Samsung UN55FH6200FXZA - Manual (Page 611)

source to the red Pr jack on the TV,
and the green Y jack on the source
to the green Y jack on the TV.
Screen Brightness
If you find that the colors on your
Samsung TV are correct but just a little
too dark or bright, try adjusting the
following settings in the Picture option
in the Main menu:
ΠBacklight
for LED TV
/ Cell Light
for PDP TV
, Contrast , Brightness ,