Installation Manual
Page 4
... Technical Specifications ...1-2 1.4 Reference Documents ...1-4 1.5 Limited Warranty...1-5 2 INSTALLATION OVERVIEW ...2-1 2.1 Introduction...2-1 2.2 Installation Materials ...2-1 2.3 GMA 240 Wiring, Configuration, and Adjustment Options 2-1 2.4 Noise ...2-5 2.5 GMA 240 Mounting ...2-6 3 INSTALLATION PROCEDURE...3-1 3.1 Unpacking Unit...3-1 3.2 Electrical Connections ...3-1 3.3 Audio Shield Termination ...3-2 3.4 GMA 240 Installation ...3-2 3.5 Post Installation Checkout ...3-3 3.6 Configuration Adjustments...3-4 3.7 Continued Airworthiness ...3-4 4 SYSTEM INTERCONNECTS ...4-1 4.1 Connector...
... Technical Specifications ...1-2 1.4 Reference Documents ...1-4 1.5 Limited Warranty...1-5 2 INSTALLATION OVERVIEW ...2-1 2.1 Introduction...2-1 2.2 Installation Materials ...2-1 2.3 GMA 240 Wiring, Configuration, and Adjustment Options 2-1 2.4 Noise ...2-5 2.5 GMA 240 Mounting ...2-6 3 INSTALLATION PROCEDURE...3-1 3.1 Unpacking Unit...3-1 3.2 Electrical Connections ...3-1 3.3 Audio Shield Termination ...3-2 3.4 GMA 240 Installation ...3-2 3.5 Post Installation Checkout ...3-3 3.6 Configuration Adjustments...3-4 3.7 Continued Airworthiness ...3-4 4 SYSTEM INTERCONNECTS ...4-1 4.1 Connector...
Installation Manual
Page 13
... options, consideration of the aircraft before wiring begins. Section 2.3.2 GMA 240 Installation Manual 190-00917-01 Page 2-1 Rev. These configuration/adjustments are detailed in the following , depending on part number: Item Connector Kit, GMA 340 Rack Backplate, GMA 340 Unit Assembly, GMA 240 Audio Cables, 2.5 mm RA Stereo Plug Install Rack, GMA 340 Garmin P/N 011-00652-00 011-00678...
... options, consideration of the aircraft before wiring begins. Section 2.3.2 GMA 240 Installation Manual 190-00917-01 Page 2-1 Rev. These configuration/adjustments are detailed in the following , depending on part number: Item Connector Kit, GMA 340 Rack Backplate, GMA 340 Unit Assembly, GMA 240 Audio Cables, 2.5 mm RA Stereo Plug Install Rack, GMA 340 Garmin P/N 011-00652-00 011-00678...
Installation Manual
Page 15
.... Alert 2 Volume 3. Reserved Reserved Reserved Reserved Reserved 2.3.2 VOLUME/MUTE Configuration Adjustments The following adjustments can be made through the top cover. GMA 240 Installation Manual 190-00917-01 Page 2-3 Rev. B When this configuration is accidentally forced against unintended components or circuit board paths. Alert 1 Volume...cover of the access holes. CW adjustment increases the levels for volume inputs and for the mute threshold for information on wiring intercom keys. If a jumper is supplied in this position, the intercom system (ICS) will mute music only when ...
.... Alert 2 Volume 3. Reserved Reserved Reserved Reserved Reserved 2.3.2 VOLUME/MUTE Configuration Adjustments The following adjustments can be made through the top cover. GMA 240 Installation Manual 190-00917-01 Page 2-3 Rev. B When this configuration is accidentally forced against unintended components or circuit board paths. Alert 1 Volume...cover of the access holes. CW adjustment increases the levels for volume inputs and for the mute threshold for information on wiring intercom keys. If a jumper is supplied in this position, the intercom system (ICS) will mute music only when ...
Installation Manual
Page 16
...and pin details for crew intercom isolation in place of pilot isolation. This option is selected, the copilot's headphone jack must be wired in reach of operation is configured). Figure 2-1. MASQ™ INHIBIT: The Master Avionics SQuelch inhibit configuration option allows selected avionics audio... the passengers. Normally, the isolated ICS positions do not exceed the MASQ threshold. B GMA 240 Installation Manual 190-00917-01 PILOT ISO MUSIC: This input configures music to be wired to aircraft chassis. When change of the operator. Access Hole Location (Top View) 2.3.3...
...and pin details for crew intercom isolation in place of pilot isolation. This option is selected, the copilot's headphone jack must be wired in reach of operation is configured). Figure 2-1. MASQ™ INHIBIT: The Master Avionics SQuelch inhibit configuration option allows selected avionics audio... the passengers. Normally, the isolated ICS positions do not exceed the MASQ threshold. B GMA 240 Installation Manual 190-00917-01 PILOT ISO MUSIC: This input configures music to be wired to aircraft chassis. When change of the operator. Access Hole Location (Top View) 2.3.3...
Installation Manual
Page 17
...Ground loops are brought together, care must be overstressed for COM transmit. 2.4 Noise Because the audio panel is detected. The wiring diagrams and accompanying notes in potential can also couple into audio system interconnecting cables when they are routed near large AC current... equipment (heaters, solenoids, fans, autopilot servos, etc). Interference can produce an additive effect at one path in the aircraft. GMA 240 Installation Manual 190-00917-01 Page 2-5 Rev. These large currents create differences in ground potential between the various equipment operating in ...
...Ground loops are brought together, care must be overstressed for COM transmit. 2.4 Noise Because the audio panel is detected. The wiring diagrams and accompanying notes in potential can also couple into audio system interconnecting cables when they are routed near large AC current... equipment (heaters, solenoids, fans, autopilot servos, etc). Interference can produce an additive effect at one path in the aircraft. GMA 240 Installation Manual 190-00917-01 Page 2-5 Rev. These large currents create differences in ground potential between the various equipment operating in ...
Installation Manual
Page 19
...also be used when reassembling the connector. 3. Retain the original shipping containers for errors before inserting the GMA 240 into the rack. Section 4 defines the electrical characteristics of the wire. To justify a claim, save the original shipping container and all input and output signals. Extracting the...expanded wire barrel be cut off from the face of the connector when using 16 AWG wire, contact Garmin for evidence of damage incurred during shipment. For applications using an extractor due to the GMA 240 are supplied in the connector kit (P/N 011-00652-00). GMA 240 ...
...also be used when reassembling the connector. 3. Retain the original shipping containers for errors before inserting the GMA 240 into the rack. Section 4 defines the electrical characteristics of the wire. To justify a claim, save the original shipping container and all input and output signals. Extracting the...expanded wire barrel be cut off from the face of the connector when using 16 AWG wire, contact Garmin for evidence of damage incurred during shipment. For applications using an extractor due to the GMA 240 are supplied in the connector kit (P/N 011-00652-00). GMA 240 ...
Installation Manual
Page 20
...the unit should be terminated at the rear of resistance. 5. B GMA 240 Installation Manual 190-00917-01 Install the rack assembly according to Tables 4-1, 4-2; 3.3 Audio Shield Termination The audio shield wires should be provided. 2. Assemble the connector/rack kit according to the ...dimensions given in Figure 3-1. and Figures B-1 and B-2. Audio Shield Termination 3.4 GMA 240 Installation NOTE Avoid installing the unit near heat sources....
...the unit should be terminated at the rear of resistance. 5. B GMA 240 Installation Manual 190-00917-01 Install the rack assembly according to Tables 4-1, 4-2; 3.3 Audio Shield Termination The audio shield wires should be provided. 2. Assemble the connector/rack kit according to the ...dimensions given in Figure 3-1. and Figures B-1 and B-2. Audio Shield Termination 3.4 GMA 240 Installation NOTE Avoid installing the unit near heat sources....
Installation Manual
Page 21
... headset is used in a stereo jack, the audio panel's right channel output is optimized for errors before inserting the GMA 240 into the rack. An in systems with known good microphone, headset, and avionics receivers. 3.5.1 Lamp Test 1. B Apply...wiring connections for low-power operation in -aircraft checkout may cause the internal power input fuse to continue testing. 3.5.3 Transceiver Operational Check 1. If installed, check that disconnects the audio panel's right channel output from the jack's ring contact when in a mono headset. 1. Turn the unit off .] GMA 240...
... headset is used in a stereo jack, the audio panel's right channel output is optimized for errors before inserting the GMA 240 into the rack. An in systems with known good microphone, headset, and avionics receivers. 3.5.1 Lamp Test 1. B Apply...wiring connections for low-power operation in -aircraft checkout may cause the internal power input fuse to continue testing. 3.5.3 Transceiver Operational Check 1. If installed, check that disconnects the audio panel's right channel output from the jack's ring contact when in a mono headset. 1. Turn the unit off .] GMA 240...
Installation Manual
Page 22
...Music System Check 1. Periodic maintenance of volume and squelch controls. 3.5.5 Aircraft Receivers Check 1. B GMA 240 Installation Manual 190-00917-01 2. Pull out on . 5. Connect a stereo music source to the GMA 240 Maintenance Manual (Garmin P/N 190-00917-02) as the music source and MUSIC LED is actuated and held. 3. ...and the music volume knob is on. Verify that the wiring harness does not touch any moving part. Check Pilot and Copilot ICS positions for this product under 14 CFR Part 21 since the GMA 240 has received no FAA approval or endorsement. Perform a flight...
...Music System Check 1. Periodic maintenance of volume and squelch controls. 3.5.5 Aircraft Receivers Check 1. B GMA 240 Installation Manual 190-00917-01 2. Pull out on . 5. Connect a stereo music source to the GMA 240 Maintenance Manual (Garmin P/N 190-00917-02) as the music source and MUSIC LED is actuated and held. 3. ...and the music volume knob is on. Verify that the wiring harness does not touch any moving part. Check Pilot and Copilot ICS positions for this product under 14 CFR Part 21 since the GMA 240 has received no FAA approval or endorsement. Perform a flight...
Installation Manual
Page 27
... is still heard, IN but not other selected radios during quiet output. 29 P2401 CREW Ground to activate) GMA 240 Installation Manual 190-00917-01 Page 4-5 Rev. The mics are wired as described. 4.4 Configuration Pins 4.4.1 External Configuration Pins The following pins may be used to change the configuration ...transmission (mic-selected COM is selected, the pilot and copilot will hear each other, but will cause alerts and selected radios to be wired in background noise from the passengers. 13 P2402 PILOT ISO Ground to allow Music audio to be heard by the pilot during MUSIC*...
... is still heard, IN but not other selected radios during quiet output. 29 P2401 CREW Ground to activate) GMA 240 Installation Manual 190-00917-01 Page 4-5 Rev. The mics are wired as described. 4.4 Configuration Pins 4.4.1 External Configuration Pins The following pins may be used to change the configuration ...transmission (mic-selected COM is selected, the pilot and copilot will hear each other, but will cause alerts and selected radios to be wired in background noise from the passengers. 13 P2402 PILOT ISO Ground to allow Music audio to be heard by the pilot during MUSIC*...
Installation Manual
Page 30
Passengers may be wired in parallel with the pilot jack to Swap Active COM (COM 1 or COM 2) Return Path for PB Switch -- NOTE For CREW ISO configuration, the copilot's ... IN HI TEL AUDIO LO TEL MIC AUDIO OUT HI Description Telephone Audio Input Ground Reference for wiring convenience and GMA 340 pin compatibility. Separate Passenger headset output pins are internally the same connection. Page 4-8 Rev. B GMA 240 Installation Manual 190-00917-01 NOTE Copilot and Passenger headset outputs are provided for Telephone TEL...
Passengers may be wired in parallel with the pilot jack to Swap Active COM (COM 1 or COM 2) Return Path for PB Switch -- NOTE For CREW ISO configuration, the copilot's ... IN HI TEL AUDIO LO TEL MIC AUDIO OUT HI Description Telephone Audio Input Ground Reference for wiring convenience and GMA 340 pin compatibility. Separate Passenger headset output pins are internally the same connection. Page 4-8 Rev. B GMA 240 Installation Manual 190-00917-01 NOTE Copilot and Passenger headset outputs are provided for Telephone TEL...
Pilot's Guide
Page 3
... OR FROM DEFECTS IN THE PRODUCT. CAUTION: Incorrect aircraft wiring could short the left channel or both channels to you , visit the Garmin Web site at "http:// www.garmin.com" or contact Garmin Customer Service at 800-800-1020. Garmin retains the exclusive right to repair or replace the unit ...or software, or to be free from the date of purchase. If wired incorrectly, fail-safe operation will...
... OR FROM DEFECTS IN THE PRODUCT. CAUTION: Incorrect aircraft wiring could short the left channel or both channels to you , visit the Garmin Web site at "http:// www.garmin.com" or contact Garmin Customer Service at 800-800-1020. Garmin retains the exclusive right to repair or replace the unit ...or software, or to be free from the date of purchase. If wired incorrectly, fail-safe operation will...
Pilot's Guide
Page 7
When wired correctly, the use of stereo headsets is highly recommended. During power-up to two ...always heard on the Pilot headphones. The active COM audio is used at one of the detent to turn OFF. A Garmin GMA 240 Pilot's Guide 7 Transceivers Pressing COM1 MIC or COM2 MIC Key selects the transmitter and receiver audio for microphone use. ... transceiver has been selected for the selected transceiver source. Power ON/OFF The GMA 240 may be powered ON and OFF with the avionics master switch. GMA 240 Audio Panel Mono/Stereo Headsets The unit can be turned ON and OFF with...
When wired correctly, the use of stereo headsets is highly recommended. During power-up to two ...always heard on the Pilot headphones. The active COM audio is used at one of the detent to turn OFF. A Garmin GMA 240 Pilot's Guide 7 Transceivers Pressing COM1 MIC or COM2 MIC Key selects the transmitter and receiver audio for microphone use. ... transceiver has been selected for the selected transceiver source. Power ON/OFF The GMA 240 may be powered ON and OFF with the avionics master switch. GMA 240 Audio Panel Mono/Stereo Headsets The unit can be turned ON and OFF with...
Pilot's Guide
Page 10
...1/TEL jack can accept music or telephone sources. These inputs are plugged into the GMA 240 front panel MUSIC 1 jack will bypass the MUSIC 1 rear input. MUSIC is selected. 10 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. This muting occurs during alerts (unless configured ... music volume and a gradual return to its original level. Either music source may be wired to either a stereo phone jack in a fixed mount (e.g. GMA 240 Audio Panel Entertainment Inputs The GMA 240 provides two stereo entertainment inputs; A MUSIC 1 and MUSIC 2. Press the MUSIC Key ...
...1/TEL jack can accept music or telephone sources. These inputs are plugged into the GMA 240 front panel MUSIC 1 jack will bypass the MUSIC 1 rear input. MUSIC is selected. 10 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. This muting occurs during alerts (unless configured ... music volume and a gradual return to its original level. Either music source may be wired to either a stereo phone jack in a fixed mount (e.g. GMA 240 Audio Panel Entertainment Inputs The GMA 240 provides two stereo entertainment inputs; A MUSIC 1 and MUSIC 2. Press the MUSIC Key ...
