LG UV66 Series, Owner'S Manual, Page: 22 / 40

ENGLISH
12
Speaker output setup
(Depending on model)
VOLUME
CONTROL
+
-
STEREO
(8 )
EXTERNAL
SPEAKER OUT
UP
or
DOWN
Control port for Speaker out
RIGHT
LEFT
GND
GND
: Depending on model
•
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
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.