Installation Manual
Page 5
...-00 2-6 3-1 Audio Shield Termination ...3-2 4-1 Rear View of Backplate and Rack ...4-1 4-2 Rear Connectors J2401 & J2402, Viewed from Back of Unit 4-1 4-3 2.5 mm Plug Used with P2403 ...4-4 A-1 GMA 240 Outline Drawing ...A-1 A-2 GMA 240 Connector/Rack Assembly Drawing A-3 A-3 GMA 240 Recommended Panel Cutout Dimensions A-5 B-1 GMA 240 Interconnect Drawing (page 1 of 3 B-1 B-1 GMA 240 Interconnect Drawing (page 2 of 3 B-3 B-1 GMA 240 Interconnect Drawing (page 3 of 3 B-5 B-2 GMA 240, J2401 & J2402 Connector Layout Drawing B-7 C-1 GMA 240 Internal...
...-00 2-6 3-1 Audio Shield Termination ...3-2 4-1 Rear View of Backplate and Rack ...4-1 4-2 Rear Connectors J2401 & J2402, Viewed from Back of Unit 4-1 4-3 2.5 mm Plug Used with P2403 ...4-4 A-1 GMA 240 Outline Drawing ...A-1 A-2 GMA 240 Connector/Rack Assembly Drawing A-3 A-3 GMA 240 Recommended Panel Cutout Dimensions A-5 B-1 GMA 240 Interconnect Drawing (page 1 of 3 B-1 B-1 GMA 240 Interconnect Drawing (page 2 of 3 B-3 B-1 GMA 240 Interconnect Drawing (page 3 of 3 B-5 B-2 GMA 240, J2401 & J2402 Connector Layout Drawing B-7 C-1 GMA 240 Internal...
Installation Manual
Page 6
The table is current at www.garmin.com using their Garmin-provided user name and password. Authorized Garmin Sales and Service Centers are listed with the associated service bulletin number, service bulletin date, and the purpose of ...Garmin Dealer Resource web site at the time of publication of the modification. MOD LEVEL SERVICE BULLETIN NUMBER SERVICE BULLETIN DATE PURPOSE OF MODIFICATION Page iv Revision B GMA 240 Installation Manual 190-00917-01 GMA 240 HARDWARE MOD LEVEL HISTORY The following table identifies hardware modification (Mod) Levels for the GMA 240 Audio Panel...
The table is current at www.garmin.com using their Garmin-provided user name and password. Authorized Garmin Sales and Service Centers are listed with the associated service bulletin number, service bulletin date, and the purpose of ...Garmin Dealer Resource web site at the time of publication of the modification. MOD LEVEL SERVICE BULLETIN NUMBER SERVICE BULLETIN DATE PURPOSE OF MODIFICATION Page iv Revision B GMA 240 Installation Manual 190-00917-01 GMA 240 HARDWARE MOD LEVEL HISTORY The following table identifies hardware modification (Mod) Levels for the GMA 240 Audio Panel...
Installation Manual
Page 7
...circuitry and extensive use of aircraft owners and operators who require reliability and versatility in the GMA 240 Pilot's Guide, P/N 190-00917-00. 1.2 Equipment Description The Garmin GMA 240 Audio Panel is controlled by the aircraft lighting bus. The brightness of the backlighting is not a... surface mount technology are employed. To further simplify the cockpit workload, the intercom provides for the Garmin GMA 240 Audio Panel. Figure 1-1. B GMA 240 Unit View GMA 240 Installation Manual 190-00917-01 Page 1-1 Rev. Information pertaining to the maintenance of the unit can...
...circuitry and extensive use of aircraft owners and operators who require reliability and versatility in the GMA 240 Pilot's Guide, P/N 190-00917-00. 1.2 Equipment Description The Garmin GMA 240 Audio Panel is controlled by the aircraft lighting bus. The brightness of the backlighting is not a... surface mount technology are employed. To further simplify the cockpit workload, the intercom provides for the Garmin GMA 240 Audio Panel. Figure 1-1. B GMA 240 Unit View GMA 240 Installation Manual 190-00917-01 Page 1-1 Rev. Information pertaining to the maintenance of the unit can...
Installation Manual
Page 8
... warning audio input • Full duplex Telephone interface • Front Panel Mini-Jack (MP3 player, cellular phone, etc.) 1.3 Technical Specifications 1.3.1 Physical Characteristics Characteristic Bezel Height Bezel Width Rack Height (Dimple to Dimple) Rack Width Depth Behind Panel with Connectors (measured from face of aircraft panel to rear of connector backshells) GMA 240 Weight (Unit Only) GMA 240 Weight...
... warning audio input • Full duplex Telephone interface • Front Panel Mini-Jack (MP3 player, cellular phone, etc.) 1.3 Technical Specifications 1.3.1 Physical Characteristics Characteristic Bezel Height Bezel Width Rack Height (Dimple to Dimple) Rack Width Depth Behind Panel with Connectors (measured from face of aircraft panel to rear of connector backshells) GMA 240 Weight (Unit Only) GMA 240 Weight...
Installation Manual
Page 9
...: 2 (pilot, copilot/passengers) VOX circuits: 4 (one per mic input) Microphone input impedance: 450 Ω (compatible with 150 to +85°C (storage) Altitude 55,000 Feet Audio Panel Functions Dedicated Transceiver inputs: 3 (including TEL) Dedicated Receiver inputs: 4 (all , crew) Telephone interfaces: 1 full-duplex (use LRU pins or front jack) Headphone Outputs Output amplifiers...
...: 2 (pilot, copilot/passengers) VOX circuits: 4 (one per mic input) Microphone input impedance: 450 Ω (compatible with 150 to +85°C (storage) Altitude 55,000 Feet Audio Panel Functions Dedicated Transceiver inputs: 3 (including TEL) Dedicated Receiver inputs: 4 (all , crew) Telephone interfaces: 1 full-duplex (use LRU pins or front jack) Headphone Outputs Output amplifiers...
Installation Manual
Page 13
... Stereo headphone jacks (up to 4), microphone jacks (up to 4), 3.5mm stereo jacks (up to installation. 2.2 Installation Materials 2.2.1 Equipment Available GMA 240 Audio Panel, Ship Level Assembly, P/N 010-00735-() includes the following sections: • Wiring options - B Cabling will fabricate and supply all jacks to... 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 011-00652-00 011-00678-00 011-01988-00 011-02079-00 115-00262...
... Stereo headphone jacks (up to 4), microphone jacks (up to 4), 3.5mm stereo jacks (up to installation. 2.2 Installation Materials 2.2.1 Equipment Available GMA 240 Audio Panel, Ship Level Assembly, P/N 010-00735-() includes the following sections: • Wiring options - B Cabling will fabricate and supply all jacks to... 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 011-00652-00 011-00678-00 011-01988-00 011-02079-00 115-00262...
Installation Manual
Page 14
... be used only if the audio panel is in the installation. B GMA 240 Installation Manual 190-00917-01 Refer to intercom operation. If a jumper is recommended. If this position, when TEL is selected the audio panel will not be heard when the TEL button is not responsible for damage caused during transmission. Garmin is selected. 2.3.1 Internal Configuration...
... be used only if the audio panel is in the installation. B GMA 240 Installation Manual 190-00917-01 Refer to intercom operation. If a jumper is recommended. If this position, when TEL is selected the audio panel will not be heard when the TEL button is not responsible for damage caused during transmission. Garmin is selected. 2.3.1 Internal Configuration...
Installation Manual
Page 15
... in this configuration is receiving audio. CW adjustment increases the levels for volume inputs and for the mute threshold for transmission) is supplied in the top cover of the access holes. GMA 240 Installation Manual 190-00917-01 ...Page 2-3 Rev. Reserved Reserved Reserved Reserved Reserved 2.3.2 VOLUME/MUTE Configuration Adjustments The following adjustments can be set fully CCW (live MIC). Alert 3 Volume 4. B Use a 2 mm (max blade width) flat-blade non-conductive screw driver or adjustment tool. Alert 2 Volume 3. Front panel...
... in this configuration is receiving audio. CW adjustment increases the levels for volume inputs and for the mute threshold for transmission) is supplied in the top cover of the access holes. GMA 240 Installation Manual 190-00917-01 ...Page 2-3 Rev. Reserved Reserved Reserved Reserved Reserved 2.3.2 VOLUME/MUTE Configuration Adjustments The following adjustments can be set fully CCW (live MIC). Alert 3 Volume 4. B Use a 2 mm (max blade width) flat-blade non-conductive screw driver or adjustment tool. Alert 2 Volume 3. Front panel...
Installation Manual
Page 16
...the pilot and copilot will hear each other but will be wired in reach of the operator. CREW ISO: This input configures the audio panel for implementing these inputs is configured). PILOT ISO MUSIC: This input configures music to chassis through a suitable switch mounted in parallel with ...available by externally wiring pins to be heard by the pilot and copilot if crew isolate mode is not squelched. Page 2-4 Rev. B GMA 240 Installation Manual 190-00917-01 See Section 4.4.1 for connector and pin details for crew intercom isolation in place of operation is selected, the ...
...the pilot and copilot will hear each other but will be wired in reach of the operator. CREW ISO: This input configures the audio panel for implementing these inputs is configured). PILOT ISO MUSIC: This input configures music to chassis through a suitable switch mounted in parallel with ...available by externally wiring pins to be heard by the pilot and copilot if crew isolate mode is not squelched. Page 2-4 Rev. B GMA 240 Installation Manual 190-00917-01 See Section 4.4.1 for connector and pin details for crew intercom isolation in place of operation is selected, the ...
Installation Manual
Page 17
...PTT key is activated for COM transmit. 2.4 Noise Because the audio panel is the main reason why all audio jacks should be overstressed for the various avionics producing and processing audio signals. 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 potential can sneak into audio system interconnecting cables by ground differentials,...
...PTT key is activated for COM transmit. 2.4 Noise Because the audio panel is the main reason why all audio jacks should be overstressed for the various avionics producing and processing audio signals. 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 potential can sneak into audio system interconnecting cables by ground differentials,...
Installation Manual
Page 21
... GMA 240 into the rack. Turn the unit off .] GMA 240 Installation Manual 190-00917-01 Page 3-3 Rev. Perform a ramp test radio check by rotating the pilot intercom knob clockwise. 2. This is because the unit is heard in the pilot headphone's left earpiece. 3. Set the intercom to open. If installed, check that disconnects the audio panel...
... GMA 240 into the rack. Turn the unit off .] GMA 240 Installation Manual 190-00917-01 Page 3-3 Rev. Perform a ramp test radio check by rotating the pilot intercom knob clockwise. 2. This is because the unit is heard in the pilot headphone's left earpiece. 3. Set the intercom to open. If installed, check that disconnects the audio panel...
Installation Manual
Page 28
... ICS KEY function if the audio panel has been configured for COM 2 * Denotes Active Low (Sinks current to ground when active) I /O Enables respective MIC audio into IN the selected transceiver unit IN Pilot Mic audio input and ground IN reference -- Copilot Mic audio input and ground IN reference ... LO 35 P2402 PASS 1 MIC AUDIO IN HI 36 P2402 PASS 1 MIC AUDIO IN LO 37 P2402 PASS 2 MIC AUDIO IN HI 38 P2402 PASS 2 MIC AUDIO IN LO *Denotes Active Low (Ground to activate) Description I /O OUT OUT IN OUT -IN OUT -- B GMA 240 Installation Manual 190-00917-01 Passenger...
... ICS KEY function if the audio panel has been configured for COM 2 * Denotes Active Low (Sinks current to ground when active) I /O Enables respective MIC audio into IN the selected transceiver unit IN Pilot Mic audio input and ground IN reference -- Copilot Mic audio input and ground IN reference ... LO 35 P2402 PASS 1 MIC AUDIO IN HI 36 P2402 PASS 1 MIC AUDIO IN LO 37 P2402 PASS 2 MIC AUDIO IN HI 38 P2402 PASS 2 MIC AUDIO IN LO *Denotes Active Low (Ground to activate) Description I /O OUT OUT IN OUT -IN OUT -- B GMA 240 Installation Manual 190-00917-01 Passenger...
Pilot's Guide
Page 4
...volume. The large right knob controls Copilot and passenger squelch. 4 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. The large left small knob) controls the ON and OFF function (Full CCW detent is OFF). A GMA 240 Audio Panel Pilot's Squelch Knob ON/OFF and Pilot's Volume Knob Copilot/ ...Passenger Squelch Knob Copilot/ Passenger/ Music Volume Knob Music On/ Off Key Com Receiver Monitor Mute Nav Receiver and Keys Key AUX Audio Keys Music 1 or 2 Select Key...
...volume. The large right knob controls Copilot and passenger squelch. 4 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. The large left small knob) controls the ON and OFF function (Full CCW detent is OFF). A GMA 240 Audio Panel Pilot's Squelch Knob ON/OFF and Pilot's Volume Knob Copilot/ ...Passenger Squelch Knob Copilot/ Passenger/ Music Volume Knob Music On/ Off Key Com Receiver Monitor Mute Nav Receiver and Keys Key AUX Audio Keys Music 1 or 2 Select Key...
Pilot's Guide
Page 5
... which input is always selected as active. Mutes all other monitored receivers when the active transceiver receives audio. Pressing again deselects the audio. Music 1/TEL jack. When selected, music is heard in addition to the selected transceiver. Pressing ...key selects the Nav receiver or AUX audio input. A Garmin GMA 240 Pilot's Guide 5 Pressing again deselects music. Music Source 1 or 2 selection key and Music Source Annunciators. Transceiver selection keys. Pressing again deselects the telephone. GMA 240 Audio Panel COM receiver keys. External music device ...
... which input is always selected as active. Mutes all other monitored receivers when the active transceiver receives audio. Pressing again deselects the audio. Music 1/TEL jack. When selected, music is heard in addition to the selected transceiver. Pressing ...key selects the Nav receiver or AUX audio input. A Garmin GMA 240 Pilot's Guide 5 Pressing again deselects music. Music Source 1 or 2 selection key and Music Source Annunciators. Transceiver selection keys. Pressing again deselects the telephone. GMA 240 Audio Panel COM receiver keys. External music device ...
Pilot's Guide
Page 6
GMA 240 Audio Panel Features and Operation The Garmin GMA 240 is selected. LED annunciators indicate when a key function is a headphones only audio control panel. In case power is interrupted or the unit is adjusted by photocell dimming. The passengers cannot transmit over the active COM radio, even if equipped ...
GMA 240 Audio Panel Features and Operation The Garmin GMA 240 is selected. LED annunciators indicate when a key function is a headphones only audio control panel. In case power is interrupted or the unit is adjusted by photocell dimming. The passengers cannot transmit over the active COM radio, even if equipped ...
Pilot's Guide
Page 7
... unit undergoes a self-test, illuminating all panel annunciator lights for microphone use of stereo headsets is always heard on a monaural headset hears only the left ear only, unless their headset has a mono/ stereo switch set to two (2) passengers). Either audio source can accommodate up to ground. A Garmin GMA 240 Pilot's Guide 7 When wired correctly, the...
... unit undergoes a self-test, illuminating all panel annunciator lights for microphone use of stereo headsets is always heard on a monaural headset hears only the left ear only, unless their headset has a mono/ stereo switch set to two (2) passengers). Either audio source can accommodate up to ground. A Garmin GMA 240 Pilot's Guide 7 When wired correctly, the...
Pilot's Guide
Page 8
...two modes of the aircraft. When configured for the desired audio level. They remain active as audio sources until deselected. Intercom The GMA 240 includes a four-position intercom system (ICS) with every other occupant. 8 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. Two volume controls...In Pilot mode, (PILOT ISO annunciator is illuminated) the Pilot is pressed. Each audio source can be configured for a combined Copilot/passenger control, set intercom audio level. GMA 240 Audio Panel When a microphone is keyed, the active transceiver's MIC key LED blinks approximately once ...
...two modes of the aircraft. When configured for the desired audio level. They remain active as audio sources until deselected. Intercom The GMA 240 includes a four-position intercom system (ICS) with every other occupant. 8 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. Two volume controls...In Pilot mode, (PILOT ISO annunciator is illuminated) the Pilot is pressed. Each audio source can be configured for a combined Copilot/passenger control, set intercom audio level. GMA 240 Audio Panel When a microphone is keyed, the active transceiver's MIC key LED blinks approximately once ...
Pilot's Guide
Page 9
... parties to talk at once. 190-00917-00 Rev. Telephone communication is active, operation depends on configuration. GMA 240 Audio Panel Press the ICS Key to activate telephone operation. Press the PILOT ISO Key for these positions. A Garmin GMA 240 Pilot's Guide 9 Mode Pilot Hears Copilot Hears Passenger Hears ALL (PILOT ISO not Selected) Selected Radios, Alerts...
... parties to talk at once. 190-00917-00 Rev. Telephone communication is active, operation depends on configuration. GMA 240 Audio Panel Press the ICS Key to activate telephone operation. Press the PILOT ISO Key for these positions. A Garmin GMA 240 Pilot's Guide 9 Mode Pilot Hears Copilot Hears Passenger Hears ALL (PILOT ISO not Selected) Selected Radios, Alerts...
Pilot's Guide
Page 10
... Key is selected, and any time the TEL Key is selected. Annunciators above the key indicate which music source is selected. 10 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. A The selected source is soft-muted under certain conditions. Soft-muting refers to the temporary... a GPSMAP 396 dock or a CD player). Either music source may be wired to either the MUSIC 1 or MUSIC 2 input. GMA 240 Audio Panel Entertainment Inputs The GMA 240 provides two stereo entertainment inputs; The MUSIC 1 and MUSIC 2 rear inputs may be heard. MUSIC is heard by all unless intercom ...
... Key is selected, and any time the TEL Key is selected. Annunciators above the key indicate which music source is selected. 10 Garmin GMA 240 Pilot's Guide 190-00917-00 Rev. A The selected source is soft-muted under certain conditions. Soft-muting refers to the temporary... a GPSMAP 396 dock or a CD player). Either music source may be wired to either the MUSIC 1 or MUSIC 2 input. GMA 240 Audio Panel Entertainment Inputs The GMA 240 provides two stereo entertainment inputs; The MUSIC 1 and MUSIC 2 rear inputs may be heard. MUSIC is heard by all unless intercom ...
Pilot's Guide
Page 11
... Pilot during transmission. Phone detection is receiving audio. • Enable Keyed ICS - GMA 240 Audio Panel GMA 240 PROGRAMMING OPTIONS Programming options include variable configurations that can be arranged by primary COM only - Audio panel assumes a telephone is plugged into the jack whenever the TEL Key is pressed. • Individual volume controls - A Garmin GMA 240 Pilot's Guide 11 When RADIO Key is...
... Pilot during transmission. Phone detection is receiving audio. • Enable Keyed ICS - GMA 240 Audio Panel GMA 240 PROGRAMMING OPTIONS Programming options include variable configurations that can be arranged by primary COM only - Audio panel assumes a telephone is plugged into the jack whenever the TEL Key is pressed. • Individual volume controls - A Garmin GMA 240 Pilot's Guide 11 When RADIO Key is...
