20
MAKING CONNECTIONS
ENG
ENGLISH
Audio connection
(Only 32/37/42/47LT64 , 32/37/42/47LT66 ,
32/37/42/47LT38 ,
,
32/37/42/47LT76 )
You may use an optional external audio system
instead of the built-in speaker.
NOTE
y
y
If you use an optional external audio device
instead of the built-in speaker, set the TV
speaker feature to off.
Digital optical audio connection
Transmits the digital audio signal from the TV to an
external device. Connect the external device and
the TV with the optical audio cable as shown in the
following illustrations.
OPTICAL AUDIO IN
OPTICAL
DIGITA
TT L
AUDIO OUT
Digital Audio System
(*Not Provided)
NOTE
y
y
Do not look into the optical output port.
Looking at the laser beam may damage your
vision.
y
y
Audio with ACP (Audio Copy Protection)
function may block digital audio output.
Speaker output SETUP
Connect the external speaker to the Speaker
output(STEREO) jack on the TV.
(Only LT64 LT66 LT38
)
y
y
Each Up/ Down pin
is pulled to 3.3V
with CPU GPIO.
y
y
CPU detects
transition from 3.3V
to GND level for
volume control.
Method of Volume control port
Cable
Spec.
VOLUME
CONTROL
STEREO
SPEAKER
OUT
(8 )
GND / Up / Down
VOLUME
CONTROL
STEREO
SPEAKER
OUT
(8 )
UP
Control port for
Speaker out
DOWN
R -
R+
L -
L+
VOLUME
CONTROL
STEREO
(8 )
Control port for
Speaker out
UP
DOWN
GND
LEFT
RIGHT
GND
(Only LT769*)
