LG 22LG3DCH - Manual (Page 31)

EXTERNAL
EQ
UIPMENT
SETUP
29
PILLOW SPEAKER SETUP
■ Connect a pillow speaker to the LCD TV/Monitor.
PILLOW PILLOW
SPEAKER SPEAKER
NORMAL NORMAL
SPEAKER SPEAKER
PILLOW PILLOW
SPEAKER SPEAKER SPEAKER SWITCHSPEAKER SWITCH
(Except 32LG3DC)
1. How to connect
Connect the P PIILLLLO OW W S SP PE EA AK KE ER R output jack on the
back of the TV.
Connect an acccessory pillow speaker or wired remote
control unit to this 6-pin jack.
Select P PIILLLLO OW W S SP PE EA AK KE ER R on the rear panel of the
TV.
2
1
3
■ NOTE: If the pillow speaker switch is set to Pillow Speaker, no
sound will be heard from the TV speakers. Also, Auto Volume will
be grayed out and not accessible on the Sound menu.
Use a pillow speaker that is a UL recognized pendant control
bearing the warning:
“Risk of fire if used in oxygen enriched atmosphere. Keep pen-
dant 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 a LG patented technology and is being implemented
by certain brands of “smart” pillow speakers.
Pillow Speaker Interface
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. (Optoisolators isolate
the control lines, and a transformer isolates the audio. There are
no relays or inductive components in the control lines.)
Controlling the TV with Mechanical Switches
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 +13volts DC(when measured from pin4) with
the switches open. Current draw is 8 mA 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.)
pin No.
1
2
3
4
5
6
External TV On/Off switch.
(Not used.)
External Channel Up switch or Data in.
Common connection for control, data, and
audio output. Impedance to earth ground is a
10-meg resistor in parallel with a 1100 pf
capacitor.
Isolated audio output. Nominal 14-ohm source
impedance with short circuit protection.
Intended for a pillow speaker with a low-impe
ance pad-type volume control.
External Channel Down switch.
Purpose