190-00917-01 GMA 240 Installation ManualRev. D Page 2-12 INSTALLATION OVERVIEW2.1 IntroductionThis section provides the necessary information for the installation and checkout of the GMA 240 AudioPanel. Installation of the GMA 240 will differ according to equipment location and other factors. Cablingwill be fabricated by the installing agency to fit these various requirements. The appendices containinterconnect wiring diagrams, mounting dimensions, and information pertaining to installation.2.2 Installation Materials2.2.1 Equipment AvailableGMA 240 Audio Panel, Ship Level Assembly, P/N 010-00735-() includes the following, depending onpart number:2.2.2 Additional Equipment Required• Cables: The installer will fabricate and supply all system cables. Interconnect wiring diagrams aredetailed in Appendix B.• Hardware: #6-32 100° flat head screw (6 ea.) and #6-32 self-locking nut (6 ea.). Hardwarerequired to mount the installation rack is not provided.• Stereo headphone jacks (up to 4), microphone jacks (up to 4), 3.5mm stereo jacks (up to 2).Insulating type jacks or insulating washers should be used for all jacks to isolate them from aircraftchassis.2.3 GMA 240 Wiring, Configuration, and Adjustment OptionsThe GMA 240 has several configuration/adjustment options, consideration of these options should bediscussed with the end user(s) of the aircraft before wiring begins. These configuration/adjustments aredescribed in the following sections:• Wiring options - Section 2.3.1 and Section 4.4.1• Internal configuration jumpers - Section 2.3.1• Volume/Mute adjustments - Section 2.3.2Table 2-1Item Garmin P/NConnector Kit, GMA 340 011-00652-00Rack Backplate, GMA 340 011-00678-00Unit Assembly, GMA 240 011-01988-00Audio Cables, 2.5 mm RA Stereo Plug 011-02079-00Install Rack, GMA 340 115-00262-00