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190-00067-25 Rev D i
TABLE OF CONTENTS
Section 1
DESCRIPTION AND OPERATION
Paragraph Page
1.1 INTRODUCTION.......................................................................................................1-1
1.2 GENERAL DESCRIPTION.........................................................................................1-1
1.3 DETAILED DESCRIPTION.........................................................................................1-2
1.3.1 Control Display Unit—CDU........................................................................................1-3
1.3.2 Main Board Assembly................................................................................................1-3
1.3.2.1CPU Board.................................................................................................................1-3
1.3.2.2CPU Power Supply Circuits........................................................................................1-4
1.3.3 GPS Receiver............................................................................................................1-5
1.3.4 Interface Board and Data Cards.................................................................................1-6
1.3.5 Altitude Decoder Board..............................................................................................1-6
Section 2
SPECIAL TOOLS AND TEST EQUIPMENT
2.1INTRODUCTION.............................................................................................................2-1
2.2SPECIAL TOOLS AND TEST EQUIPMENT....................................................................2-1
2.3TEST PANEL/TEST HARNESS.......................................................................................2-1
Section 3
TROUBLESHOOTING
3.1 INTRODUCTION.......................................................................................................3-1
3.2 TROUBLESHOOTING EQUIPMENT.........................................................................3-1
3.3 SELF-TEST FAILURES.............................................................................................3-1
3.4 INITIAL TROUBLESHOOTING..................................................................................3-3
3.4.1 Power Supply Check..................................................................................................3-3
3.4.2 Internal Clock Check..................................................................................................3-3