Desoldering Issues

Community PCB Design
1

Hopefully this will be quick to answer, but i’m having a puzzling time desoldering a 2x10 right-angle connector from a 4-layer board. My process was as follows: Clip the connector above the solder joint (topside), use a desoldering pump to remove all solder on the surface and release the pin. This strategy worked well except for two pins in the center that refuse to melt when heat was applied, with or without flux application.

The connections won’t budge or melt, and I nearly delaminated the PCB with heat. If it helps I’m using a Hakko 936, conical tip and leaded solder. Anybody experienced this before?

Thanks in advance!

2

When this happens I usually just apply more solder to them, heat them both up at the same time & pull the connector out from the other side while the solder is wet. Then desolder the holes.

You may have to sacrifice the connector and cut it up till you only have the 2 pins left and remove them one at once.

I take it the PCB was designed without adequate thermal relief on the pads.