Thanks for the help of two friends first! Rosin also added a weld, what is the concept? If the time is too long, what should I do? Let's hang it for a while. OK? What about overheating the soldering iron?
It's possible that the solder does not match the parent material.
Is not the weld?Weld is only a small amount of solder joints, causing poor contact, when the broken.The main reason for this1. solder quality is poor;2. flux reduction or inadequate dosage;3. the welding surface is not pre cleaned, tin plating is not secure;4., the temperature of the iron head is too high or too low, the surface has oxide layer;5. welding time is too long or too short to master well;6. when soldering is not solidified, the welding element is loose;7. component pin oxidation.
