Garmin G1000 NAV III User manual

190-00352-00 March 2008 Rev. L
G1000 NAV III
LINE MAINTENANCE MANUAL

Page A G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
© Copyright 2004-2008
Garmin Ltd. or its subsidiaries
All Rights Reserved
Except as expressly provided herein, no part of this manual may be reproduced, copied, transmitted, disseminated,
downloaded or stored in any storage medium, for any purpose without the express prior written consent of Garmin. Garmin
hereby grants permission to download a single copy of this manual and of any revision to this manual onto a hard drive or
other electronic storage medium to be viewed and to print one copy of this manual or of any revision hereto, provided that
such electronic or printed copy of this manual or revision must contain the complete text of this copyright notice and
provided further that any unauthorized commercial distribution of this manual or any revision hereto is strictly prohibited.
Garmin International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: [phone]
Aviation Panel-Mount Technical Support Line (Toll Free): 1-888-606-5482
www.garmin.com
Garmin (Europe) Ltd.
Liberty House, Bulls Copse Road, Hounsdown Business Park
Southampton, SO40 9RB, U.K.
Telephone: [phone]
RECORD OF REVISIONS
Revision Revision
Date
Description
A 6/24/04 Production release, no major changes
B 12/15/04 Made minor changes to software loading procedure (Section 4)
C 2/24/05 Made document Nav III specific and updated for new software
(GDU 4.03)
D 3/11/05 Changed GDU software version to 4.04
E 2/1/06
Updated manual for BP 2006
F 6/16/06
Expanded troubleshoot section
G 12/6/06
Updated manual for BP 2007
H 1/11/07
Expanded GDC testing section
J 07/09/07
Updated Manual per System Software v563.03
K 07/16/07
Added Power Interrupt Tests to Section 6
L 3/20/08
Updated for system software 0563.06
DOCUMENT PAGINATION
Section Pages
Table of Contents i-viii
Section 1 1-1 to 1-18
Section 2 2-1 to 2-92
Section 3 3-1 to 3-6
Section 4 4-1 to 4-48
Section 5 5-1 to 5-4
Section 6 6-1 to 6-6
Appendix A A-1 to A-30
Appendix B B-1 to B-34

G1000 Nav III Line Maintenance Manual Page i
190-00352-00 Rev. L
This manual was written for Cessna Nav III G1000 System Software version 0563.06 or later approved
software. Some differences in operation may be observed when comparing the information in this manual
to earlier or later software versions.
This manual is written for the following NAV III aircraft models:
•Cessna Skyhawk 172R and 172S
•Cessna Skylane 182T
•Cessna Turbo Skylane T182T
•Cessna Stationair 206H
•Cessna Turbo Stationair T206H
The following are General Safety Precautions that are not related to any specific procedure and therefore
do not appear elsewhere in this maintenance manual. These are recommended precautions that personnel
should understand and apply during the many phases of maintenance and repair.
KEEP AWAY FROM LIVE CIRCUITS. Maintenance personnel shall observe all safety regulations
at all times. Turn off system power before making or breaking electrical connections. Regard any exposed
connector, terminal board, or circuit board as a possible shock hazard. Components which retain a charge
shall be discharged only when such grounding does not result in equipment damage. If a test connection
to energized equipment is required, make the test equipment ground connection before probing the
voltage or signal to be tested.
DO NOT SERVICE ALONE. Personnel shall not under any circumstances reach into or enter any
enclosure for the purpose of servicing or adjusting the equipment without immediate presence or
assistance of another person capable of rendering aid.
INFORMATION SUBJECT TO EXPORT CONTROL LAWS
This document may contain information which is subject to the Export Administration Regulations
("EAR") issued by the United States Department of Commerce (15 CFR, Chapter VII, Subchapter C) and
which may not be exported, released, or disclosed to foreign nationals inside or outside of the United
States without first obtaining an export license. A violation of the EAR may be subject to a penalty of up
to 10 years imprisonment and a fine of up to $1,000,000 under Section 2410 of the Export Administration
Act of 1979. Include this notice with any reproduced portion of this document.
WARNING
This product, its packaging, and its components contain chemicals known to the State of
California to cause cancer, birth defects, or reproductive harm. This Notice is being
provided in accordance with California's Proposition 65. If you have any questions or
would like additional information, please refer to our web site at
www.garmin.com/prop65.

Page ii G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
WARNING
The GDU 104X lamps contain mercury and must be recycled or disposed of according to
local, state, or federal laws. If you have any questions or would like additional
information, please refer to our web site at
www.garmin.com/aboutGarmin/environment/disposal.jsp.
CAUTION
The GDU 104X lens is coated with a special anti-reflective coating which is very
sensitive to skin oils, waxes and abrasive cleaners. CLEANERS CONTAINING
AMMONIA WILL HARM THE ANTI-REFLECTIVE COATING. It is very important
to clean the lens using a clean, lint-free cloth and an eyeglass lens cleaner that is specified
as safe for anti-reflective coatings.
CAUTION
All G1000 screen shots used in this document are only intended to serve as a visual
reference. All information depicted in screen shots, including software version and part
numbers, is subject to change and may not be up to date.

G1000 Nav III Line Maintenance Manual Page iii
190-00352-00 Rev. L
TABLE OF CONTENTS
PARAGRAPH PAGE
1 GENERAL DESCRIPTION..............................................................................................................1-1
1.1 Introduction........................................................................................................................................1-1
1.2 LRU Description................................................................................................................................1-2
1.3 G1000 Block Diagrams .....................................................................................................................1-6
1.4 User Interface.....................................................................................................................................1-9
1.5 Recommended Tools .......................................................................................................................1-17
2 TROUBLESHOOTING.....................................................................................................................2-1
2.1 G1000 Alerting System .....................................................................................................................2-1
2.2 GDU 104X.......................................................................................................................................2-19
2.3 GMA 1347.......................................................................................................................................2-38
2.4 GIA 63/GIA 63W ............................................................................................................................2-43
2.5 GRS 77/GMU 44.............................................................................................................................2-55
2.6 GDC 74A.........................................................................................................................................2-59
2.7 GEA 71............................................................................................................................................2-61
2.8 GTX 33............................................................................................................................................2-74
2.9 GDL 69/69A....................................................................................................................................2-75
2.10 GDL 90............................................................................................................................................2-78
2.11 GFC 700 (BP 2007 and later only)..................................................................................................2-79
2.12 Backshell Connectors ......................................................................................................................2-88
3 EQUIPMENT REMOVAL & INSTALLATION ............................................................................3-1
3.1 GDU 104X.........................................................................................................................................3-1
3.2 GMA 1347.........................................................................................................................................3-1
3.3 GIA 63/GIA 63W ..............................................................................................................................3-1
3.4 GRS 77/GMU 44 ..............................................................................................................................3-2
3.5 GDC 74A...........................................................................................................................................3-2
3.6 GEA 71..............................................................................................................................................3-2
3.7 GTX 33..............................................................................................................................................3-3
3.8 GDL 69/69A......................................................................................................................................3-3
3.9 GDL 90..............................................................................................................................................3-3
3.10 GSA 81 ..............................................................................................................................................3-3
3.11 GSM 85..............................................................................................................................................3-4
3.12 Configuration Module........................................................................................................................3-5
3.13 GEA 71 Backshell Thermocouple.....................................................................................................3-6

Page iv G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
4 UPLOADING SOFTWARE, CONFIGURING, & TESTING .........................................................4-1
4.1 GDU 104X.........................................................................................................................................4-1
4.2 GMA 1347.........................................................................................................................................4-5
4.3 GIA 63/GIA 63W ..............................................................................................................................4-8
4.4 GRS 77/GMU 44.............................................................................................................................4-17
4.5 GDC 74A.........................................................................................................................................4-30
4.6 GEA 71............................................................................................................................................4-34
4.7 GTX 33............................................................................................................................................4-38
4.8 GDL 69A.........................................................................................................................................4-41
4.9 GDL 90............................................................................................................................................4-44
4.10 GSA 81 ............................................................................................................................................4-44
5 FINAL SYSTEM CHECKOUT........................................................................................................5-1
5.1 GPS Failure Test................................................................................................................................5-1
5.2 GIA Failure Test................................................................................................................................5-2
5.3 Display Failure Test...........................................................................................................................5-2
5.4 AHRS/Air Data Backup Path Test.....................................................................................................5-3
5.5 Flight Test..........................................................................................................................................5-3
6 PERIODIC MAINTENANCE ..........................................................................................................6-1
6.1 Introduction........................................................................................................................................6-1
6.2 GFC 700 Visual Inspection Procedure ..............................................................................................6-3
6.3 GSA 81 Greasing Procedure..............................................................................................................6-3
6.4 GSM Slip Clutch Checking and Adjustment Procedure....................................................................6-3
6.5 Category A Long Term Power Interrupt Annual Inspection Procedure............................................6-4
APPENDIX A G1000 PINOUT LIST.....................................................................................................A-1
A.1 GIA 63/GIA 63W .............................................................................................................................A-1
A.2 GDU 104X......................................................................................................................................A-12
A.3 GRS 77............................................................................................................................................A-14
A.4 GMU 44..........................................................................................................................................A-15
A.5 GDC 74A........................................................................................................................................A-16
A.6 GEA 71...........................................................................................................................................A-18
A.7 GMA 1347......................................................................................................................................A-22
A.8 GTX 33...........................................................................................................................................A-26
A.9 GDL 69/69A...................................................................................................................................A-28
A.10GSA 81 ...........................................................................................................................................A-30

G1000 Nav III Line Maintenance Manual Page v
190-00352-00 Rev. L
APPENDIX B G1000 SYSTEM SOFTWARE & CONFIGURATION................................................. B-1
B.1 Initial Software & Configuration Overview..................................................................................... B-2
B.2 Final Configuration Items...............................................................................................................B-24
B.3 Software/Configuration Troubleshooting.......................................................................................B-26
B.4 System Communication Hierarchy.................................................................................................B-27
B.5 Aviation Database...........................................................................................................................B-28
B.6 TAWS Configuration......................................................................................................................B-29
B.7 SD Card Use ...................................................................................................................................B-31

Page vi G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
LIST OF FIGURES
FIGURE PAGE
1-1 Typical Cessna Nav III G1000 System Interconnect.........................................................................1-6
1-2 G1000 Flight Instrumentation Data Paths..........................................................................................1-7
1-3 G1000 Navigation/Communication Data Paths.................................................................................1-8
1-4 GDU 104X Control Interface ............................................................................................................1-9
1-5 GMA 1347 Control Interface.............................................................................................................1-9
1-6 FMS Control Knob ..........................................................................................................................1-10
1-7 G1000 Softkeys ...............................................................................................................................1-11
1-8 Configuration Mode Navigation......................................................................................................1-11
1-9 G1000 Configuration Storage..........................................................................................................1-14
1-10 GRS/GDC Configuration Storage ...................................................................................................1-15
1-11 SET/ACTV Feature .........................................................................................................................1-16
1-12 Configuration Status........................................................................................................................1-16
2-1 Red X’d Display Fields......................................................................................................................2-1
2-2 Alerts & Annunciations.....................................................................................................................2-6
2-3 System Status Page (AUX Group).....................................................................................................2-6
2-4 AFCS Annunciation Field .................................................................................................................2-7
2-5 RS-232/ARINC 429 CONFIG Page................................................................................................2-19
2-6 GDU STATUS Page........................................................................................................................2-20
2-7 GDU TEST Page .............................................................................................................................2-22
2-8 DIAGNOSTICS Page......................................................................................................................2-25
2-9 SERIAL/ETHERNET I/O Page.......................................................................................................2-26
2-10 ALERT CONFIGURATION Page..................................................................................................2-27
2-11 AIRFRAME CONFIGURATION Page..........................................................................................2-27
2-12 GMA CONFIGURATION Page .....................................................................................................2-38
2-13 GMA 1347 Data Paths.....................................................................................................................2-42
2-14 RS-232/ARINC 429.........................................................................................................................2-43
2-15 CAN/RS-485 CONFIGURATION Page.........................................................................................2-44
2-16 GIA I/O CONFIGURATION Page .................................................................................................2-45
2-17 COM SETUP Page ..........................................................................................................................2-46
2-18 GIA STATUS Page .........................................................................................................................2-47
2-19 AHRS/AIR DATA INPUT Page.....................................................................................................2-55
2-20 GRS 77 Data Paths ..........................................................................................................................2-58
2-21 GDC 74A Data Paths.......................................................................................................................2-60
2-22 ENGINE DATA Page......................................................................................................................2-61
2-23 GEA STATUS Page ........................................................................................................................2-62
2-24 GEA Configuration Page.................................................................................................................2-63
2-25 GEA 71 DATA Paths ......................................................................................................................2-65
2-26 MFD AUX – SYSTEM STATUS Page ..........................................................................................2-66
2-27 HSCM Offset Tool User Interface...................................................................................................2-67
2-28 CONFIGURATION UPLOAD Page (GDU software version 6.01 or earlier) ...............................2-68

G1000 Nav III Line Maintenance Manual Page vii
190-00352-00 Rev. L
2-29 CONFIGURATION UPLOAD Page (GDU software version 7.01 or later)...................................2-69
2-30 HSCM Offset Tool User Interface...................................................................................................2-70
2-31 Example Post-Calibration Email .....................................................................................................2-71
2-32 HSCM Calibration Page ..................................................................................................................2-72
2-33 GTX 33 Data Paths..........................................................................................................................2-74
2-34 GDL 69 Page ...................................................................................................................................2-75
2-35 GDL 69 Data Paths..........................................................................................................................2-78
2-36 GFC CONFIGURATION Page.......................................................................................................2-79
2-37 GFC STATUS Page.........................................................................................................................2-80
2-38 GIA 63/GIA 63W Backshell Connectors ........................................................................................2-88
2-39 GEA 71 Backshell Connectors ........................................................................................................2-88
2-40 GMA 1347 Backshell Connectors...................................................................................................2-89
2-41 GTX 33 Backshell Connectors ........................................................................................................2-89
2-42 GDU 104X Backshell Connector (P10001).....................................................................................2-89
2-43 GRS 77 Backshell Connector (P771) ..............................................................................................2-89
2-44 GDC 74A Backshell Connector (P741)...........................................................................................2-90
2-45 GDL 69/69A Backshell Connector (P691)......................................................................................2-90
2-46 GDL 90 Backshell Connectors ........................................................................................................2-90
2-47 GSA 81 Connector (P801)...............................................................................................................2-91
4-1 Marker Beacon Symbology...............................................................................................................4-7
4-2 Non-WAAS (GIA 63) System Status Page .......................................................................................4-8
4-3 WAAS (GIA 63W) System Status Page............................................................................................4-9
4-4 System Upload Page..........................................................................................................................4-9
4-5 AUX-GPS STATUS Page...............................................................................................................4-15
4-6 Pitch/Roll Offset..............................................................................................................................4-21
4-7 Magnetometer Calibration...............................................................................................................4-23
4-8 Engine Run-Up................................................................................................................................4-25
4-9 Magnetometer Interference..............................................................................................................4-27
4-10 GEA CONFIGURATION ...............................................................................................................4-35
6-1 Backup Capacitor Test Selection.......................................................................................................6-2
6-2 Upload Complete Window ................................................................................................................6-3
6-3 BKUP CAPS Checkbox on GDU TEST Page...................................................................................6-3
B-1 Software/Configuration Overview (GDU Software Version 6.01 and earlier).................................B-2

Page viii G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
LIST OF TABLES
TABLE PAGE
4-1 GRS 77/GMU 44 Calibration..........................................................................................................4-21
4-2 Example Magnetometer Interference Test Sequence ......................................................................4-28
6-1 Long Term Power Interrupt Category B (50 mS) Mod Status...........................................................6-1
6-2 T206H Slip Clutch Settings...............................................................................................................6-3
6-3 T182T Slip Clutch Settings................................................................................................................6-3

G1000 Nav III Line Maintenance Manual Page 1-1
190-00352-00 Rev. L
1GENERAL DESCRIPTION
1.1 Introduction
This manual is intended to be a non-airframe specific top level maintenance manual that provides basic
troubleshooting, removal and replacement instructions, software and configuration instructions, and return to
service information for the G1000 system. Field service of the G1000 is limited to replacing LRUs (Line
Replaceable Unit).
The following outline describes the organization of this manual:
Section 1: This section contains a brief description of each LRU and a basic overview of the
G1000 system’s normal, reversionary, and configuration modes. The
configuration mode user interface is described along with a brief summary of
configuration mode functionality.
Section 2: This section contains basic troubleshooting instructions for the G1000.
Section 3: This section contains basic removal and replacement instructions for G1000
LRUs.
Section 4: This section contains basic instructions for uploading software, configuring, and
testing the G1000.
Section 5: This section contains a checkout of the G1000 system. Only G1000-specific
elements are addressed.
Section 6: This section contains basic periodic maintenance instructions for the G1000
system.
Appendix A: This section contains a list of G1000 pinouts.
Appendix B: The section serves as a complete reconfiguration of the G1000 system.

Page 1-2 G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
1.2 LRU Descriptions
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 Page 1-3
190-00352-00 Rev. L
GRS 77:The GRS 77 is an attitude, heading, and reference, or AHRS, unit that
provides aircraft attitude and flight characteristics information to the G1000
displays and GIAs. The unit contains advanced tilt sensors, accelerometers, and
rate sensors. In addition, the GRS 77 interfaces with both the GDC 74A Air Data
computer and the GMU 44 magnetometer. The GRS 77 also utilizes GPS signals
sent from the GIA. Actual attitude and heading information is sent using ARINC
429 digital interface to both GDU 104Xs and GIAs.
GMU 44:The GMU 44 magnetometer senses magnetic field information. Data is
sent to the GRS 77 ARHS for processing to determine aircraft magnetic heading.
This unit receives power directly from the GRS 77 and communicates with the
GRS 77 using RS-485 digital interface.
GDC 74A:The GDC 74A air data computer compiles information from the
pitot/static system and various outside air temperature (OAT) and angle of attack
(AOA) sensors. The GDC 74A is responsible to provide pressure altitude,
airspeed, vertical speed, and OAT information to the G1000 system. The GDC
74A communicates with the GIA 63/GIA 63W, GDU 104X, and GRS 77 using
ARINC 429 digital interface. Software and configuration settings are received
through RS-232 digital interface with the GIA 63/GIA 63W.
GEA 71:The GEA 71 is a microprocessor-based LRU that is responsible for
receiving/processing signals from engine and airframe sensors. Sensor examples
include engine temperature and pressure sensors as well as fuel measurement and
pressure sensors. The GEA 71 communicates directly with both GIAs using RS-
485 digital interface. The GEA 71 can serve aircraft from basic single-engine
platforms to sophisticated turbine propulsion systems. Software and configuration
settings are received through RS-232 digital interface with the GIA.

Page 1-4 G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
GTX 33:Solid-state Mode-S transponder. Provides Modes A, C, and S functions.
Control and operation is directed through the PFD. The transponder
communicates with both GIAs through RS-232 digital interface. Software and
configuration settings are received through RS-232 digital interface with the GIA.
GDL 69/69A: The GDL 69/69A is an XM Satellite Radio data link receiver that
receives broadcast weather data. The GDL 69A is the same as the GDL 69 with
the addition of XM Satellite Radio audio entertainment. Weather data and control
of audio channel and volume is displayed on the GDU 104X MFD, via a High-
Speed Data Bus (HSDB) Ethernet connection. The GDL 69A is also interfaced to
the GMA 1347 Audio Panel for amplification and distribution of the audio signal.
GDL 90 The GDL 90 is a remote-mounted product that contains a GPS/WAAS
receiver and a Universal Access Transceiver. The GDL 90 will transmit
“ownship” data via the UAT data link. It will receive data from other UAT-
equipped aircraft as well as FIS-B weather – the received data may be output to an
appropriate display.

G1000 Nav III Line Maintenance Manual Page 1-5
190-00352-00 Rev. L
GSA 81 & GSM 85: The GSA 81 servo actuator is an electromechanical LRU
that provides automatic control of pitch, roll, and pitch trim. It also provides
manual electric trim functionality. The GSA 81 contains a motor-control and
monitor circuit board, as well as a solenoid and a brushless DC motor. The GSA
81 receives serial RS-485 data packets from the GIA 63Ws.
The GSM 85 servo mount is mounted to the aircraft structure, via a custom
mounting bracket, and is responsible for transferring the output torque of the
GSA 81 servo actuator to the mechanical flight-control surface linkage.
GTP 59: The GTP 59 OAT Probe provides outside air temperature measurement
which is used by the GDC 74A. Communication interface to the G1000 is
through the GDC 74A.

Page 1-6 G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
1.3 G1000 Block Diagrams
1.3.1 Typical System Interconnect
Figure 1-1 shows a typical Cessna Nav III G1000 system interconnect.
Figure 1-1. Typical Cessna Nav III G1000 System Interconnect

G1000 Nav III Line Maintenance Manual Page 1-7
190-00352-00 Rev. L
1.3.2 Flight Instrumentation
The GRS 77 AHRS, GDC 74A Air Data Computer, and GMU 44 Magnetometer are responsible for providing the
G1000 system with flight instrumentation. Data consist of aircraft attitude, heading, altitude, airspeed, vertical
speed, and outside air temperature information, all displayed on the PFD (data is displayed on the MFD in
reversionary mode).
Primary data outputs from the GRS and GDC are sent directly to the PFD via ARINC 429. Secondary data paths
connect the GRS to the MFD. Additional communications paths connect the GRS and GDC to both GIA units,
providing quadruple redundant interface.
The GRS 77 receives GPS data from both GIAs, airspeed data from the GDC, and magnetic heading from the
GMU. Using these three external sources, combined with internal sensor data, the GRS accurately calculates
aircraft attitude and heading.
Figure 1-2. G1000 Flight Instrumentation Data Paths

Page 1-8 G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
1.3.3 Navigation/Communication Systems
The GIAs contain VHF COM, VHF NAV, and GPS receivers. COM and NAV audio is sent via digital audio to
the GMA 1347 Audio Panel.
GPS information is sent to the GRS 77 AHRS and both displays for processing.
The GTX 33 Mode S Transponder communicates with both GIAs. Transponder data is sent from the GIAs to the
PFD.
The #2 GIA outputs analog HSI signals to the KAP 140 autopilot, if equipped. In the case of the GFC 700 both of
the GIAs communicate to the servos through RS-485, see Figure 1-1.
The GMA 1347 Audio Panel controls audio selections and the display reversionary mode.
Figure 1-3. G1000 Navigation/Communication Data Paths

G1000 Nav III Line Maintenance Manual Page 1-9
190-00352-00 Rev. L
1.4 User Interface
1.4.1 Control & Operation
All control and operation of G1000 equipment as normally used in flight occurs through the PFD, MFD or
GMA 1347 audio panel. Figure 1-4 identifies various GDU 104X buttons. See the appropriate G1000 Nav III
Cockpit Reference Guide, as well as the appropriate AFMS for more detail on control and operation of the
G1000.
Figure 1-4. GDU 104X Control Interface
1.4.2 GMA 1347 Control
Display Backup
Reversionary Button
Volume/Squelch
Control
ICS Isolation
Digital Recording Playback
Manual Squelch
Navigation Radio Audio
Navigation Radio Audio
Marker Beacon Signal Sensitivity
Marker Beacon/Mute
Speaker
Passenger Address
Split COM
Transmitters Transceiver Audio
Cellular Telephone
Figure 1-5. GMA 1347 Control Interface

Page 1-10 G1000 Nav III Line Maintenance Manual
Rev. L 190-00352-00
1.4.3 Configuration Mode Operation
The configuration mode exists to provide the installer or technician with a means of configuring, checking, and
calibrating various G1000 sub-systems. Troubleshooting/diagnostics information can also be derived from this
mode.
To start the system in Configuration Mode:
1. Press and hold the ENT key on the PFD while applying power.
2. Release the ENT key after ‘INITIALIZING SYSTEM’ appears in the upper left corner of the PFD.
3. Power on the MFD in the same manner. It is best to have both displays in the same mode.
NOTE
Configuration settings for each G1000 LRU must be adjusted on the PFD.
1.4.4 FMS Cursor
The FMS knob is the primary control for the G1000 system. Operation is similar to the Garmin 400/500 Series
units.
•To cycle through different configuration screens:
To change page groups: Rotate the large FMS knob.
To change pages in a group: Rotate the small FMS knob.
•To activate the cursor for a page, press the small FMS knob directly in, as one would push a regular
button.
•To cycle the cursor through different data fields, rotate the large FMS knob.
•To change the contents of a highlighted data field, rotate the small FMS knob. This action either brings
up an options menu for the particular field, or in some cases allows the operator to enter data for the field.
•To confirm a selection, press the ENT key.
•To cancel a selection, press the small FMS knob. Pressing the small FMS knob again, deactivates the
cursor. The CLR key may also be used to cancel a selection or deactivate the cursor.
Figure 1-6. FMS Control Knob