How to diagnose tuner?

goral

goral

Vu+ Newbie
Hi.
Is any way to diagnose tuner in VU+ Uno 4K SE?
I think one of my tuner in box are faulty.
 
How do you want to do, by a RX? The only way is trying an identical tuner and replacing it. Because if you test a different tuner, for instance mounted on a different STB, you can't compare the results, because each type of tuner has different sensitivity to signal.
All this supposing your tuner is recognised but doesn't seem to find every channels possible: is it so?
 
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