​When soldering pad loss due to welding time is too long or repeated welding temperature, welding plate copper inflation will fall off repeatedly, when welding should be more careful.

Will fall off the solder cut with a knife cut to not loose, to prevent circuit chipped along, if your device pin long enough, can cut off the circuit after the joint scrape off insulating varnish, good solder will vision pin welding here

Component pin is not long enough, the use of a thin wire for soldering along the welding plate hole through the welding pins in component, on the other side welding in the welding plate and use hot melt adhesive joint fixed to prevent welding off again

Bonding pad out the loss is very serious not appropriate to the above method is the way you can also choose to fly line, to lead a head welding on the desoldering device pin, the other end connected to welding the weld plate and sealing off in any of the solder joints

If there is a way to bypass, sealing off the pin welding plate element around the same element on the line, you can directly to the device pins welding on the components of pin, abandoned the original welding plate, of course, when welding must see not welding string a prevent burn out elements

The above three methods is when welding components to meet the same situation of commonly used methods.

False welding circuit at all; Virtual welding make solder joints have contact resistance connection status, cause circuit increase noise at work, working condition is not stable, downs, no rules. In addition, there is also a part of the solder joint, the circuit to work for a longer period of time, contact is good, the circuit works well, but the great changes in temperature, humidity and vibration under the conditions of work after a period of time, solder joint contact surface oxidation, increased contact resistance, to the normal circuit doesn't work, a process that sometimes up to two years.

So, false welding phenomenon is easy to find, rework welds can be again, and the virtual welding is latent hidden trouble, difficult to find, must improve the quality of welding, shall be avoided.