ludi wrote:Sometimes you have ground planes in the PCB that also act as fairly good heatsinks. In those cases you may need to desolder the pins individually using a cranked-up iron and either a desolering bulb or a reel of desoldering braid.
just brew it! wrote:Yes, ground/power planes can be a bitch. They act like heat sinks and keep the solder from melting. I learned that the hard way a while back trying to replace capacitors on a motherboard.
As ludi says, you may need to desolder the leads individually by hand.
Depending on when the device was manufactured, it may also be using lead-free solder. Lead free solder has a higher melting point (but I still would've expected 400C to be more than enough).
Chairman_Now wrote:If it's a power/ground plane, you'd need an underboard pre-heater, ideally, or you'd need to heat the entire component fairly quickly to get it off.