3 ms·
It's risky to use hot air spot-heating a high density multi layer PCB, as these boards aren't really designed for differential heating and can delaminate easily
by adammunich 7y ago
It's risky to use hot air spot-heating a high density multi layer PCB, as these boards aren't really designed for differential heating and can delaminate easily.
You really should heat the whole board uniformly to be safe, but that is a danger to do when you aren't sure of the melting temperature of the solders used.
- omgtehlion 7y agoYou set preheater to 120c and hot air with smallest nozzle to 240c, works 100% like a charm
- jve 7y agoDo you still need to apply flux before desoldering?
- adammunich 7y agoYou will need to apply it afterward to clean the pads.
- omgtehlion 7y agoYou need it while desoldering, while cleaning nopb solder (yes, you have to clean, or joint will crack later), and while soldering in the replacement. Flux is cheap, better use it all the time.
- segfaultbuserr 7y ago"The bigger the glob, the better the job" is not the best practice when you're soldering components, but it's very true when you are reworking a SMD board...