Garmin GMA 240 Installation Manual

190-00917-01 June, 2012 Revision D

GMA 240

Installation Manual

P ILO T COPILOT

MUTE

MON

SQ

OFF/

VOL

SQ

VOL

PULL

MUSIC

VOL

TEL

GMA 240

PILOT

IS O

MUTE MUS IC

MUS IC

IC S

RADIO

NAV1 NAV2 AUX1 AUX2

COM1

MIC

COM1

COM2

COM2

MIC

TEL

1

1-2

1

2

GMA 240 Installation Manual 190-00917-01

Page A Rev. D

© Copyright 2012

Garmin Ltd. or its subsidiaries

All Rights Reserved

Except as expressly provided herein, no part of this manual may be reproduced, copied,

transmitted, disseminated, downloaded or stored in any storage medium, for any purpose without

the express prior written consent of Garmin. Garmin hereby grants permission to download a

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storage medium to be viewed and to print one copy of this manual or of any revision hereto,

provided that such electronic or printed copy of this manual or revision must contain the complete

text of this copyright notice and provided further that any unauthorized commercial distribution of

this manual or any revision hereto is strictly prohibited.

Garmin International, Inc.

1200 E. 151st Street

Olathe, KS 66062 USA

Telephone: [phone]

Aviation Panel-Mount Technical Support Line (Toll Free) 1.888.606.5482

www.garmin.com

Garmin (Europe) Ltd.

Liberty House, Bulls Copse Road

Hounsdown Business Park

Southampton, SO40 9RB U.K.

+44/ (0) 870.8501241

Garmin AT, Inc.

2345 Turner Rd., SE

Salem, OR 97302 USA

Telephone: [phone]

RECORD OF REVISIONS

Revision Revision Date Description

A 06/09/08 Initial Release

B 01/18/11 Clarified backlighting info

C 04/13/11 Clarified mono/stereo headset switch info

D 06/16/12 Corrected temperature range spec

190-00917-01 GMA 240 Installation Manual

Rev. D Page i

INFORMATION SUBJECT TO EXPORT CONTROL LAWS

This document may contain information which is subject to the Export Administration Regulations

("EAR") issued by the United States Department of Commerce (15 CFR, Chapter VII, Subchapter C) and

which may not be exported, released, or disclosed to foreign nationals inside or outside of the United States

without first obtaining an export license. The preceding statement is required to be included on any and all

reproductions in whole or in part of this manual.

This product, its packaging, and its components contain chemicals known to the

State of California to cause cancer, birth defects, or reproductive harm. This

Notice is being provided in accordance with California's Proposition 65. If you

have any questions or would like additional information, please refer to our web

site at www.garmin.com/prop65

.

CURRENT REVISION DESCRIPTION

DOCUMENT PAGINATION

WARNING

Revision

Page

Number

Section

Number

Description of Change

D

1-3 1.3.2 Correct temp range spec

3-2 3.2

Removed #16 AWG wiring info, updated Table 3-2

and wiring info

4-6 4.5.2 Corrected description in Table 4-8

A-1, A-2 Appdx A Added connector numbers to drawings

Section Page Range

Table of Contents i – vi

Section 1 1-1 – 1-4

Section 2 2-1 – 2-6

Section 3 3-1 – 3-4

Section 4 4-1 – 4-10

Appendix A A-1 – A-3

Appendix B B-1 – B-4

Appendix C C-1

GMA 240 Installation Manual 190-00917-01

Page ii Rev. D

GMA 240 HARDWARE MOD LEVEL HISTORY

The following table identifies hardware modification (Mod) Levels for the GMA 240 Audio

Pan e l. Mod Levels are listed with the associated service bulletin number, service bulletin date, and the

purpose of the modification. The table is current at the time of publication of this manual (see date on front

cover) and is subject to change without notice. Authorized Garmin Sales and Service Centers are

encouraged to access the most up-to-date bulletin and advisory information on the Garmin Dealer

Resource web site at www.garmin.com using their Garmin-provided user name and password.

MOD

LEVEL

SERVICE

BULLETIN

NUMBER

SERVICE

BULLETIN

DATE

PURPOSE OF MODIFICATION

190-00917-01 GMA 240 Installation Manual

Rev. D Page iii

Aviation Limited Warranty

All Garmin avionics products are warranted to be free from defects in materials or workmanship for: one

years from the date of purchase for new Remote-Mount and Panel-Mount products; one year from the date

of purchase for new portable products and any purchased newly-overhauled products; six months for

newly-overhauled products exchanged through a Garmin Authorized Service Center; and 90 days for

factory repaired or newly-overhauled products exchanged at Garmin in lieu of repair. Within the applicable

period, Garmin will, at its sole option, repair or replace any components that fail in normal use. Such

repairs or replacement will be made at no charge to the customer for parts or labor, provided that the

customer shall be responsible for any transportation cost. This warranty does not apply to: (i) cosmetic

damage, such as scratches, nicks and dents; (ii) consumable parts, such as batteries, unless product damage

has occurred due to a defect in materials or workmanship; (iii) damage caused by accident, abuse, misuse,

water, flood, fire, or other acts of nature or external causes; (iv) damage caused by service performed by

anyone who is not an authorized service provider of Garmin; or (v) damage to a product that has been

modified or altered without the written permission of Garmin. In addition, Garmin reserves the right to

refuse warranty claims against products or services that are obtained and/or used in contravention of the

laws of any country.

THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF

ALL OTHER WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING ANY

LIABILITY ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A

PARTICULAR PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU

SPECIFIC LEGAL RIGHTS, WHICH MAY VARY FROM STATE TO STATE.

IN NO EVENT SHALL GARMIN BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR

CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE OR

INABILITY TO USE THE PRODUCT OR FROM DEFECTS IN THE PRODUCT. SOME STATES DO

NOT ALLOW THE EXCLUSION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE

ABOVE LIMITATIONS MAY NOT APPLY TO YOU.

Garmin retains the exclusive right to repair or replace (with a new or newly-overhauled replacement

product) the product or software or offer a full refund of the purchase price at its sole discretion. SUCH

REMEDY SHALL BE YOUR SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF

WARRANTY.

Online Auction Purchases: Products purchased through online auctions are not eligible for warranty

coverage. Online auction confirmations are not accepted for warranty verification. To obtain warranty

service, an original or copy of the sales receipt from the original retailer is required. Garmin will not

replace missing components from any package purchased through an online auction.

International Purchases: A separate warranty may be provided by international distributors for devices

purchased outside the United States depending on the country. If applicable, this warranty is provided by

the local in-country distributor and this distributor provides local service for your device. Distributor

warranties are only valid in the area of intended distribution. Devices purchased in the United States or

Canada must be returned to the Garmin service center in the United Kingdom, the United States, Canada,

or Taiwan for service.

Garmin International, Inc. Garmin (Europe) Ltd.

1200 East 151st Street Liberty House, Bulls Copse Road

Olathe, Kansas 66062, U.S.A. Hounsdown Business Park

Phone:[phone] Romsey, SO40 9RB, U.K.

FAX:[phone] Phone:44/ (0) 870.8501241

FAX:44/ (0) 870.850125

GMA 240 Installation Manual 190-00917-01

Page iv Rev. D

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190-00917-01 GMA 240 Installation Manual

Rev. D Page v

TABLE OF CONTENTS

PAR AG RAPH PAGE

Section 1 GENERAL DESCRIPTION .............................................................1-1

1.1 Introduction...................................................................................................................... 1-1

1.2 Equipment Description .................................................................................................... 1-1

1.3 Technical Specifications .................................................................................................. 1-2

1.4 Reference Documents ...................................................................................................... 1-4

Section 2 INSTALLATION OVERVIEW........................................................2-1

2.1 Introduction...................................................................................................................... 2-1

2.2 Installation Materials ....................................................................................................... 2-1

2.3 GMA 240 Wiring, Configuration, and Adjustment Options ........................................... 2-1

2.4 Noise ................................................................................................................................ 2-5

2.5 GMA 240 Mounting ........................................................................................................ 2-6

Section 3 INSTALLATION PROCEDURE.....................................................3-1

3.1 Unpacking Unit................................................................................................................ 3-1

3.2 Electrical Connections ..................................................................................................... 3-1

3.3 Audio Shield Termination ............................................................................................... 3-2

3.4 GMA 240 Installation ...................................................................................................... 3-2

3.5 Post Installation Checkout .............................................................................................. 3-3

3.6 Configuration Adjustments.............................................................................................. 3-4

3.7 Continued Airworthiness ................................................................................................. 3-4

Section 4 SYSTEM INTERCONNECTS..........................................................4-1

4.1 Connector Description ..................................................................................................... 4-1

4.2 Pin List............................................................................................................................. 4-1

4.3 Aircraft Power and Lighting ............................................................................................ 4-4

4.4 Configuration Pins ........................................................................................................... 4-5

4.5 Audio Inputs/Outputs and Mic Keys ............................................................................... 4-6

Appendix A Outline and Installation Drawings .............................................A-1

Appendix B Interconnect Drawings................................................................. B-1

Appendix C Configuration Jumpers Drawing................................................C-1

GMA 240 Installation Manual 190-00917-01

Page vi Rev. D

LIST OF FIGURES

FIGURE PAGE

Section 1 GENERAL DESCRIPTION .............................................................1-1

Figure 1-1. GMA 240 Unit View.......................................................................................... 1-1

Section 2 INSTALLATION OVERVIEW........................................................2-1

Figure 2-1 ESD Caution Logo .............................................................................................. 2-2

Figure 2-2 Access Hole Locations (Top View) .................................................................... 2-4

Figure 2-3 GMA 340 Unit Rack (115-00262-00)................................................................. 2-6

Section 3 INSTALLATION PROCEDURE.....................................................3-1

Figure 3-1 Audio Shield Termination................................................................................... 3-2

Section 4 SYSTEM INTERCONNECTS..........................................................4-1

Figure 4-1 Rear View of Backplate and Rack ...................................................................... 4-1

Figure 4-2 Rear Connectors J2401 & J2402, Viewed from Back of Unit............................ 4-1

Figure 4-3 2.5 mm Plug Used with P2403............................................................................ 4-4

Figure 4-4 Audio Jack Wiring ............................................................................................ 4-10

Appendix A Outline and Installation Drawings .............................................A-1

Figure A-1 GMA 240 Outline Drawing .............................................................................. A-1

Figure A-2 GMA 240 Connector/Rack Assembly Drawing ............................................... A-2

Figure A-3 GMA 240 Recommended Panel Cutout Dimensions........................................ A-3

Appendix B Interconnect Drawings ................................................................B-1

Figure B-1 GMA 240 Interconnect Drawing (page 1 of 3) ..................................................B-1

Figure B-1 GMA 240 Interconnect Drawing (page 2 of 3) ..................................................B-2

Figure B-1 GMA 240 Interconnect Drawing (page 3 of 3) ..................................................B-3

Figure B-2 GMA 240, J2401 & J2402 Connector Layout Drawing ....................................B-4

Appendix C Configuration Jumpers Drawing................................................C-1

Figure C-1 GMA 240 Internal ConfigurationJumper Layout Drawing................................C-1

190-00917-01 GMA 240 Installation Manual

Rev. D Page vii

LIST OF TABLES

TABLE PAGE

Section 1 GENERAL DESCRIPTION .............................................................1-1

Table 1-1 Physical Characteristics........................................................................................ 1-2

Table 1-2 Electrical Characteristics...................................................................................... 1-3

Table 1-3 Power Requirements............................................................................................. 1-4

Table 1-4 Reference Documents........................................................................................... 1-4

Section 2 INSTALLATION OVERVIEW........................................................2-1

Table 2-1 .............................................................................................................................. 2-1

Section 3 INSTALLATION PROCEDURE.....................................................3-1

Table 3-1 Pin Contact Part Numbers .................................................................................... 3-1

Table 3-2 Recommended Crimp Tools................................................................................. 3-1

Section 4 SYSTEM INTERCONNECTS..........................................................4-1

Table 4-1 J2401 Pin Assignments ........................................................................................ 4-1

Table 4-2 J2402 Pin Assignments ........................................................................................ 4-3

Table 4-3 P2403 Connector .................................................................................................. 4-4

Table 4-4 Aircraft Power ...................................................................................................... 4-4

Table 4-5 Lighting Bus .........................................................................................................4-5

Table 4-6 External Configuration Pins ................................................................................. 4-5

Table 4-7 Mic Audio Inputs and Mic Keys .......................................................................... 4-6

Table 4-8 Intercom Key Inputs............................................................................................. 4-6

Table 4-9 COM Audion and Mic Keys ................................................................................ 4-7

Table 4-10 Alert Audio I/O .................................................................................................. 4-7

Table 4-11 AUX and NAV Audio Inputs............................................................................. 4-7

Table 4-12 Failsafe Warning Audio ..................................................................................... 4-8

Table 4-13 Music Inputs ....................................................................................................... 4-8

Table 4-14 Tel Audio I/O ..................................................................................................... 4-8

Table 4-15 Headset Outputs ................................................................................................. 4-9

Table 4-16 COM Swap ....................................................................................................... 4-10

GMA 240 Installation Manual 190-00917-01

Page viii Rev. D

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190-00917-01 GMA 240 Installation Manual

Rev. D Page 1-1

1 GENERAL DESCRIPTION

1.1 Introduction

This manual provides the installation instructions for the Garmin GMA 240 Audio Panel. Reference to

GMA 240 throughout this manual refers to all versions of the unit. Information pertaining to the

maintenance of the unit can be found in the GMA 240 Maintenance Manual, P/N 190-00917-02.

Information pertaining to the operation of the unit can be found in the GMA 240 Pilot's Guide, P/N

190-00917-00.

1.2 Equipment Description

The Garmin GMA 240 Audio Panel is not a TSO-certified product and has received no FAA approval or

endorsement.

The GMA 240 meets the needs of aircraft owners and operators who require reliability and versatility in

the essential audio switching function. LED-illuminated push-button simplicity and intuitive panel layout

allow audio selection of both NAV and COM audio. Large, single-button activation of the COM

microphone and audio for two COM transceivers simplifies cockpit workload. Photocell dimming

circuitry automatically adjusts the brightness of the annunciators to a level appropriate for ambient cockpit

light. The brightness of the backlighting is controlled by the aircraft lighting bus. A fail-safe circuit

connects the pilot's headset and microphone directly to COM1 and a fail-safe warning audio input in the

event that power is interrupted or the unit is turned off.

Additionally, the GMA 240 includes a four-position intercom (ICS) with electronic cabin noise de-

emphasis, two stereo music inputs, and independent pilot and copilot/passenger volume controls. To

further simplify the cockpit workload, the intercom provides for pilot isolation. One hundred percent solid

state circuitry and extensive use of surface mount technology are employed.

Figure 1-1. GMA 240 Unit View

P ILO T COPILOT

MUTE

MON

SQ

OFF/

VOL

SQ

VOL

PULL

MUSIC

VOL

TEL

GMA 240

PILOT

IS O

MUTE MUS IC

MUS IC

IC S

RADIO

NAV1 NAV2 AUX1 AUX2

COM1

MIC

COM1

COM2

COM2

MIC

TEL

1

1-2

1

2

GMA 240 Installation Manual 190-00917-01

Page 1-2 Rev. D

1.2.1 Features Summary

• User-friendly, intuitive front panel layout

• LEDs indicate selected function

• Four position intercom: pilot, copilot, two passengers

• Two stereo headset amplifiers: one for pilot, one for copilot/passengers

• Two differential stereo music source inputs

• Front panel music volume control, source selection, and master music on/off switch

• Front panel controls for music muting by intercom and selected radios

• Two selectable intercom operational modes

• Selectable aural pushbutton annunciation (beep)

• Independent pilot, copilot/passenger intercom volume and squelch controls

• Individual VOX circuits for each of four (4) mic inputs

• Automatic selection of COM audio source when corresponding mic is selected

• Memory of explicitly selected COM audio source(s) when changing COM mic selection

• MASQ™ Processing with configurable mute threshold

• COM swap function

• PTT indication

• Power-off fail-safe to connect Pilot PTT, mic, and Headset to COM 1 if unit is turned off

• Power-off fail-safe warning audio input

• Full duplex Telephone interface

• Front Panel Mini-Jack (MP3 player, cellular phone, etc.)

1.3 Technical Specifications

1.3.1 Physical Characteristics

Table 1-1 Physical Characteristics

Characteristic Specification

Bezel Height 1.30 inches (33 mm)

Bezel Width 6.29 inches (159.77 mm)

Rack Height (Dimple to Dimple) 1.33 inches (34 mm)

Rack Width 6.30 inches (160.02 mm)

Depth Behind Panel with Connectors (measured from face of aircraft

panel to rear of connector backshells)

7.12 inches (181 mm)

GMA 240 Weight (Unit Only) 15.5 oz (440 g)

GMA 240 Weight (Installed with rack and connectors) 24 oz (680 g)

190-00917-01 GMA 240 Installation Manual

Rev. D Page 1-3

1.3.2 Electrical Characteristics

Table 1-2 Electrical Characteristics

Characteristic Specification

Temperature

Range

-20 C to +55 C (operation)

-55 C to +85 C (storage)

Altitude 55,000 Feet

Audio Panel

Functions

Dedicated Transceiver inputs: 3 (including TEL)

Dedicated Receiver inputs: 4 (all independently selectable)

Alert (unswitched) inputs: 3 (each with configurable volume)

Input impedance: 500 Ω

Input isolation: 60 dB minimum

Alert/Receiver/Transceiver bandwidth: 100 Hz to 6.5 kHz

Special functions: Fail-safe operation

MASQ™ processing (Master Avionics Squelch)

Configurable button push aural annunciation

Intercom Functions

Positions: 4 (pilot, copilot, 2 passengers)

Volume controls: 3 (pilot, copilot/passengers, music)

VOX level controls: 2 (pilot, copilot/passengers)

VOX circuits: 4 (one per mic input)

Microphone input impedance: 450 Ω (compatible with 150 to 600 Ω mics)

Microphone bias voltage: about 10 Vdc delivered through 450 Ω

Microphone response: 9-pole characteristic cabin noise de-emphasis

Intercom isolation modes: 2 - all, pilot (or configure for all, crew)

Telephone interfaces: 1 full-duplex (use LRU pins or front jack)

Headphone

Outputs

Output amplifiers: 2 stereo (pilot, copilot/passengers)

Fidelity: Load Power Distortion (typ.)

150 Ω 50 mW <0.03% THD+N

150 Ω 100 mW <0.07% THD+N

50 Ω 150 mW <0.07% THD+N

50 Ω 300 mW <0.10% THD+N

Compatible with higher headphone impedances, those shown are for worst-case

distortion and bandwidth