Speaker Output Setup; Method Of Volume Control Port - LG LU34 Z Series Installation Manual

Speaker Output Setup

* Depending on model
• Connect the external speaker to the external speaker out jack on the TV.
NOTE
• External speaker must be used three plug(SE : Single Ended, Stereo) as shown in the drawings and
external speaker fully inserted with external Speaker Jack.
• Otherwise it will cause defect.
• Use only with the 3 Pole 3.5 mm Stereo Jack.
• Do not connect your headphones or earphones to the port for connecting an external speaker.

Method of Volume control port

* Depending on model
• Cable Spec.
GND / Up / Down
28
EXTERNAL
SPEAKER OUT
or
STEREO 8
VOLUME
CONTROL
Control port for Speaker out
+
UP
-
DOWN
GND
RIGHT
LEFT
GND
: Depending on model
Each Up / Down pin is pulled to 3.3 V with CPU GPIO.
CPU detects transition from 3.3 V to GND level for volume control.