LG Electronics 42CQ610H Reference Pillow Speaker Setup, Connect a Pillow Speaker to the LCD TV

Reference: Pillow Speaker Setup

The pillow speaker will only be functional after the Express Script/Custom Master TV Setup and cloning 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.

Connect a Pillow Speaker to the LCD 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. (Optoisolators isolate the control lines, and a transformer isolates the audio.) Earth ground is provided on pin 4 (Common) in the default configuration (e.g., for Zenith/Philips pillow speakers). For negative voltage configuration (e.g., for RCA pillow speakers), +5 volts is provided on pin 4 (Common), with pin 3 (Channel Up/Data In) referenced to ground.

The following table describes the 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. Intended for a pillow speaker with a low-
	impedance, pad-type volume control.
6	Analog external control for Channel Down.

Typical Pillow Speaker

(Serial Data Control)

TV

POWER

CHANNELVOLUME

PREVMUTE

SLEEPOPTION

PILLOW SPEAKER

Pillow Speaker Interface Pinout

		1	TV ON/OFF
4		2	NC
5	3	3	CHAN UP/DATA IN
6		4	COMMON
1
			AUDIO OUT
2		5
		6	CHAN DOWN

Typical Schematic for

Analog Pillow Speaker

Controlling the TV with Mechanical Switches

A typical analog pillow speaker with mechanical switches will momentarily connect pin 1, 3, or 6 to pin 4 (Common) to control Power ON/OFF, Channel Up, or Channel Down (see schematic at right). These pins are at +13 volts DC (when measured from pin 4) with the switches open. Typical 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.)

SPKR

VOLUME CONTROL
TV	CHAN
ON/OFF	DOWN

4

5

6 3

1

2

(MALE

PLUG)

CHAN

UP

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