dsub connector solder type metal

Soldering iron soldering tips and steps

Soldering iron pre-soldering and welding steps (soldering iron welding method) (1) pre-soldering processing steps Before welding, the component pins or circuit board welding parts should be processed, generally have "scrape", "plating", "test" three steps: "scrape": is to do a good job of cleaning the welding area before welding. "Three steps:" Scratch ": is to do a good job before welding welding parts of the clean work. The tools generally used are a knife and fine sandpaper, the integrated circuit pins, printed circuit boards to clean up, remove the dirt on it, cleaned up after the general need to be removed components coated with flux.　　"Plating": is to scrape the net component parts on the tin. Specific practice is dipped in rosin alcohol solution coated in the scraping of the components of the welding parts, and then the hot soldering iron with tin head pressed on it, and turn the components, so that it is uniformly plated with a very thin layer of tin.　　"Measurement": that is, the use of a multimeter to detect all the tin-plated components whether the quality is reliable, if there is unreliable quality or has been damaged components, should be replaced with the same specification components.　　(2) welding steps After the pre-soldering treatment, you can carry out formal welding.　　Different welding objects, its need for soldering iron operating temperature is not the same. Judge the temperature of the soldering iron head, you can touch the soldering iron rosin, if there is a "squeak" sound, indicating that the temperature is appropriate; if there is no sound, only to make the rosin barely melted, then the temperature is too low!