Several processes of the printed circuit board are as follows:

1. Welding preparation in advance: Welding preparation in advance includes cleaning welding position, installation of electronic devices and preparation of welding materials, flux and special tools. Left hand solder wire, left hand holding electric ferrochrome (electric wire to keep clean, and make the welding head maintain welding situation anytime and anywhere).

2, heating welding parts: should pay attention to heating all welding parts overall, symmetrical heat.

3, into the electrode: after heating the welding part must be hot, the electrode soldering iron from the opposite door to touch the welding part.

4, remove the electrode: when the electrode melts enough, immediately remove the electrode.

5, remove electric welding: after the solder wire crossing the welding layer or welding parts of the welding position, remove the electric iron.

Handmade welded wire welding circuit boards, PCB circuit board PCB for welding welding technical engineers, often is relatively simple, but for those who never welding welding to, will have some difficult, especially welding welding if made a mistake, then need to be unloaded relatively trouble, meet some quality more bad of the PCB PCB board, The probability of the solder layer falling off is very large.