How to remove a plastic cpu from mobo without cutting legs?

[slava]

Subject.

What instruments do you use to unsolder a chip and leave aluminium pins untouched? For example an intel NG80386SX-16.

[Marcin]

Hello Slava

That tool have name : PLCC EXTRACTOR. This tool is using in profesional electrical service but all CPU collectors must have this nice item.

Now I'm at work so later I will post picture. This tool cost here about 5 euro.

[gshv]

I used heat gun (hot air gun) with very good results. It may not remove all solder from the pins, but the pins stay in perfect condition. I think this method is safer for the chip than CPUShack's "hot oven" method.

Gennadiy

[Mixeur]

[CPUShack]

I have a hot air rework station for the smller ones, and a toaster oven for the larger ones.

Nte, it is preferable to do this is a well ventilated area, as solder fumes are real bad for you.

[fRaSsL]

This is no solder fume. This is fume of burning PCB

[Mixeur]

and more precisely of varnish of the pcb

[gshv]

[andamus]

Hi,
I'm using a heat-gun too, with a lot of time you can desolder dip chips too. In the past I've used a butane torch, it's very fast but you have to use it ONLY outside in a open space, because both paint and pcb burn creating a lot of toxic fumes and sometimes the pcb pop and trow away small pieces (like smd capacitors) that can harm you. Some times ago I was desoldering a 486 and the pcb popped really hard trowing to my face many chips luckly I was wearing a pair of safe-glasses.

Andamus

[JOSE LUIS RODRIGURZ]

Hi. I almost every one of you, I use hot air gun to desolder CPU from mobos, but I want you to Know that I you If you have like me this afternoon a very beatiful AMD 386 CPU -with the warranty still stick in it`s surface- you must remove that plastic sticker. It creates a variation of temperature in the CPU plastic surface with cracking results. Too sad situation.......As you know, that little pieces of technology were made by millions, but they`ll never be done again, so every-time one of those is lost a little piece of history is gone.