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34
Mastering the Art of Soldering
the solder under the pin no matter how long the wick is applied, this technique usually works.
For this technique, just be gentle and try to limit how long you apply heat to the component
and the PCB.
5. Mistake? Just desolder it!
5.1 Introduction
The previous chapters discussed what you need to know about soldering: the materials that
you will need, safety precautions, soldering THT and SMT components as well as some
common soldering issues. But have you ever wondered what to do if you want to remove
those components that you soldered?
Desoldering and replacing component/components is not as easy as soldering them. In fact,
one of the frustrations one experience is when you mounted a wrong component on PCB
and then you need to remove and fix it. In this case, you need to know how to desolder.
When desoldering, you will need to use a
desoldering pump
,
solder wick
(not included in
the kit),
isopropyl alcohol
(not included in the kit),
soft toothbrush
(not included in the kit),
cleaning sponge
(not included in the kit),
flat-tip screwdriver
The desoldering pump and the solder wick are both introduced at the beginning of this
manual. Other materials are simple materials that can found at home.
5.2 Preparations before Desoldering
Before desoldering, prepare your soldering iron, and the materials mentioned above and do
the following steps:’
1. Turn ON the soldering iron
. Wait for the iron to get hot and clean the soldering iron
tip using wet sponge. Every time you notice black parts on the soldering iron tip, clean it
again.
2. Locate the component’s terminals.
Find the component that you want to remove
and locate its terminals. It is on one side of the PCB, the solder side. The other side is the
component side where you can find the component.