The soldering process of the chip integrated circuit is as follows:

　　① Use an electric soldering iron to smooth the solder joints on the circuit board. If necessary, repair the solder joints with less solder, and then clean the impurities around the solder joints with alcohol.

       ② Align the welding position of the integrated circuit to be welded with the circuit board, and then use an electric soldering iron to solder the four diagonal pins of the integrated circuit, fix the integrated circuit, and apply pine perfume or sprinkle some on the pins Rosin powder.

       ③If you use a hot air gun to solder, you can use a hot air gun to blow and weld the pins around the integrated circuit. After the solder on the solder joints on the circuit board is melted, remove the hot air gun, and the pins will stick to the solder joints of the circuit board. If you use an electric soldering iron for soldering, you can dip a small amount of solder on the tip of the soldering iron, and then drag it on a row of pins. The solder will stick each pin with the solder joints of the circuit board. If some pins of the integrated circuit are short-circuited by the solder connection, you can first use multiple strands of copper wire to suck away the excess solder, and then apply rosin to the place, and use an electric soldering iron to heat the place, and the remaining solder between the pins It will automatically disconnect and return to the pin.

       ④After the soldering is completed, check whether there is a short circuit or missing solder between the pins of the integrated circuit. During the inspection, you can use a magnifying glass or a multimeter to detect. If there is a missing solder, use a pointed soldering iron to repair the integrated circuit. Finally, use anhydrous alcohol to remove the integrated circuit. Clean the surrounding rosin.