LG 22LG3DDH Owner's Manual page 140

Set up pillow speaker after Express Script/Custom Master TV Setup and cloning procedures are complete.
Connect a Pillow Speaker to the LCD TV
1. Connect the Pillow Speaker to the PILLOW SPEAKER
output jack on the rear jack panel of the TV.
2. Either:
• Slide the SPEAKER SWITCH on the rear jack panel
to PILLOW SPEAKER to control the TV and hear
audio on the pillow speaker.
• Slide the SPEAKER SWITCH on the rear jack panel
to NORMAL SPEAKER to hear audio from the TV
speakers with pillow speaker control of the TV.
Use a pillow speaker that is a UL recognized pendant
control bearing the warning: "Risk of fire if used in oxygen
enriched atmosphere. Keep pendant control away from
oxygen equipment."
Controlling the TV with Serial Data
The TV is capable of being controlled by a single-wire,
serial data signal. This is an LG patented technology and
is being implemented by certain brands of "smart" pillow
speakers.
Controlling the TV with Mechanical Switches
Pin 4 (common) is momentarily connected to pin 1, 3, or 6
via push-action switches to control Power ON/OFF and
Channel Up/Down. These pins are at +13 volts DC (when
measured from pin 4) with the switches open. Current
draw is 8 mA when a switch is closed. (This operation is
identical to previous models using the 5-wire interface,
except that only +7 volts DC was supplied and current
draw was only 2.5 mA.)
Pin No. Description
1 External TV ON/OFF switch.
2 (Not used)
3 External Channel Up switch or Data in.
4 Common connection for control, data, and audio
output. Impedance to earth ground is a 10 meg
resistor in parallel with a 1100 pf capacitor.
5 Isolated audio output. Nominal 14 ohm source
impedance with short circuit protection. Intended for
a pillow speaker with a low-impedance, pad-type
volume control.
6 External Channel Down switch.
206-4190
Reference: Pillow Speaker Setup
TV
SPKR
VOLUME CONTROL
TV
ON/OFF
4
5
6 3
1
2
PILLOW
NORMAL
SPEAKER SPEAKER
PILLOW
SPEAKER
4
5
6 3
1
2
(MALE
PLUG)
CHAN
CHAN
UP
DOWN
1 TV ON/OFF
2 OPEN
3 CHAN UP/DATA IN
4
COMMON
5
AUDIO OUT
6
CHAN DOWN
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