System Description; Lru Descriptions - Garmin G1000 Series Pilot's Manual

1.1 SYSTEM DESCRIPTION

This section provides an overview of the G1000
Integrated Cockpit System as installed in the Diamond
DA40 aircraft.
The G1000 uses the following Line Replaceable Units
(LRUs):
• GDU 1040 Primary Flight Display (PFD)
• GDU 1040 Multi Function Display (MFD)
• GIA 63 Integrated Avionics Units (IAU) - 2
• GEA 71 Engine/Airframe Unit
• GDC 74A Air Data Computer (ADC)
• GRS 77 Attitude and Heading Reference System
(AHRS)
• GMU 44 Magnetometer
• GMA 1347 Audio Panel with integrated Marker
Beacon Receiver
• GTX 33 Mode S Transponder
• GDL 69/69A Data Link
The LRUs are further described in the following section.
All LRUs are modular, which greatly eases troubleshooting
and maintenance of the G1000 System. A top-level G1000
block diagram is given in Figure 1-1. Additional/optional
equipment are shown in Figure 1-2.
NOTE: Refer to the Appendices for G1000 LRU
specifications.
190-00592-00 Rev. A Garmin G1000 Pilot's Guide for the Diamond DA40

1.2 LRU DESCRIPTIONS

• GDU 1040 – The GDU 1040s have 10.4-inch
LCD displays with 1024 x 768 resolution. The left
display is configured as a PFD and the right display
is configured as a MFD. Both displays link and are
used to show all functions of the G1000 System
during flight. The displays communicate with
each other through a High-Speed Data Bus (HSDB)
Ethernet connection. Each display is also paired
with an Ethernet connection to a GIA 63 Integrated
Avionics Unit.
• GMA 1347 – The GMA 1347 integrates NAV/COM
digital audio, intercom, and marker beacon controls.
The Audio Panel also provides manual control of
display reversionary mode (using the red DISPLAY
BACKUP button; see 1.7 System Operation) and is
installed between the MFD and the PFD. The Audio
Panel communicates with both IAUs using an RS-
232 digital interface.
SYSTEM OVERVIEW
1-1