(Topic ID: 185565)

Best Way to Remove IC Chip on PCB - Williams WPC?

By Elicash

6 years ago


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    #16 6 years ago
    Quoted from xTheBlackKnightx:

    Yes. Same process and principle.
    If a circuit is having continual short circuit issues, and not blowing predrivers, diodes, or resistors, this is a testing and correctional method. They come in different spacings based on requirements.

    Many, many, many years ago when I was younger, I knew everything, and was working on my 2nd or 3rd pin (my first "nightmare" one) I used to scoff at using sockets for transistors while debugging/testing PCBs ... specifically the Williams driver board for "Tri-Zone" ... I think I blew two transistors during debug ... desoldered dead one out, soldered new one in, repeat ... when I put the third one in (the one that was going to fix everything), the coil no longer fired and I was baffled. I remember burning an evening triple checking everything. Turned out I screwed up a trace. Now I use sockets until the repair is finished!!!

    I use a dremmel with a cutting disc to cut out dead ICs ... you have got to be careful, but it gets the job done in a snap once you get the gist of it ... use a mask to prevent breathing in the epoxy dust that flies everywhere the first couple of times you do it, and cut along the top of the IC ... not the sides. After a few tries, you'll only cut the metal and you'll have a lot of consistent area left over to safely extract the IC pins.

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