Zenith H20J55DT Pillow Speaker Setup, Connect a pillow speaker to the TV, Pillow Speaker Control

Pillow Speaker Setup

Connect a pillow speaker to the TV

Pillow Speaker Control

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. (Opto-isolators isolate the control lines, and a transformer isolates the audio. There are no relays or inductive components in the control lines.)

1

2

3

4

5

6

4

5

63

1

2

T V O N / O F F

O P E N

C H A N U P / D A T A I N

C O M M O N

A U D I O O U T

C H A N D O W N

Pin No. Purpose

1External TV On/Off switch.

2 (Not used.)

3External Channel Up switch or Data in.

4Common connection for control, data, and audio output. Impedance to earth ground is a 10-meg resistor in parallel with a 1100 pf capacitor.

5Isolated audio output. Nominal 14-ohm source impedance with short circuit protection. Intended for

a pillow speaker with a low-impedance pad-type volume control.

6External Channel Down switch.

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 +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 Zenith models using the 5-Wire Interface except that only +7 volts DC was supplied and current draw was only 2.5 mA.)

4

5

S P K R .

6 3

		1
		2
VOLUMECONTROL		(MALE
		P L U G )
TV	CHAN	CHAN
ON/OFF	DOWN	UP

206-4065 Page 15