Identify Mystery SMD component code 470C
Looks like it's an LC filter.  Possibly this one:

http://industrial.panasonic.com/cdbs/www-data/pdf/AWF0000/AWF0000CE1.pdf

Marking code of 470C makes sense for this part, looks like it could be an ELKE470FA with a 100 MHz cutoff frequency, a 47 pF cap, and a "C" month code.