bob2200

The lock switch on one of my two key fobs broke off the PC board. I'm trying to attach photos. I think I will try a conductive adhesive for surface mount repair to fix it. Does anybody have experience with this or know the proper orientation of the switch?

Lexmus

Looking at the photos, I am trying to understand why the switch has black spots at the four spots were it is soldered to the printed circuit board, in addition to the two extra black spots at the mid points.

Normally you can determine the orientation of the part by closely comparing the component solder pads to those on the board using a microscope or other magnifying instrument, as there will be slight differences in the surfaces of each one and you can match them up.

bob2200

The solder contacts on the switch came out black on the photo, but they are not quite that black in actual viewing. Maybe the reason they failed is that they were not properly tinned before wave soldering. I used a 10x jewelers loop and still can't figure out the orientation. The switch contacts don't have solder on them and the PC-board lands all look the same to me. It's about $50 on eBay for a used key fob. I already spent the $28 for a cut key (also on eBay) without the electronics.