Northern Airborne Technology AA20-431 User Manual

SM22

AA20-431

Cabin PA System

INSTALLATION AND OPERATION MANUAL

REV 4.10 April 21, 2004

Northern Airborne Technology Ltd.

1925 Kirschner Road

Kelowna, BC, Canada.

V1Y 4N7

Telephone (250) 763-2232

Facsimile (250) 762-3374

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM22 Rev. 4.10 AA20-431 Cabin PA System Manual

Performed at factory

Periodically NAT will release manual amendments. In order to maintain the most accurate and up to date manual these amendments should be carried out immediately upon receipt and recorded on the following amendment record.

AMENDMENT RECORD

Amendment

Number

Amendment

Date

Section(s)

Changed

Date

Entered

Entered By

1 Jan 18\05 2 2 Feb 17/09 2

Insert any Amendment Instruction sheets after this page.

Apr 21, 2004 Page ii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIR BORNE TECHNOLOGY LTD.

INSTALL_OPS MANUAL AMENDMENT

Manual: SM22 (AA20-431) Amendment #: 2 Document # SM22\Install_Ops\809-0002 Amendment Date: Feb 17, 2009

The purpose of this amendment is to add the latest documents and drawings to the manual.

Amendment Instructions:

2-1 and 2-2 Rev 4.10 Amendment #1 2-1 and 2-2 Rev 4.10 Amendment #2 2-5 Rev 4.10 Amendment #1 2-5 Rev 4.10 Amendment #2

AA20\431\905-0 Rev 1.02 AA20\431\905-0 Rev 1.03

– AA20\431\922-0 Rev 1.20

Note: Ensure that all drawings are inserted in the order shown on the latest drawing lists.

Remove Drawings (Section 2) Replace or add Drawings (Section 2)

3 Update the Amendment Record sheet at the front of the manual. 4 Insert this page into the manual after the Amendment Record sheet (page ii).

Manual Amendment ends after the following amended pages

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Amendment #2 Feb 17, 2009 Page 1

ENG-FORM: 809-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

INSTALL_OPS MANUAL AMENDMENT

Manual: SM22 (AA20-431) Amendment #: 1

Document # SM22\Install_Ops\809-0001 Amendment Date: Jan 18, 2005

The purpose of this amendment is to add the Environmental Qualification Form (521-0) to section 2.6 and to update section 2.3.5 Cable and Wiring statement paragraph 1.

Amendment Instructions:

2-1 thru 2-5 Rev 4.10 2-1 thru 2-5 Rev 4.10 Amendment #1

- AA20\431\521-0 Rev 1.00

Remove Drawings/Documents (Section 2) Replace or add Drawings/Documents (Section 2)

Note: Ensure that all drawings are inserted in the order shown on the latest drawing lists.

3 Update the Amendment Record sheet at the front of the manual.

4 Insert this page into the manual after the Amendment Record sheet (page ii).

Manual Amendment ends after the following amended pages

Remove Pages Replace With Pages

Amendment #1 Jan 18, 2005 Page 1

ENG-FORM: 809-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM22 Rev. 4.10 AA20-431 Cabin PA System Manual

Section Title Page

1.0 Description

1.1 Introduction 1-1

1.2 Purpose of Equipment 1-1

1.3 Features 1-1

1.4 Specifications 1-2

1.4.1 Electrical Specifications 1-2

1.4.2 Physical Specifications 1-3

1.4.3 Environmental Specifications 1-4

2.0 Installation

2.1 Introduction 2-1

2.2 Unpacking and Inspection 2-1

2.2.1 Warranty 2-1

2.3 Installation Procedures 2-1

2.3.1 Note to Installers 2-1

2.3.2 Warnings 2-2

2.3.3 Cautions 2-2

2.3.4 Notes 2-2

2.3.5 Cabling and Wiring 2-2

2.3.6 Fuses and Breakers 2-2

2.3.7 Adjustments 2-3

2.3.8 Post Installation Checks 2-4

2.4 Continued Airworthiness 2-5

2.5 Accessories Required But Not Supplied 2-5

2.6 Installation Drawings 2-5

3.0 Operation

3.1 Introduction 3-1

3.2 General 3-1

3.3 Switches and Indicators 3-1

3.3.1 Power Switch 3-1

3.3.2 Speaker switch 3-1

3.4 Chimes 3-2

3.4.1 No Smoking 3-2

3.4.2 Seatbelt 3-2

3.4.3 Message 3-2

3.4.4 PA 3-2

Apr 21, 2004 Page iii

ENG-FORM: 820-0109.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM22 Rev. 4.10 AA20-431 Cabin PA System Manual

Section 1.0 Description

1.1 Introduction

This manual contains information on the AA20-431 Cabin PA System. All derivatives will be covered by manual supplements which can be obtained from NAT as required.

Information in this section consists of purpose of equipment, features and specifications.

1.2 Purpose of Equipment

The AA20-431 is a passenger announcement and entertainment system, capable of providing a 30 W/8 Ω speaker output for in flight music, messages and advisory tones. The system also provides eight 150 Ω headset outputs for use in operational environments where it is not practical to use the speaker output.

The AA20-431 PA controller provides central adjustment for all the PA and music audio to the passengers. Automatic chime before announcements and soft music muting are standard features.

1.3 Features

The AA20-431 accepts music inputs from either portable cassette tape/CD players or remote CD changers/am/fm cassette players. The left and right music inputs are summed internally.

Music audio will mute and chime will activate prior to cabin pages; this allows for undistracted passenger attention. ‘Seat Belt’ and ‘No Smoking’ sign interlocks energize the chime circuit when enabled and disabled. The Microphone input has an adjustable sidetone amplifier, which provides ‘PA sidetone’ to the audio controller.

A +3 dB switch input allows the output level to change to suit aircraft operating conditions.

The AA20-431 features Thermal and Overload protection circuits. These circuits provide the internal circuitry with protection from over-voltage, over-current and high temperature conditions.

Apr 21, 2004 Page 1-1

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AA20-431 Cabin PA System Manual SM22 Rev. 4.10

1.4 Specifications

1.4.1 Electrical Specifications

Input Power: 22 to 30 Vdc, 280 mA idle (2 A max.)

Lamp Power: +28 Vdc, 80 mA

Inputs

Music: Two tape inputs, left & right channel mixed

internally Tape audio levels: 1.0 Vrms @ 1 kHz (Input impedance 8.6 kΩ) CD audio levels: 400 mVrms @ 1 kHz (Input impedance 10 kΩ) (Note: remove internal jumpers for CD input)

Microphones: High impedance 150 Ω amplified dynamic. ALC

starts at 70 mVrms. Impedance is 125 Ω ±10%.

PA Key: Active low. Current source 15 mA max. (chime

will activate only once)

Seat Belt & Active low. Current source 15 mA max. No Smoking Key: Trigger Voltage 2 Vdc max. (chime will activate

twice, once on keying and again on un-keying)

Message Key: Active high. Current sink 15 mA max. Trigger

voltage 28 Vdc max. (chime will activate twice,

once on keying and again on un-keying)

+3 dB Key: Active open. Current source 1 mA max. (headset & speaker audio levels will decrease

by 3 dB when grounded)

Outputs

Headset: Eight outputs – 80 mW max each into 600 Ω @ 10%

THD Short circuit protected. Audio Bandwidth: Mic channel – <3 dB, 350 Hz to 3 kHz Music channel – <3 dB, 150 Hz to 9 kHz

Signal to noise ratio – 65 dB

Sidetone: Adjustable 0 – 100 mW into 600 Ω @ 10% THD. Audio bandwidth: <3 dB, 350 Hz to 3 kHz Signal to noise ratio – 65 dB

Page 1-2 Apr 21, 2004

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

SM22 Rev. 4.10 AA20-431 Cabin PA System Manual

Speaker: 25 W into 8 Ω @ <10% THD

20 W into 8 Ω continuous power with single tone

35 W max @ 26.6% THD into 8 ohms with 1 Vrms

into music input and music and speaker trim pots

fully clockwise.

28 Watts max. @ 10% THD into 8 Ω with 1 Vrms

into the music input.

Impedance and short circuit protected

Audio Bandwidth: Mic channel – <3 dB, 350 Hz to 3 kHz Music channel – <3 dB, 150 Hz to 9 kHz Signal-to-noise ratio – 65 dB

Chime: Fixed rate, adjustable level

Miscellaneous

Temperature Sensor: The unit contains a temperature sensor IC

which when triggered reduces the input signals

by 3 dB

The IC threshold is set to approximately 129° C

1.4.2 Physical Specifications

Height: 1.12 ″ (28.45 mm)

Depth: 7.25 ″ (184.15 mm) max.

6.52 ″ (165.61 mm) behind faceplate

Width: 5.75 ″ (146.05 mm) max.

5.00 ″ (127.00 mm) behind faceplate

Weight: 1.3 lbs (610 g)

Mounting: Unit fits standard Dzus rails Note: requires rails for maximum heat

dissipation

Finish/Material: Chassis & cover are 5052-H32 brushed

aluminum with chromate conversion. Heat

sinks are 6063-T6 aluminum with chromate

conversion

Connectors: Male filtered 37 pin D-subminiature with

Positronics V5 locking tabs.

Apr 21, 2004 Page 1-3

ENG-FORM: 800-0107.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

AA20-431 Cabin PA System Manual SM22 Rev. 4.10

1.4.3 Environmental Specifications

Operating Temperature: -30° C to +55° C

Survival Temperature: -55° C to +85° C

Altitude: 35,000 ft

Humidity: >95% at +50° C

Vibration/Shock: DO-160C, Cat. M, N

TSO Compliance: TSO-C50c, RTCA DO-170 Class II (Applicable to units s/n 2000 and above)

DO-160C Env. Cat. : C4-BA[MN]XXXXXXABABBTBXXX

1.5 Unit Nomenclature

Model Description

AA20-431 3-tone chime, Seat Belt & No Smoking chime interlock 30 W into 8 Ω.

PA over-ride with sidetone.

End of section 1.0

Page 1-4 Apr 21, 2004

ENG-FORM: 800-0107.DOT

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+ 19 hidden pages

Northern Airborne Technology AA20-431 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

AMENDMENT RECORD

Table of Contents

1.1 Introduction

1.2 Purpose of Equipment

1.3 Features

1.4 Specifications

1.4.1 Electrical Specifications

1.4.2 Physical Specifications

1.4.3 Environmental Specifications

1.5 Unit Nomenclature