Garmin GMA 240 installation manual Introduction, Equipment Description

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1 GENERAL DESCRIPTION

1.1Introduction

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.

1.2Equipment 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. 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

GMA 240 Installation Manual

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190-00917-01

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Contents GMA Description Record of RevisionsSection Range Information Subject to Export Control LawsThis page intentionally left blank Table of Contents Appendix a Outline and Installation Drawings List of Illustrations GMA 240 Hardware MOD Level History Equipment Description IntroductionCharacteristic Specification Technical SpecificationsFeatures Summary Physical CharacteristicsElectrical Characteristics Power Requirements Reference DocumentsPart Number Document Limited Warranty Blank GMA 240 Wiring, Configuration, and Adjustment Options Installation MaterialsGarmin P/N Equipment AvailableInternal Configuration Jumpers Component Name Default DescriptionMusic VOLUME/MUTE Configuration AdjustmentsHardwire Configuration Option Access Hole Location Top ViewNoise GMA 340 Unit Rack GMA 240 MountingUnpacking Unit Electrical ConnectionsPositioner Audio Shield Termination GMA 240 InstallationLamp Test Post Installation CheckoutFailsafe Operation Check Transceiver Operational CheckMusic System Check Aircraft Receivers CheckPin List Connector Description1 P2401 Connector J2401 Pin Assignments Pin Name 2 J2402 Connector J2402 Pin Assignments Pin Name 3 P2403 Connector front panel 2.5 mm mini-jack Aircraft Power and LightingAircraft Power Pin Connector Pin NameConfiguration Pins External Configuration PinsPin Connector Pin Name Description Intercom Key Inputs if configured COM Audio and Mic Keys Pin Connector Pin Name DescriptionAudio Inputs/Outputs and Mic Keys AUX and NAV Audio Inputs Pin Connector Pin Name Description Alert Audio I/O Pin Connector Pin Name DescriptionFailsafe Warning Audio Pin Pin Name DescriptionTel Audio I/O Pin Connector Pin Name Description Headset Outputs Pin Connector Pin Name DescriptionCOM Swap Pin Connector Pin Name Description Appendix a Outline and Installation Drawings Figure A-2. GMA 240 Connector/Rack Assembly Drawing Figure A-3. GMA 240 Recommended Panel Cutout Dimensions Appendix B Interconnect Drawings Figure B-1. GMA 240 Interconnect Drawing page 2 Figure B-1. GMA 240 Interconnect Drawing page 3 GMA240 J2401 Top of Main Board Bottom of Main Board

GMA 240 specifications

The Garmin GMA 240 is a state-of-the-art audio panel designed specifically for aviation applications. This device is known for its advanced features, user-friendly interface, and superior sound quality, making it a popular choice among pilots and aircraft owners. One of the standout characteristics of the GMA 240 is its ability to integrate seamlessly with a variety of communication and navigation systems, enhancing situational awareness and streamlining cockpit operations.

One of the main features of the GMA 240 is its capability to manage multiple audio inputs. The panel provides independent volume controls for the pilot and co-pilot, allowing each to adjust their audio levels according to their preferences. Additionally, the GMA 240 offers a dedicated input for auxiliary devices, such as smartphones or tablet computers, facilitating music playback or calls during flight.

The GMA 240 also incorporates advanced noise reduction technology. This feature minimizes ambient noise interference, ensuring that communication between the crew and air traffic control is crystal clear. The panel is equipped with a digital processing function that enhances audio clarity and reduces background noise, a critical asset in the typically noisy environment of an aircraft cockpit.

Another noteworthy characteristic of the GMA 240 is its intuitive operation. The layout of the controls is logical and straightforward, allowing pilots to adjust settings quickly and efficiently without distraction. This ease of use is crucial, especially during high-pressure situations when pilots need to maintain focus on flying while managing audio communications.

The GMA 240 supports a wide range of aircraft configurations, making it a versatile choice for various aviation needs. It is designed to be compatible with both general aviation and commercial aircraft, further extending its usability in different environments. The panel meets rigorous safety standards, ensuring it can withstand the demands of aviation use.

In terms of installation, the GMA 240 is engineered for easy integration into existing cockpits, requiring minimal modifications. Its compact design and robust build quality ensure durability even in challenging flight conditions.

In summary, the Garmin GMA 240 audio panel stands out for its combination of advanced features, user-friendly design, and high-quality performance. With its excellent noise reduction capabilities, independent audio controls for each crew member, and broad compatibility, it is an essential tool for enhancing communication and safety in the cockpit. This audio panel continues to be a preferred choice for aviation professionals seeking reliability and efficiency.
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