Samsung UN46ES7500F E-Manual page 549

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