What are the Basic Principles of PCBA Desoldering

In PCBA processing, after checking the soldering quality of electronic components, if any electronic components with poor soldering are found, they need to be disassembled and re-soldered. Not only do we have the principles of doing things, PCBA desoldering also has its own principles. So what are the basic principles of PCBA desoldering?

1. Basic Principle

1) Be sure to figure out the characteristics of the original soldering point before desoldering, and don't do it lightly;

2) Do not damage the components to be removed, wires and surrounding components;

3) Do not damage the pads and printed wires on the PCB during desoldering;

4) For electronic components that have been judged to be damaged, the pins can be cut first and then removed to reduce damage;

5) Try to avoid moving the position of other components. If necessary, restoration must be done.

2. Precautions

1) Strictly control the heating temperature and time to avoid high temperature damage to other components. Generally, the time and temperature of desoldering are longer than those of soldering.

2) Do not use too much force when desoldering - the package strength of components at high temperatures decreases, and excessive pulling, shaking, and twisting will damage components and pads.

3) Absorb the solder on the desoldering point - you can use the soldering tool to absorb the solder, and directly unplug the components, reducing the desoldering time and the possibility of damaging the PCB.

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