LG 20LH1DC1 - Manual (Page 18)

EXTERNAL EQ
UIPMENT SETUP
18
EXTERNAL EQUIPMENT SETUP
PILLOW SPEAKER SETUP
■ Here shown may be somewhat different from your TV.
Connect the PILLOW JACK IN the Pillow Speaker output
jack on the back of the TV.
1. How to connect
1
Connect an accessory pillow speaker or wired remote
control unit to this 6-pin jack.
2
Select PILLOW SPEAKER on the rear panel of the TV. 3
*Note: If the pillow Speaker switch is set to Pillow Speaker, no sound will be
heard from the TV speakers. If pillow speaker switch is set to the Pillow Speaker
position, Auto Volume will be grayed out and not accessible on the Sound menu.
Use a pillow speaker by Curbell, Model A-16455-02 or
other UL recognized pendant control bearing the warning:
“Risk of fire if used in oxygen enriched atmosphere.
Keep pendant control away from oxygen equipment.”
The TV is capable of being controlled by a single-wire,
serial data signal. This is a LG patented technology and is
being implemented by certain brands of “smart” pillow
speakers, such as Curbell’s “GEN-II” models.
Controlling the TV with Serial Data
This connector furnishes three control lines and an audio
output. A patient-pendant remote control, or
entertainment audio and nurse call system may be
connected here. All lines are isolated from the AC power
line and earth ground. (Opto-isolators isolate the control
lines, and a transformer isolates the audio. There are no
relays or inductive components in the control lines.)
Pillow Speaker Interface
Pin 4 (common) is momentarily connected to pin 1,
3, or 6 via push-action switches to control 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 8mA when a switch is closed.
(This operation is identical to previous LG models
using the 5-Wire Interface except that only +7
volts DC was supplied and current draw was only
2.5 mA.)
Controlling the TV with Mechanical Switches
Pillow speaker not included
with TV.
Pin No. Purpose
1 External TV On/Off switch.
2 (Not used.)
3 External Channel Up switch or Data in.
6 External Channel Down switch.
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.