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- GMA 240
- Installation Manual
Garmin GMA 240 Installation Manual
Summary of GMA 240
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190-00917-01 june, 2008 revision a gma 240 installation manual pilo t c opilo t mute mon sq off/ vol sq vol pull music vol te l gma 240 pilot is o mute mus ic mus ic ic s radio nav1 nav2 aux1 aux2 c om1 mic c om1 c om2 c om2 mic tel 1 1-2 1 2.
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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...
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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) and whi...
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Page ii gma 240 installation manual revision a 190-00917-01 this page intentionally left blank.
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Gma 240 installation manual page iii 190-00917-01 revision a table of contents paragraph page 1 general description..............................................................................................................1-1 1.1 introduction..........................................................
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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 .................................................................................... ...
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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) ..........................
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Page vi gma 240 installation manual revision a 190-00917-01 gma 240 hardware mod level history the following table identifies hardware modification (mod) levels for the gma 240 audio panel. Mod levels are listed with the associated service bulletin number, service bulletin date, and the purpose of t...
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Gma 240 installation manual page 1-1 190-00917-01 rev. A 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 mainten...
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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...
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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 receiver...
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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: volume knob position (typ.) 3.5 vrms max music inpu...
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Gma 240 installation manual page 1-5 190-00917-01 rev. A 1.5 limited warranty 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 components that fail in...
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Page 1-6 gma 240 installation manual rev. A 190-00917-01 blank page.
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Gma 240 installation manual page 2-1 190-00917-01 rev. A 2 installation overview 2.1 introduction 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 equipment location and other factors. C...
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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...
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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...
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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...
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Gma 240 installation 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. Mute on com tx: this input configures the audio panel to mute all selected radios (com, nav, aux) except the mic selected com (com select...
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Page 2-6 gma 240 installation 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). The gma 240 is m...
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Gma 240 installation manual page 3-1 190-00917-01 rev. A 3 installation procedure 3.1 unpacking unit 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 justify a clai...
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Page 3-2 gma 240 installation 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 shields daisy chained and terminated using a lug attached to either of these s...
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Gma 240 installation 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. Incorrect wiring could cause internal component damage. An in-aircraft checkout may be performed in the aircraft on the ramp...
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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...
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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...
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Page 4-2 gma 240 installation manual rev. A 190-00917-01 4.2.1 p2401 connector table 4-1. J2401 pin assignments 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 -- 9 com 1 audio in hi...
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Gma 240 installation manual page 4-3 190-00917-01 rev. A 4.2.2 j2402 connector table 4-2. J2402 pin assignments 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 lighting bus 14v lo/28v lo -...
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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 ...
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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...
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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...
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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 ground reference for alert 1 -- 44 p2401 alert 2 audio in hi alert 2 audio input in 15 p2402 alert 3 ...
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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 4.5.9 headset outputs pin ...
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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.
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Appendix a outline and installation drawings gma 240 installation manual page a-3 (page a-4 blank) 190-00917-01 rev a figure a-2. Gma 240 connector/rack assembly drawing.
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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.
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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).
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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 interconnect drawing (page 2 of 3).
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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 interconnect drawing (page 3 of 3).
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Appendix b interconnect drawings gma 240 installation manual page b-7 (page b-8 blank) 190-00917-01 rev a pilot iso music* return reserved mute* on com tx in alert 3 audio in hi reserved failsafe warn audio in hi music 2 in lo pilot iso music* in aircraft ground reserved reserved music 2 in right re...
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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.