right man.. does your tuner have sharp wrote on top or is it fake tuner with no description of make,!
Has a matter of fact my clone S10 has a SHARP mark and always performed readily.
My original S10 (only considered has such because it could load official firmware) did not have a SHARP mark tuner (other design) and was less sensitive!!
That's why I ordered 2 'S10 tuners' from Hong Kong / Theses are working well but signal quality fluctuate on HD channels (overall HD quality is very good).
I re-installed recently my original Sharp tuner on original box and found Signal quality was less fluctuating on HD channels (and not at all with Maldives firmware 1 %).
jojoke