Instruction/ maintenance manual of the product GMA 240 Garmin
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190-00917-01 June, 2008 Revision A GMA 240 Installation Manual P I LO T CO PI L OT MUT E MO N SQ OFF/ VOL SQ VOL PULL MUSIC VOL TE L GMA 240 PI L OT IS O MUT E MUS IC MUS IC IC S RA D I O NA V1 NA V2 .
Page A GMA 240 Installati on Manual Rev. A 190-00917-01 © Copyright 2008 Garmin Ltd. or its subsidiaries All Rights Reserved Except as expressly provided herein, no part of this manual may be reprodu.
GMA 240 Installati on Manual Page i 190-00917-01 Revision A INFORMATION SUBJECT TO EXPORT CONTROL LAWS This document may contain information which is subject to the Export Administration Regulations (.
Page ii GMA 240 Installation M anual Revision A 190-00917-01 This page intentionally left blank.
GMA 240 Installation Manual Page iii 190-00917-01 Revision A TABLE OF CONTENTS PARAGRAPH PAGE 1 GENERAL D ESCRIPTION .......................................................................................................... .... 1-1 1.1 Introduction..
Page iv GMA 240 Installat ion Manual Revision A 190-00917-01 PARAGRAPH PAGE APPENDIX A OUTLINE AND INSTALLATION DRAW INGS .......................................................... A-1 APPENDIX B INTERCONNE CT DRAWINGS ................................
GMA 240 Installati on Manual Page v 190-00917-01 Revision A LIST OF ILLUSTRATIONS FIGURE PAGE 1-1 GMA 240 Unit View .......................................................................................................... ............... 1-1 2-1 GMA 240 Unit Rack (115-00262-00) .
Page vi GMA 240 Installat ion Manual Revision A 190-00917-01 GMA 240 HARDWARE MOD LEVEL HISTORY T h e f o l l o w i n g t a b l e i d e n t i f i e s h a r d w a r e modification (Mod) Levels for the GMA 240 Audio P a n e l .
GMA 240 Installati on Manual Page 1-1 190-00917-01 Rev. A 1 GENERAL DESCRIPTION 1.1 Introduction This manual provides the installation instructions fo r the Garmin GMA 240 Audio Panel. Reference to GMA 240 throughout this manual refers to all versions of the unit.
Page 1-2 GMA 240 Installati on Manual Rev. A 190-00917-01 1.2.1 Features Summary • User-friendly, intuitive front panel layout • LEDs indicate selected function • Four position intercom: pilot, .
GMA 240 Installati on Manual Page 1-3 190-00917-01 Rev. A 1.3.2 Electrical Characteristics Characteristic Specification Temperature Range -20 ° C to +55 ° C (operation) -55 ° C to +85 ° C (storage.
Page 1-4 GMA 240 Installati on Manual Rev. A 190-00917-01 Characteristic Specification Music Functions Music inputs (stereo): 2 Music input impedance: 600 Ω (differential) Music gain: -20dB @ min volume, +26dB @ max. volume (typ.) Music input level:<200 mVrms for full power* output @ max music volume knob position (typ.
GMA 240 Installati on Manual Page 1-5 190-00917-01 Rev. A 1.5 Limited Warranty This Garmin product is warranted to be free from defects in m aterials or workmanship for one year from the date of purchase. Within this period, Garmin w ill at its sole option, repair or replace any components that fail in normal use.
Page 1-6 GMA 240 Installati on Manual Rev. A 190-00917-01 Blank Page.
GMA 240 Installati on Manual Page 2-1 190-00917-01 Rev. A 2 INSTALLATION OVERVIEW 2.1 Introduction This section provides the necessary information for th e installation and checkout of the GMA 240 Audio Panel. Installation of the GMA 240 will differ accord ing to equipment location and other factors.
Page 2-2 GMA 240 Installati on Manual Rev. A 190-00917-01 2.3.1 Internal Configuration Jumpers The following internal configuration adjustments ma y be made by removing or replacing jumpers on the PCB. The jumper positions are designed to accept a 0 Ω resistor of 0603 size.
GMA 240 Installati on Manual Page 2-3 190-00917-01 Rev. A Component Name Default Description R0314 Only Primary COM mutes MUSIC Empty If a jumper is supplied in this position, the RADIO button will mute music only when the Primary COM (the COM selected for transmission) is receiving audio.
Page 2-4 GMA 240 Installati on Manual Rev. A 190-00917-01 Figure 2-1. Access Hole Location (Top View) 2.3.3 Hardwire Configuration Option The following configuration options are available by ex ternally wiring pins to aircraft chassis.
GMA 240 Installati on Manual Page 2-5 190-00917-01 Rev. A BUTTON PRESS TONE ENABLE: This input enables an audible tone to be heard when a button press is detected.
Page 2-6 GMA 240 Installati on Manual Rev. A 190-00917-01 2.5 GMA 240 Mounting The GMA 240 mounting surface must be capable of providing structural support and electrical bond to the aircraft to minimize radiated EMI and provide protection from High-Intensity Radiation Fields (HIRF).
GMA 240 Installati on Manual Page 3-1 190-00917-01 Rev. A 3 INST ALLA TION PR OCEDURE 3.1 Unpacking Unit Carefully unpack the equipment and make a visual inspection of the unit for evidence of dama ge incurred during shipment. If the unit is damaged, notify the carri er and file a claim .
Page 3-2 GMA 240 Installati on Manual Rev. A 190-00917-01 3.3 Audio Shield Termination The audio shield wires should be terminated at the rear of the unit to the screws between J2401 and J2402 as shown in Figure 3-1. Audio shiel ds d aisy cha ined and termi nate d usin g a lu g attached to eit her of the se screws .
GMA 240 Installati on Manual Page 3-3 190-00917-01 Rev. A 3.5 Post Installation Checkout CAUTION Check wiring connections for errors before inserting the GMA 240 into the rack.
Page 3-4 GMA 240 Installati on Manual Rev. A 190-00917-01 2. Plug in headsets at each ICS position. NOTE For helicopter operation using a two-st age Intercom/PTT switch, prior to using the keyed-intercom mode, the VOX level should be set by adjusting the VOX knob while the first detent is actuated and held.
GMA 240 Installation Manual Page 4-1 190-00917-01 Rev. A 4 SYSTEM INTERCONNECTS 4.1 Connector Description The GMA 240 has two 44-pin connectors located at the rear of the unit designated J2401 and J2 402 which are oriented as shown in Figure 4-1. J2401 J2402 Figure 4-1.
Page 4-2 GMA 240 Installation Manual Rev. A 190-00917-01 4.2.1 P2401 Connector Table 4-1. J2401 Pin Assignment s Pin Pin Name I/O 1 RESERVED -- 2 RESERVED -- 3 TEL AUDIO I N HI IN 4 TEL AUDIO LO -- 5 .
GMA 240 Installation Manual Page 4-3 190-00917-01 Rev. A 4.2.2 J2402 Connector Table 4-2. J2402 Pin Assignment s Pin Pin Name I/O 1 PILOT HEADSET AUDIO OUT LO -- 2 COPILOT HE ADSET AUDIO OUT LO -- 3 C.
Page 4-4 GMA 240 Installation Manual Rev. A 190-00917-01 4.2.3 P2403 Connector (front panel 2.5 mm mini-jack) Figure 4-2. 2.5 mm plug used with P2403 Pin Pin Name I/O TIP MUSIC 1 LEFT IN/TEL MIC OUT HI IN/OUT RING MUSIC 1 RIGHT IN/TEL AUDIO IN HI IN SLEEVE MUSIC 1 LO IN/TEL AUDIO LO -- 4.
GMA 240 Installation Manual Page 4-5 190-00917-01 Rev. A 4.4 Configuration Pins 4.4.1 External Configuration Pins The following pins may be used to change th e configuration of the installation as described. Pin Connector Pin Name Description 16 P2401 MASQ INHIBIT* IN Ground to disable Master Avionics Squelch circuitry.
Page 4-6 GMA 240 Installation Manual Rev. A 190-00917-01 4.5 Audio Inputs/Outputs and Mic Keys 4.5.1 Mic Audio Inputs and Mic Keys Pin Connector Pin Name Description I/O 34 P2401 PILOT MIC KEY* IN IN .
GMA 240 Installation Manual Page 4-7 190-00917-01 Rev. A 4.5.4 Alert Audio I/O Pin Connector Pin Name Description I/O 31 P2401 ALERT 1 AUDIO IN HI Alert 1 Audio Input IN 32 P2401 ALERT 1 AUDIO IN LO G.
Page 4-8 GMA 240 Installation Manual Rev. A 190-00917-01 4.5.8 Tel Audio I/O Pin Connector Pin Name Description I/O 3 P2401 TEL AUDIO IN HI Telephone Audio Input IN 4 P2401 TEL AUDIO LO Ground Reference for Telephone -- 5 P2401 TEL MIC AUDIO OUT HI TEL MIC Audio Output OUT 4.
APPENDIX A OUTLINE AND INSTALLATION DRAWINGS GMA 240 Installation Manual Page A-1 (Page A-2 b lank) 190-00917-01 Rev A Figure A-1. GMA 240 Outline Drawing.
APPENDIX A OUTLINE AND INSTALLATION DRAWINGS GMA 240 Installation Manual Page A-3 (Page A-4 b lank) 190-00917-01 Rev A Figure A-2. GMA 240 Connect or/Rack Assembly Drawing.
APPENDIX A OUTLINE AND INSTALLATION DRAWINGS GMA 240 Installation Manual Page A-5 (Page A-6 b lank) 190-00917-01 Rev A Figure A-3. GMA 240 Recomm ended Panel Cutout Dimensions.
APPENDIX B INTERCONNECT DRAWINGS GMA 240 Installation Manual Page B-1 (Page B-2 blank) 190-00917-01 Rev A Figure B-1. GMA 240 Inter connect Drawing (page 1 of 3).
APPENDIX B INTERCONNECT DRAWINGS GMA 240 Installation Manual Page B-3 (Page B-4 blank) 190-00917-01 Rev A Figure B-1. GMA 240 Inter connect Drawing (page 2 of 3).
APPENDIX B INTERCONNECT DRAWINGS GMA 240 Installation Manual Page B-5 (Page B-6 blank) 190-00917-01 Rev A Figure B-1. GMA 240 Inter connect Drawing (page 3 of 3).
APPENDIX B INTERCONNECT DRAWINGS GMA 240 Installation Manual Page B-7 (Page B-8 blank) 190-00917-01 Rev A PILOT ISO MUSIC * RETURN RESER VED MUTE* ON COM T X IN ALERT 3 AUDI O IN HI RESER VED FAILSAFE.
APPENDIX C CONFIGURATION JUMPERS DRAWING GMA 240 Installation Manual Page C-1 (Page C-2 blank) 190-00917-01 Rev A T op of Main Board Bottom of Main Board Figure C-1.
An important point after buying a device Garmin GMA 240 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Garmin GMA 240 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Garmin GMA 240 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Garmin GMA 240 you will learn all the available features of the product, as well as information on its operation. The information that you get Garmin GMA 240 will certainly help you make a decision on the purchase.
If you already are a holder of Garmin GMA 240, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Garmin GMA 240.
However, one of the most important roles played by the user manual is to help in solving problems with Garmin GMA 240. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Garmin GMA 240 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
