On 29/03/2014 06:00, Cydrome Leader wrote:

I've seen connections like this before- they appear to be solder-free
where the pins or stakes (the ones I saw were square) were just pressed
into plated through holes. I never figured it what the deal with those
were, but it seemed intentional. Why would one solder hundreds of other
joints, but skip just the weird connectors? If they did have a touch of
solder at the edges of the pins, why were the rest of the voids never
filled in?



Dave discusses these connections when doing an airbag controller
teardown and says that they are designed not to be soldered because it
creates a more reliable connection.

https://www.youtube.com/watch?v=kcxw...ilpage#t=17 6
if interested.