Steps for using the soldering iron:
Preheating: The tip of the soldering iron is at a 45-degree angle, against the pad and component feet. Pre-heat the component pins and pads. The tip of the soldering iron tip should not stand against the copper-free position of the PCB, as this may burn the board into a trace; the soldering iron tip should follow the direction of the circuit: the soldering iron tip should not block the via hole: the preheating time is 1 to 2 seconds.
Tinning: introduce the tin wire from the contact surface of the component foot and the soldering iron; when the tin wire melts, master the speed of the wire; when the tin is scattered all over the pad, remove the tin wire; the tin wire cannot directly lean on the soldering iron tip, To prevent the flux from burning black; the entire tinning time is about 1 to 2 seconds.
Remove the tin wire: remove the tin wire and place it on the pad; the time is about 1 to 2 seconds.
Remove the soldering iron: When only a slight smoke comes out of the solder, you can remove the soldering iron: the solder joint is solidified.
