Padu wrote: > ----- Original Message ----- > From: "Robert Rolf" > >>Not really. >>Get a paint stripper hot air gun. Make a air directing funnel out of >>aluminum foil, or plumbing parts, to get a smaller diameter hot air blast. >>Carefully bring the running stripper up to the chip on the board (board >>held up side >>down). The solder will melt on all pins very quickly and the chip will >>drop off the board. (you may need to tap it). >> Be VERY careful to come in quickly and pull away >>quickly so as to not overheat the other parts and traces. >>Should take all of 5 seconds with a preheated stripper. > > > Do you think it would work with a hot air gun (the ones used for shrinking > plastic)? Yes. They probably get hot enough. Try it on coil of solder on your bench and see what it takes to melt it. Needs to be FAST. e.g. less than 10 seconds. Generally if you can see the heating coils turning red, it's probably hot enough. You can crudely control temperature by blocking the air inlet to make the flow slower and hotter. You can also you a suitably rated (1800W) light dimmer (commercial grade) depending on what the hot air gun pulls for current. > I do have one of these, I'll try on a trash board first. Otherwise I'll buy > one at home depot. > > >>>I have lots of spare ports, maybe I could cut the trace that >>>is connected to the damaged port and re-wire it to another pin using >>>hookup >>>wire? >> >>Cutting the trace would also let you confirm that it is the PIC that >>is fried, and not the logic gate that it connects to. >>If the logic is fried, it could be clamping the PIC pin to 1V (about >>a diode drop at 20mA) > > > So if I read correctly, you'd recommend replacing the chip either way right? No. If it turns out that it is your logic chip that is loading the PIC, you only need to replace the logic. Had this happen to me so just passing on what I've learned. Robert -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist