Samsung PN51E6500EFXZA - Manual (Page 597)

it may not appear in the device list.
N The receiver will work when you
have properly connected the optical
in jack of the receiver to the
DIGITAL
AUDIO OUT (OPTICAL) port of the TV.
N When the receiver (i.e. Home Theater)
is set to On, you can hear sound
output from the TV’s Optical jack.
When the TV is displaying a DTV
(air) signal, the TV will send out 5.1
channel sound to the receiver. When