can use compressed air as well. Its simpler design makes this type of desoldering iron much more affordable, so it's a favorite with hobbyists and other less-frequent desolderers. As for the process? It's easy — much like the steps in the section above…. Desoldering braid, also known as solder wick , is a cord-like product that's woven out of very fine copper wires, and uses capillary action to wick away molten solder during the desoldering process.
Solder wick comes on a spool, and while it's slower at removing solder than the typical solder pump, it's also very effective. Need help? Sign In. Brands Hellermann Tyton Signamax Inc.
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Cable Sleeving. Cable Raceway. Computer Workstations. Pop-Up Desk Outlets. Desk Cable Management. Label Printers. Several additional tools are available for specialized tasks, or for contexts where it's worth paying for speed and precision. To desolder using a desoldering pump, clean the component's terminals with isopropyl alcohol.
Next, attach a metal alligator clip between the component and terminal, then heat up your soldering iron. Hold the soldering iron in one hand and the desoldering pump in the other. Melt the old solder with your iron, then vacuum up the melted solder by pressing the end of the pump down until it clicks, touching the tip to the solder, and pushing the button on the side of the pump.
For tips on desoldering with a desoldering braid, read on! Did this summary help you? Yes No. Log in Social login does not work in incognito and private browsers. Please log in with your username or email to continue. No account yet? Create an account. Edit this Article. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. Cookie Settings. Learn why people trust wikiHow. Download Article Explore this Article methods.
Tips and Warnings. Things You'll Need. Related Articles. Article Summary. Method 1. Locate the terminals for the component to be removed. A desoldering pump, also called a solder sucker, vacuums up melted solder to separate soldered components from a circuit board. Thoroughly examine both sides of the board to isolate the specific spots holding each component in place.
The desoldering pump works best for through-hole connections. You can use it on surface-mounted devices as well, but it is less effective. You can easily ruin a circuit board by accidentally separating the board layers during the desoldering process.
Ensure that you only desolder the exact pins you need to remove a faulty component. Clean the terminals. Using isopropyl alcohol on a toothbrush, gently clean the terminals of the component s to be removed.
Ensure that you clean only the terminals on the soldered side of the board and not anything on the component side. Attach a heat sink. The heat from the soldering iron can damage sensitive components such as integrated circuits or transistors. To dissipate some of the heat, clip a metal alligator clip between the component and the terminal you plan to desolder.
Clean your soldering iron as it heats. Turn your soldering iron on and let it heat up for about three minutes. Using a wet sponge make quick passes from base to tip over your soldering iron to clean it. You may see a tiny bit of smoke as you pass the sponge, but it's just from the moisture in the sponge.
Push down on the desoldering pump. Press the end of the pump until it clicks into place. This compresses a spring, and latches it in the depressed position.
Heat the old solder with your soldering iron. Using the tip of your soldering iron, heat the old solder until it melts. You can push the terminal with the soldering iron tip at the same time to help free the component as the old solder melts. Use an old soldering iron if you have one, since pushing with the iron can wear the iron down.
Vacuum up the melted solder. Touch the tip of the desoldering pump to the solder pad and melted solder, without applying pressure. This creates a vacuum which pulls the melted solder up into the pump. Most pumps either have replaceable tips or are cheap to begin with, but you can try to reduce the damage by pausing for a moment after melting the solder. Melted solder can harden again quickly. Work with only one terminal at a time.
For the greatest efficiency, hold the soldering iron in one hand and keep the desoldering pump ready in the other. Empty the desoldering pump into the trash. After each use, push the pump down again over a trash can to re-arm it and to clear out the solder. If you leave the old solder inside, it can leak back out as you go to vacuum the next terminal.
Troubleshoot difficult connections. It often takes multiple passes with the soldering iron and pump before the component is free. If you're not making progress after a few tries, try any or all of these adjustments: Apply flux first to help the melted solder flow. Melt a little new solder to mix in with the old, hardened solder.
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