What is the U62 pin for?
On the nexus, there is a connector that connects between the device internals and a form of copper sheet on the back cover. What is the purpose of this connector?
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It may be used to act as a ground for the board. My iPhone has a connector to a sheet of metal on the back and my MacBook Pro has connectors to the aluminum bottom panel, both devices using them as grounds. This is my best guess.
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On the nexus7 it seems that u61 and u62 are connected by the back by way of a metallic paint on the plastic. I guess this is a safety addition so it can't be operated without the back being in place.
