Well, in order to solve such a problem, we should pay more attention to a certain aspects.

Dry or cold solder joint means that there is a small amount of tin column in the welding spot, which causes bad contact in the circuit.

In order to solve such a problem, we should pay more attention to at least these aspects, such as the quality of solder paste, flux quantity and quality, the temperature of soldering iron, soldering time, components itself quality (no pin oxidation).


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