Most electronic components are installed writing side up. Short of that I think that under a magnifying glass you would be able to match up the broken edges to see which way it was installed. The small sensor components are easy to damage from the heat when soldering. A micro sized tip on the soldering iron and quick touch to the leg of component to be soldered to minimize heat soak.
Last edited by luckyhomes; 12-25-2011 at 05:40 PM.