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Reference: Pillow Speaker Setup
The pillow speaker will only be functional after the Express Script/Custom Master TV Setup and/or
cloning/USB configuration procedures are complete.
Note: When Installer Menu item 027 HOSPITAL MODE is set to 254 (factory default value), there is no
power (voltage) supplied to the pillow speaker interface.
Connecting a Pillow Speaker to the TV
Connect the pillow speaker (see example at right) to the PILLOW
SPEAKER interface on the rear jack panel of the TV.
Caution: 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
These TV models are 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.
Pillow Speaker Interface
This connector provides an interface for patient-pendant remote
control or entertainment audio and nurse call systems. All lines are
isolated from the AC power line and earth ground (a transformer
isolates the DC supply, optocouplers isolate the control lines, and a
transformer isolates the audio). For positive voltage configurations
(e.g., for Zenith/Philips pillow speakers), +12 volts/+5 volts is provided
on pin 3 (Channel Up/Data In) in reference to pin 4 (Common). For
negative voltage configurations (e.g., for RCA pillow speakers), +5
volts is provided on pin 4 in reference to pin 3.
The following table describes the TV pillow speaker interface pinout.
See also diagram at right.
Pin No.
Description
1
Analog external control for TV ON/OFF.
2
No connection.
3
Analog external control for Channel Up or Serial Data In.
4
Common connection for control, data, and audio output.
5
Isolated Audio Output. Nominal 14 ohm source impedance
with short circuit protection. Audio level control provided by
an external low-impedance, pad-type volume control or serial
data Volume Up/Down keys.
6
Analog external control for Channel Down.
86
Typical Pillow Speaker
(Serial Data Control)
PILLOW SPEAKER
TV Pillow Speaker Interface Pinout
1
3
2
3
4
6
2
4
5
1
5
6
POWER
GUIDE
INFO
ENTER
PORTAL
RETURN
CHANNEL
VOLUME
MUTE
TV ON/OFF
NC
CHAN UP/DATA IN
COMMON
AUDIO OUT
CHAN DOWN
206-4342
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