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LG UT570H 65" Class 4K UHD HDR SmHospitality LED TV User Manual

Page 20

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12

ENGLISH

External Speakers

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