Page 2 - Garmin Ltd. or its subsidiaries; RECORD OF REVISIONS; Revision Revision; Initial
Page A GMA 240 Installation 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 reproduced, copied, transmitted, disseminated, downloaded or stored in any storage medium, for any purpose wi...
Page 3 - INFORMATION SUBJECT TO EXPORT CONTROL LAWS; Section Page
GMA 240 Installation 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 ("EAR") issued by the United States Department of Commerce (15 CFR, Chapter VII, Subchapter C)...
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Page ii GMA 240 Installation Manual Revision A 190-00917-01 This page intentionally left blank
Page 5 - TABLE OF CONTENTS; PAGE
GMA 240 Installation Manual Page iii 190-00917-01 Revision A TABLE OF CONTENTS PARAGRAPH PAGE 1 GENERAL DESCRIPTION .............................................................................................................. 1-1 1.1 Introduction........................................................
Page 6 - PARAGRAPH
Page iv GMA 240 Installation Manual Revision A 190-00917-01 PARAGRAPH PAGE APPENDIX A OUTLINE AND INSTALLATION DRAWINGS.......................................................... A-1 APPENDIX B INTERCONNECT DRAWINGS .................................................................................... ...
Page 7 - LIST OF ILLUSTRATIONS; LIST OF TABLES
GMA 240 Installation 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 8 - GMA 240 HARDWARE MOD LEVEL HISTORY
Page vi GMA 240 Installation Manual Revision A 190-00917-01 GMA 240 HARDWARE MOD LEVEL HISTORY The following table identifies hardware m o d i f i c a t i o n ( M o d ) L e v e l s f o r t h e G M A 2 4 0 A u d i o P a n e l . Mod Levels are listed with the associated service bulletin number, servic...
Page 9 - GMA 240 Installation Manual; GENERAL; . 1 I n t r o d u c t i o n
GMA 240 Installation Manual Page 1-1 190-00917-01 Rev. A 1 GENERAL DESCRIPTION 1 . 1 I n t r o d u c t i o n 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 t...
Page 10 - Summary; T e c h n i c a l S p e c i f i c a t i o n s; Physical Characteristics; Characteristic; Bezel Height
Page 1-2 GMA 240 Installation 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, copilot, two passengers • Two stereo headset amplifiers: one for pilot, one for copilot/passengers • Two di...
Page 11 - Electrical Characteristics
GMA 240 Installation 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) Altitude 55,000 Feet Audio Panel Functions Dedicated Transceiver inputs: 3 (including TEL) Dedicated Re...
Page 12 - Power Requirements
Page 1-4 GMA 240 Installation 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 vol...
Page 13 - L i m i t e d W a r r a n t y; Liberty House, Bulls Copse Road
GMA 240 Installation Manual Page 1-5 190-00917-01 Rev. A 1 . 5 L i m i t e d W a r r a n t y This Garmin product is warranted to be free from defects in materials or workmanship for one year from the date of purchase. Within this period, Garmin will at its sole option, repair or replace any componen...
Page 14 - Blank Page
Page 1-6 GMA 240 Installation Manual Rev. A 190-00917-01 Blank Page
Page 15 - Available; Connector Kit, GMA 340; Additional Equipment Required
GMA 240 Installation Manual Page 2-1 190-00917-01 Rev. A 2 I N S T A L L A T I O N O V E R V I E W 2 . 1 I n t r o d u c t i o n This section provides the necessary information for the installation and checkout of the GMA 240 Audio Panel. Installation of the GMA 240 will differ according to equipmen...
Page 16 - Internal Configuration Jumpers; resistor of 0603 size. Refer to Appendix C for; Component Name Default
Page 2-2 GMA 240 Installation Manual Rev. A 190-00917-01 2.3.1 Internal Configuration Jumpers The following internal configuration adjustments may be made by removing or replacing jumpers on the PCB. The jumper positions are designed to accept a 0 Ω resistor of 0603 size. Refer to Appendix C for com...
Page 17 - VOLUME/MUTE Configuration Adjustments
GMA 240 Installation 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. Default RA...
Page 18 - Hardwire Configuration Option
Page 2-4 GMA 240 Installation 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 externally wiring pins to aircraft chassis. When change of operation is desired during flight, these can optio...
Page 20 - G M A 2 4 0 M o u n t i n g; NOTE; Rear support is recommended to ensure a sturdy mount.
Page 2-6 GMA 240 Installation Manual Rev. A 190-00917-01 2 . 5 G M A 2 4 0 M o u n t i n g 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). The...
Page 21 - INSTALLATION; . 1 U n p a c k i n g; AWG; Manufacturer Hand; Positioner; Extraction Tool; ITT Cannon
GMA 240 Installation Manual Page 3-1 190-00917-01 Rev. A 3 INSTALLATION PROCEDURE 3 . 1 U n p a c k i n g U n i t Carefully unpack the equipment and make a visual inspection of the unit for evidence of damage incurred during shipment. If the unit is damaged, notify the carrier and file a claim. To j...
Page 22 - A u d i o S h i e l d T e r m i n a t i o n; G M A 2 4 0 I n s t a l l a t i o n
Page 3-2 GMA 240 Installation Manual Rev. A 190-00917-01 3 . 3 A u d i o S h i e l d T e r m i n a t i o n 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 shields daisy chained and terminated using a lug attached...
Page 23 - P o s t I n s t a l l a t i o n C h e c k o u t; CAUTION; Turn the unit back on to continue testing.; Transceiver Operational Check; Stereo headsets are recommended if stereo jacks are installed.
GMA 240 Installation Manual Page 3-3 190-00917-01 Rev. A 3 . 5 P o s t I n s t a l l a t i o n C h e c k o u t CAUTION Check wiring connections for errors before inserting the GMA 240 into the rack. Incorrect wiring could cause internal component damage. An in-aircraft checkout may be performed in t...
Page 24 - Plug in headsets at each ICS position.; . 6 C O N F I G U R A T I O N
Page 3-4 GMA 240 Installation Manual Rev. A 190-00917-01 2. Plug in headsets at each ICS position. NOTE For helicopter operation using a two-stage 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...
Page 25 - SYSTEM INTERCONNECTS; Connector Description; Figure 4-1. Rear View of Backplate and Rack; Pin List
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 J2402 which are oriented as shown in Figure 4-1. J2401 J2402 Figure 4-1. Rear View of Backplate and Rac...
Page 26 - T a b l e 4 - 1 . J 2 4 0 1 P i n A s s i g n m e n t s
Page 4-2 GMA 240 Installation Manual Rev. A 190-00917-01 4.2.1 P2401 Connector T a b l e 4 - 1 . J 2 4 0 1 P i n A s s i g n m e n t s Pin Pin Name I/O 1 RESERVED -- 2 RESERVED -- 3 TEL AUDIO IN HI IN 4 TEL AUDIO LO -- 5 TEL MIC AUDIO OUT HI OUT 6 RESERVED -- 7 AUX2 AUDIO IN HI IN 8 AUX2 AUDIO IN LO...
Page 27 - T a b l e 4 - 2 . J 2 4 0 2 P i n A s s i g n m e n t s
GMA 240 Installation Manual Page 4-3 190-00917-01 Rev. A 4.2.2 J2402 Connector T a b l e 4 - 2 . J 2 4 0 2 P i n A s s i g n m e n t s Pin Pin Name I/O 1 PILOT HEADSET AUDIO OUT LO -- 2 COPILOT HEADSET AUDIO OUT LO -- 3 COPILOT HEADSET AUDIO OUT LEFT OUT 4 COPILOT HEADSET AUDIO OUT RIGHT OUT 5 LIGHT...
Page 28 - Aircraft Power and Lighting
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 -- 4.3 Aircraft ...
Page 29 - Configuration Pins; External Configuration Pins; ISO
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 the configuration of the installation as described. Pin Connector Pin Name Description 16 P2401 MASQ INHIBIT* IN Ground to disable Master Avionic...
Page 30 - Audio Inputs/Outputs and Mic Keys
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 33 P2402 COPILOT MIC KEY* IN Enables respective MIC audio into the selected transceiver unit IN 33 P...
Page 33 - APPENDIX A OUTLINE AND INSTALLATION DRAWINGS
APPENDIX A OUTLINE AND INSTALLATION DRAWINGS GMA 240 Installation Manual Page A-1 (Page A-2 blank) 190-00917-01 Rev A Figure A-1. GMA 240 Outline Drawing
Page 35 - Figure A-3. GMA 240 Recommended Panel Cutout Dimensions
APPENDIX A OUTLINE AND INSTALLATION DRAWINGS GMA 240 Installation Manual Page A-5 (Page A-6 blank) 190-00917-01 Rev A Figure A-3. GMA 240 Recommended Panel Cutout Dimensions
Page 36 - APPENDIX B INTERCONNECT DRAWINGS
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 Interconnect Drawing (page 1 of 3)
Page 40 - APPENDIX C CONFIGURATION JUMPERS DRAWING; Top of Main Board; Figure C-1. GMA 240, Internal Configuration Jumper Layout Drawing
APPENDIX C CONFIGURATION JUMPERS DRAWING GMA 240 Installation Manual Page C-1 (Page C-2 blank) 190-00917-01 Rev A Top of Main Board Bottom of Main Board Figure C-1. GMA 240, Internal Configuration Jumper Layout Drawing
