Fixing a broken PLCC (FPU) socket

[dml]

While extracting an FPU, I noticed a crack in one corner of the socket. This probably happened the last time the chip was inserted.

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Unfortunately this causes the socket to separate at the break with outward pressure from the IC and the pins don't contact properly.

So I had two options. (1) replace the socket or (2) try to fix it. Given how tricky replacement is with the surface mount type, I opted for (2).


I decided to make a tensioning strap from solder braid.

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To get tension, I tacked one end to a part of the socket some distance from the break with JB kwik weld epoxy and let it set.

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I then pulled the braid tightly and held it with pliers, soldering the free tinned end on top of the first tinned end, glued to the socket.

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I added some epoxy to the inside edge of the cracked corner and let that set.


Posting this in case anyone has the same issue and decides to give it a try.

[mikro]

Many years ago I used a wire tie for the exact same purpose. The advantage was that I could really tighten it to my liking.

[rubber_jonnie]

Many years ago I used a wire tie for the exact same purpose. The advantage was that I could really tighten it to my liking.

Yes, I was going to suggest a tie wrap, they're good for getting tension on things.

[dml]

If this doesn't work out I'll change it for a cable tie. I only have the bigger kind handy so the braid was a much better fit. Will see how it goes.

[exxos]

I 3D printed a square to go around the outside. I was half thinking of getting some made in metal at one point.

[dml]

I can confirm this morning the bodge worked well - swapped the IC twice without the repair splitting open again. The ICs are testing good in that socket.

[rubber_jonnie]

Also, I've been trying out UV activated resin as a means of repairing plastic damage and it's very strong and resilient, definitely useful for this sort of thing provided the UV can get in and activate it.