Table Of Contents - Garmin GTN 725 Maintenance Manual

1 G I
ENERAL NFORMATION
1.1 Scope................................................................................................................................................. 1-1
1.2 Unit Return........................................................................................................................................ 1-1
1.3 Related Publications.......................................................................................................................... 1-1
1.4 Warranty Information ....................................................................................................................... 1-1
1.5 Service Bulletins ............................................................................................................................... 1-1
1.6 Technical Specifications ................................................................................................................... 1-1
2 GTN 725/750 O
VERVIEW
2.1 Unit Interfaces................................................................................................................................... 2-2
2.2 Control and Operation Information................................................................................................... 2-4
2.3 Periodic Maintenance Instructions.................................................................................................... 2-4
3 T O
HEORY OF PERATION
3.1 Front Panel Assembly ....................................................................................................................... 3-1
3.2 Main Board ....................................................................................................................................... 3-1
3.3 WAAS Board .................................................................................................................................... 3-1
3.4 I/O Board........................................................................................................................................... 3-1
3.5 COM Board....................................................................................................................................... 3-1
3.6 NAV Board ....................................................................................................................................... 3-1
4 T
ROUBLESHOOTING
4.1 LRU Failure Annunciations .............................................................................................................. 4-1
4.2 System Messages .............................................................................................................................. 4-3
5 R R
EMOVAL AND EPLACEMENT
5.1 GTN 725/750 Unit Removal and Replacement ................................................................................ 5-2
5.2 GTN Removal with Damaged Jackscrew ......................................................................................... 5-3
5.3 Fan Removal and Replacement......................................................................................................... 5-4
5.4 I/O Chassis Removal and Replacement ............................................................................................ 5-5
5.5 Memory Battery Removal and Replacement .................................................................................... 5-6
5.6 Bottom Cover Removal and Replacement........................................................................................ 5-8
5.7 Knob Removal and Replacement...................................................................................................... 5-9
5.8 Internal Datacard Removal and Replacement................................................................................. 5-10
6 R S
ETURN TO ERVICE
7 S P L
ERVICE ARTS IST
A A C
PPENDIX ONNECTOR
A.1 J1001 Main Connector - Main Board .............................................................................................. A-2
A.2 J1002 Connector .............................................................................................................................. A-5
A.3 J1003 COM Connector (GTN 750 Only) ........................................................................................ A-6
A.4 J1004 NAV Connector (GTN 750 Only)......................................................................................... A-8
A.5 J1005 I/O Connector ...................................................................................................................... A-10
A B AFM/AFMS/POH C
PPENDIX
190-01007-01
Rev. 5

TABLE OF CONTENTS

................................................................................................................... 1-1
.................................................................................................................. 2-1
.................................................................................................................... 3-1
........................................................................................................................... 4-1
P
ROCEDURES
......................................................................................................................... 6-1
......................................................................................................................... 7-1
P I
INOUT NFORMATION
ONSIDERATIONS
.................................................................................. 5-1
................................................................................ A-1
.............................................................................. B-1
GTN 725/750 Maintenance Manual
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