Here's what the bottom of the board should look like after you have removed the device. If you like to be neat, you can clean the excess flux (yellow goo) with alcohol.
Now we must remove the old LM2596-12S. If
you want to save it for use in another project,
be careful not to damage it. Use solder wick
to remove excess solder and gently remove
it from the PCB. If you do not car about
saving it, cut the body from the legs. This
will allow you to remove each pin seperately
without worrying about damaging the device.
This will also be gentler on your PCB. Be
careful not to apply too much heat to the
PCB because you may remove the copper from
the board.....this is NOT easy to repair!
Here's what the bottom of the board should
look like after you have removed the device.
If you like to be neat, you can clean the
excess flux (yellow goo) with alcohol.
And. the top view
Now place the new, straight-legged LM2596-5
in the same holes until the shortest legs
JUST protrude through the bottom of the board.
You should have just enough leg showing so
that you can solder to it. Be careful not
to push the IC too far into the holes. If
you do, this will make it very difficult
to bend to the angle required.
Now solder each of the pins with a medium-heat
soldering iron (15W to 40W max). Be careful
not to bridge between the legs with solder.
