SYSTEM DESCRIPTIONS
Pilot's Guide
The Garmin GTN 6XX or GTN 7XX Pilot's Guide, part number and revision
listed below, contain additional information regarding GTN system description,
control and function. The Pilot's Guides do not need to be immediately available
to the flight crew.
GTN 6XX Pilot's Guide
GTN 7XX Pilot's Guide
Power
Power to the GTN is provided through a circuit breaker labeled GPS or
NAV/GPS. If more than one GPS or NAV is installed then the label will
have a 1 or 2 to designate the unit receiving power.
Power to the optional GTN COM is provided through a circuit breaker
labeled COM. If more than one COM is installed then the label will also
have a number to designate the unit receiving power.
Power to the optional GMA 35 is provided through a circuit breaker labeled
AUDIO.
Lighting Controls
Control of the GTN backlight and bezel may be provided by either the built in
photocell or via the aircraft instrument dimmer switch. For this installation
dimming of the GTN is controlled by:
The GTN photocell.
The aircraft instrument dimmer switch.
If installed, the external HTAWS status annunciator is dimmed via a dedicated
HTAWS bright/dim switch. The HTAWS WARN/CAUTION annunciator can
be operated at two fixed brightness levels as controlled by the aircraft
BRIGHT/DIM switch.
GMA 35 Audio Panel (Optional)
The GTN 725 and 750 can interface to a GMA 35 remotely mounted audio
panel and marker beacon receiver. Controls for listening to various radios,
clearance playback control, and marker beacon are accessed by pressing the
"Audio Panel" button on the GTN display screen. Volume controls for the audio
panel, telephone, and music are accessed by pressing the "Intercom" button on
the GTN display screen.
If an optional GSR 56 is installed, when an incoming phone call is received it is
necessary to turn on the telephone audio to desired recipients. Press the
"Intercom" button on the GTN display screen, press the "Telephone" button,
and then press the buttons for those who will participate in the call. Telephone
volume can be adjusted using the controls on this page. Upon completion of the
call, turn off the telephone audio by pressing the "Intercom" button on the GTN
RFMS, Bell 407 GTN GPS/SBAS System
P/N 190-01004-03 Rev F or later
P/N 190-01007-03 Rev F or later
190-01007-J4 Rev. 1
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