Re: mining motherboard for parts
- From: "colin" <colin.rowe1@xxxxxxxxxxxxxxxxxx>
- Date: Mon, 15 Oct 2007 15:15:01 GMT
"Jon Slaughter" <Jon_Slaughter@xxxxxxxxxxx> wrote in message
news:QNqQi.4597$Pv2.312@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
I had a motherboard that died and I started to mine it for smt parts(mainly
resistors and caps). They are aweful small but come off easy. But I'm not
sure if I'm ruining the parts. When I heat up one side and put some force
on it to either lift tilt it or completely rip it from its pads usually one
side looses any solder it had. I can measure the resistance and
capacitance and they seem to be ok but not sure how well they will work.
Sometimes though one sticks ot the iron and burns pretty quick and I smell
something funny(not quite sure what the smell is).
So what do you guys think?
a big soldering iron bit, very well wetted,
hold on one side of smd for a while,
then quickly move to other side,
usualy there is glue holding it on the board,
so you need to make sure the solder on both sides of the smd
are molten at the same time then apply some force.
if both sides arnt molten the device will most likly be ruined.
sometimes the heat transfer through the smd is enough to keep the other side
molten.
some devices particularly ceramic caps have a very high failure rate when re
used.
devices with many leads are difficult,
a trick I picked up is to thread some fine copper wire <0.2mm
underneath al the pins then pull on the wire as the soldering iron is
applied
to a pin so taht it slides out from under the pin and lifts it slightly.
I only do it if ive run out of a particular value.
Colin =^.^=
.
- References:
- mining motherboard for parts
- From: Jon Slaughter
- mining motherboard for parts
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