Samsung PN51E6500EFXZA - Manual (Page 606)

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 ,
Sharpness , Color , Tint (G/R) and so
on. Go to Picture on the user Menu,