Garmin SA01456Wi_D Manual Page 17

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G1000/GFC700 System Maintenance Manual – C90A/C90GT/C90GTi King Air Page 2-1
190-00682-01 Revision F
2 SYSTEM DESCRIPTION
2.1 Equipment Descriptions
2.1.1 GDU 1040A PFD (2) & GDU 1500 MFD
Two Garmin GDU 1040A displays and one GDU 1500 display are installed in the King Air instrument
panel. The GDU 1040A units, 10.4 inch LCD displays with 1024x768 resolution, are configured as PFD 1
and PFD 2; the GDU 1500 unit, a 15 inch LCD display with 1024x768 resolution, is configured as a MFD.
All displays provide control and display of nearly all functions of the G1000 integrated cockpit system. The
PFD displays are located on either side of the MFD, with the stand-by instruments located between the
Pilot’s PFD (PFD 1) and the MFD. GMA 1347 Audio Panels are located outboard of each PFD.
Additionally, a GMC 710 AFCS Controller is located in the upper instrument panel, above the MFD, and a
GCU 475 is installed in the pedestal. The GCU 475 provides the control interface for the MFD.
The GDU 1500 communicates with the GDU 1040A units and the GDL 69A through a high-speed data bus
(HSDB) Ethernet connection. The GDU 1500 communicated with the GCU 475 via RS-232 digital
interface.
The GDU 1040A units communicate with each other and the GIA 63W units through a high-speed data bus
(HSDB) Ethernet connection.
Electrical power to PFD 1, MFD, and PFD 2 is provided by the triple-fed bus. The triple-fed bus is powered
by the battery and both generator buses. Additionally, a secondary power source is provided to PFD 1 by the
center bus, which is fed by both generator buses and the battery. Therefore, the displays power-up
immediately with external or aircraft power or battery operation.
All displays are installed in the King Air panel using ¼-turn fasteners. Three CDU cooling fans are also
installed behind the panel for PFD and MFD cooling.
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