1. PCB board into the reflow oven must ensure that the components and circuit board pads in a solderable state before welding.
2. SMT processing welding operation must wear anti-static hat and long hair pulled up
3. Some employees have sweaty hands, should wear gloves, to avoid electrocution accidents.
4. Soldering iron power plug and socket contact must be appropriate to avoid loosening, damage and injury.
5. If the soldering iron to use every day, should use the power outlet switch to control the soldering iron on and off, or in the soldering iron power cord installed on the power switch to avoid frequent plugging and unplugging lead to loose, poor contact, and finally lead to accidents.
6. SMT processing soldering iron head should not be immersed in brazing flux for a long time, can not use other very corrosive chemical industrial products for brazing flux.
7. Small power soldering iron sometimes heat can not reach, welding time is too long, easy to burn electronic components, you can choose a slightly larger power soldering iron, sufficient heat, can reduce the welding time, the solder joint to accept less heat, but not damage, so in the choice of soldering iron also need some practical experience.
8. Select rosin as brazing flux in the welding can improve the wetting effect of electronic components, increasing the weldability of components. Brazing flux can be used directly rosin block, can also be configured into rosin alcohol solution, due to the volatility of alcohol, rosin alcohol solution after use to tighten the bottle cap. Bottle can also be placed in a small piece of cotton, when using the day with tweezers to clip out coated on the printed circuit board or component leads.
9. Note that there is a solder paste on the market (also known as solder oil), with corrosive, suitable for industrial, not for electronic products soldering use. There are also rosin on the market, and not the rosin alcohol solution described in this book, so electronic enthusiasts must pay attention when choosing the needle.
10. Integrated circuits in the entire electronic products should be the last to be soldered, and must wear anti-static bracelets when soldering, soldering iron to reliable grounding. Can also use a special socket for integrated circuits, solder the socket and then insert the integrated circuit, this method is convenient for frequent use and high frequency of damage to the chip repair and replacement operations.
11. SMT processing soldering is completed, the residual brazing agent on the circuit board should be wiped clean with alcohol to prevent carbonization of the brazing agent affect the normal operation of the circuit.
12. After the completion of welding need to turn off the power, clean up the desktop.
13. Soldering iron frequently used for a period of time, the need to replace the power cord to prevent the root of the power cord or internal fracture.
