Reseating QFP-socketed chips

[Patrick Finnegan]

On Tuesday 07 December 2004 13:19, Jules Richardson wrote:
> Anyone else find that QFP-socketed chips in late 80's / early 90's
> equipment are *really* prone to corroding and needing re-seating?
>
> I've just had to re-seat several on this NCR Tower which were the
> cause of all sorts of problems - yet I don't normally find that DIL
> chips need any re-seating on equipment of this sort of age.
>
> (I *think* QFP's the proper name - commonly used for 80186 / 80188 /
> 80286 chips, which have flat leads underneath the device)
>
> Anyway, I now have a working NCR machine that chucks out more heat
> than a small furnace and makes the lights go dim :-)  (well, almost!)

QFP's are surface-mount (normally soldered down) devices, and PLCCs are 
probably what you're thinking of.

I don't think i've had that problem with any of my machines, but, then 
again, I don't have a whole lot of stuff (which I use) that has PLCC 
parts in it.

Pat
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