Lru Description - Garmin G1000 NAV III Line Maintenance Manual

1.2 LRU Descriptions
Page 1-2
Rev. L
GDU 1040/1044B: The GDU 104X display is the most visible portion of the
G1000 system. The GDU 104X has a 10.4-inch LCD display with 1024 x 768
resolution. One is configured as a Primary Flight Display or PFD, the other is
configured as the Multi-Function Display or MFD. The MFD shows navigation
information and engine/airframe instrumentation. The PFD shows primary flight
information, in place of traditional gyro systems. Both GDU 104Xs link and
display all functions of the G1000 system during flight. The displays
communicate with each other and the GIA 63/63W units through a High-Speed
Data Bus (HSDB) Ethernet connection. The GDU 1044B provides autopilot
controls.
GMA 1347: The GMA 1347 integrates NAV/COM digital audio, intercom
system and marker beacon controls. Manual display reversion is also controlled
by the GMA 1347. The GMA 1347 is normally installed between the MFD and
PFD. The GMA 1347 can also be installed in dual-audio panel applications
(usually paired with a dual-PFD setup). The GMA 1347 communicates with
both GIAs using RS-232 digital interface. Software and configuration settings
are received through RS-232 digital interface with the GIA.
GIA 63/63W: The GIA is the central 'Integrated Avionics Unit' (IAU) to the
G1000 system. The GIA functions as a main communications hub, linking all
LRUs with the PFD and MFD displays. The GIA contains the GPS receiver, VHF
COM/NAV receivers, and system integration microprocessors. The GIA
communicates directly with the GDU 104X displays using a HSDB Ethernet
connection. Software and configuration settings are sent from the displays
through the GIA to LRUs in the system. The GIA 63W contains a WAAS
certified GPS receiver.
G1000 Nav III Line Maintenance Manual
190-00352-00