Tips for removing stubborn big PLCC chips with hot air ?

[smrieck511]

I'm trying to remove the GLU from a IICX board without damaging it. Currently "practicing" on the NUCHIP which I don't need. Removed as much solder as I could with wick and put plenty of flux on the pins.

Then attempted to remove the NUCHIP with hot air using all the technique I'm familiar with. Unbelievably stubborn and my temperature is too high to begin with. I don't have the heart to punish what seems like a good un-corroded GLU chip this way.

Any veterans have advice on the safest way to get these big chips off the board? Thanks in advance.

 

[finkmac]

why not make a single project thread for this se/30 board? would make things more organized

anyways. lots of flux and fresh solder

i apply lots of flux paste to the legs. then reflow all the legs. then I use my hot air station in a circular motion, aiming at the legs.
i poke the PLCC with tweezers ever so often to see if it moves. when it starts moving I grab it with the tweezers... I keep applying air until it comes off the board.

 

[smrieck511]

why not make a single project thread for this se/30 board? would make things more organized

anyways. lots of flux and fresh solder

i apply lots of flux paste to the legs. then reflow all the legs. then I use my hot air station in a circular motion, aiming at the legs.
i poke the PLCC with tweezers ever so often to see if it moves. when it starts moving I grab it with the tweezers... I keep applying air until it comes off the board.

thanks. Yeah I should make it all one thread going forward. What temperature do you typically use?

 

[obsolete]

Preheat the board so your hot air station doesn't have to work so hard. This will also reduce how much you warp the board from uneven heating.

You can also buy nozzles for specific chip packages that direct the heat evenly toward the pins so you don't have to keep swirling the gun around. They aren't necessary, but they help: https://www.sra-solder.com/soldering-equipment-1/nozzles-1877

 

[smrieck511]

thanks yeah this is a donor board that's been bombed. Beyond repair I think so I'm not too worried about it warping. What temperature are you typically using?

 

[iantm]

This is great advice thank you. Just got a hot air gun and want to try removing some chips from a bombed SE board for practice.