Blimey, the soldering on that Corsa one looks a bit rough
Used keyfobs in general are quite greasy, also I keep the iron in there for as short a time as possible.
As I pre tin the switches I have to melt the pads back then hold together and try to solder within 2 seconds.
It is a strong joint and it is well flowed not dry.
My soldering may not be that neat but it will last.
That Corsa was a right bugger though, it was greasy, covered in a strange substance and needed a good clean.
Remember those pads are only about 2mm square and the switch lug about 1.5mm wide, blown up shows any flaws much more than looking at it directly.
Lol, I assumed thats how they arrived!
You dont need to tin the switch contacts (they are tin dipped)
You do need to solder wick the old solder off the pads first (it wil be oxidised and not flow well again).
Then its a case of locate the switch and quick reflow of the old solder to hold it in place.....then solder the opposite end with fresh and repeat on the original.....
Should be better than production using the above methods.
Alcohol is very good for cleaning the boards to remove nasty substances and flux residue
I use meths, the other components are not good - sometimes the joints are snapped.
I do retin them as I find the solder flows around the pins better, and I can clean the flux off before fitting.
I usually find very little solder left after switch removal - I normally cut them off, excess solder wiped off with kitchen towel.
My joints may not be overly neat but defiantely better than standard
I'll get the wick though - good idea
BTW I have repaired around 50 fobs now!
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Topic: New spare key (Read 3093 times)