Sometimes we need to change or remove a component or device on a printed circuit board for many reasons.
For example, if we have a device that's no longer working or we need to change the value of a component. Perhaps to change the frequency of oscillation or some other reason.
So we need to take the component off the board and replace it with something else.
If we want to remove a through-hole device, we need to first remove the solder from the hole and remove each lead from the device to leave a clean hole that we can then place another device inside.
In order to do so, we'll be using the solder sucker.
We're going to remove this resistor. In order to do so, we need to have access to both sides of the board. We change our vice position so we have access to the back side.
I'll hold the solder sucker and we'll heat on the top side of the board.
So we've removed the solder. Now we want to pull that terminal out of the board.
We heat the device again. Since some residual solder may remain inside the hole, pull with tweezers or pliers.
We repeat the procedure with the solder sucker on the other terminal.
Remove the solder. Heat on the back side of the board. And pull from the top.
Now our device is free.
You can see that both of the holes are clear.
That's how to remove a through-hole device from a circuit board.