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LG 55UT640S0UA 55” Ut640s Series Uhd Commercial Signage Tv

User Manual - Page 20

For 55UT640S0UA. Also, The document are for others LG Electronics models: 49UT640S0UA, 65UT640S0UA, 49UT340H0UA, 50UT340H0UA, 55UT340H0UA, 65UT340H0UB, 50UT340H9UA, 55UT340H9UA, 65UT340H9UB, 43UT640S0UA, 49UT640S0UA, 75UT640S0UA, 86UT640S0UA, 55UT342H0UC 65UT342H0UC

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12
ENGLISH
External Speakers
(Depending upon model)
VOLUME
CONTROL
+
-
SPEAKER OUT
LINE OUT
AUDIO
LINE OUT
EXTERNAL
SPEAKER OUT
UP
DOWN
Control port for Speaker out
RIGHT
LEFT
GND
GND
or
: Depending upon 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 upon model)
• Cable Spec.
VOLUME CONTROL
+
-
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.
or
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