[sdiy] Emu XL7 Keypad - Light Sensor

[rsdio at audiobanshee.com]

I fully endorse Simon's suggestions.

I've tried random variate's method, but that always ends up with every leg at a different distance from the PCB, because it's difficult to heat all pins at the same time (at least it was before I got my soldering tweezers with an attachment for DIP parts). After doing that several times, I actually recommend against it. Your "repair" will be seriously inferior to the original manufacturing.

Simon's approach is much better, because you can heat the one leg until the chip is flat against the PCB with equal contact on every leg. Thorough cleaning of the solder from all the pads before replacing the chip makes this possible.

Of course, if you have a hot air gun or soldering tweezers, then it becomes possible to heat all pins at the same time and then apply pressure to align the new chip properly.

Brian


On Jan 28, 2016, at 3:10 PM, Simon Brouwer <simon.o at brousant.nl> wrote:
> The trick is to clean the solder off from all the pads using sucking wick, then put a drop of new solder on just one of the pads. If necessary, apply some extra flux on it.
> Hold the component in place with tweezers, so that one of the legs rest on the drop of solder, and the others are aligned with their respective pads. Solder the leg into the solder drop. If the alignment is off you can still correct it since only one leg is soldered.
> When the component is nicely in place and fixated by the one leg, it is easy to solder the other legs.
> I hope my description is clear enough,
>