Garmin GNC 420 GPS Receiver User Manual

400 SERIES
MAINTENANCE MANUAL
(GNS¥430, GNC¥420, GPS 400)
GNS 430 Shown
GARMIN International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
190-00140-05, Revision C
October 2002
© Copyright 1999-2002
GARMIN Ltd. or its subsidiaries
All Rights Reserved
GARMIN International, Inc.
1200 East 151st Street, Olathe, Kansas 66062, U.S.A.
GARMIN (Europe) Ltd.
Unit 5, The Quadrangle, Abbey Park Industrial Estate, Romsey, SO51 9AQ, U.K.
GARMIN Corporation
No. 68, Jangshu 2nd Road, Shijr, Taipei County, Taiwan
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.
Information in this document is subject to change without notice. GARMIN reserves the right to change or
improve its products and to make changes in the content without obligation to notify any person or
organization of such changes or improvements.
GARMIN International, Inc.
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: 913-397-8200
Aviation Panel-Mount Technical Support Line (Toll Free): 1-888-606-5482
www.garmin.com
RECORD OF REVISIONS
REVISION
REVISION
DATE
Description
ECO #
A
07/06/99
Initial Release
-----
B
01/26/01
Redraw
15007
C
10/22/02
Redraw
19319
Insertion Date
By
GNC and GNS are trademarks of GARMIN Ltd. or its subsidiaries and may not be used without the express permission of GARMIN.
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400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
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(F) INDICATES FOLDOUT PAGES-PRINT ONE SIDE ONLY
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page i
Rev. C
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. Do not replace components inside the equipment when potentially lethal
voltages are present. 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
US $1,000,000 under Section 2410 of the Export Administration Act of 1979. Include this notice
with any reproduced portion of this document.
400 SERIES HARDWARE MOD LEVEL HISTORY
The following table identifies hardware modification (Mod) Levels for the 400 Series.
Mod Levels are listed with the associated service bulletin number, service bulletin date, and the
purpose of the modification. The table is current at the time of publication of this manual (see
date on front cover) and is subject to change without notice. Authorized GARMIN Sales and
Service Centers are encouraged to access the most up-to-date bulletin and advisory information
on the GARMIN Dealer Resource web site at www.garmin.com using their GARMIN-provided
user name and password.
Mod
Level
Service
Bulletin
Number
Service
Bulletin Date
Purpose of Modification
1
SB0019
Nov 7, 2000
14/28V only, Comm Transmitter Fuse
2
SB0101
Feb 16, 2001
14/28V only, Remote COM Transfer
3
SB0203
Feb 1, 2002
430/420; 14/28V only (-10 and –30), Receiver Audio
Compressor (recommended only if problem exists)
4
SB0207
Apr 2, 2002
430/420; Remove excessive solder from Comm Board vias
Page ii
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
Rev. C
TABLE OF CONTENTS
SECTION 1
DESCRIPTION AND OPERATION
Paragraph
Page
1.1 INTRODUCTION .................................................................................................... 1-1
1.1.1
Versions Covered by this Manual.................................................................... 1-1
1.2 FUNCTIONAL SUMMARY...................................................................................... 1-3
1.2.1
GPS 400.......................................................................................................... 1-3
1.2.2
GNC 420 ......................................................................................................... 1-3
1.2.3
GNS 430.......................................................................................................... 1-3
1.3 REPAIR PLAN ........................................................................................................ 1-4
1.4 SPECIFICATIONS.................................................................................................. 1-4
1.5 GENERAL DESCRIPTION ..................................................................................... 1-4
1.5.1
Main Board ...................................................................................................... 1-4
1.5.2
Com Board ..................................................................................................... 1-5
1.5.3
Nav Board ...................................................................................................... 1-5
1.5.4
GPS Module ................................................................................................... 1-5
1.5.5
Glideslope Board ............................................................................................ 1-6
1.5.6
Inverter Board.................................................................................................. 1-6
1.5.7
CDU Assembly ................................................................................................ 1-6
1.5.8
Map Board....................................................................................................... 1-6
SECTION 2
SPECIAL TOOLS AND TEST EQUIPMENT
Paragraph
Page
2.1 INTRODUCTION .................................................................................................... 2-1
2.2 SPECIAL TOOLS AND TEST EQUIPMENT .......................................................... 2-1
2.3 TEST PANELS AND CABLES................................................................................ 2-1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page iii
Rev. C
SECTION 3
TROUBLESHOOTING
Paragraph
Page
3.1 TROUBLESHOOTING EQUIPMENT ..................................................................... 3-1
3.2 TROUBLESHOOTING ORDER.............................................................................. 3-1
3.3 TROUBLESHOOTING PROCEDURES ................................................................. 3-2
3.3.1
Fuses............................................................................................................... 3-2
3.3.2
Power Supply Checks ..................................................................................... 3-4
3.3.2.1 Current Measurements.................................................................................... 3-4
3.3.2.2 Com Board ..................................................................................................... 3-5
3.3.2.3 Glideslope Board............................................................................................. 3-6
3.3.2.4 Nav Board ....................................................................................................... 3-6
3.3.3
Processor Clock Check ................................................................................... 3-6
3.3.3.1
Internal Clock CheckMain Processor........................................................... 3-6
3.3.3.2 Internal Clock CheckGPS Processor........................................................... 3-6
3.4 STATIC MESSAGES.............................................................................................. 3-7
3.5 TESTING FAILURES............................................................................................ 3-10
3.6 EXTERNAL CONNECTORS ................................................................................ 3-15
3.7 CONNECTOR I/O DESCRIPTIONS ..................................................................... 3-15
3.8 BLOCK DIAGRAM................................................................................................ 3-15
SECTION 4
DISASSEMBLY AND ASSEMBLY
Paragraph
Page
4.1 INTRODUCTION................................................................................................... 4-1
4.2 REQUIRED TOOLS .............................................................................................. 4-1
4.3 NAV DATA CARD REMOVAL AND INSERTION.................................................. 4-2
4.4 UNIT DESIGN ...................................................................................................... 4-3
4.5 DISASSEMBLY PROCEDURE ............................................................................. 4-3
4.5.1
Remove the Top Cover ................................................................................... 4-3
4.5.2
Remove the CDU Assembly ........................................................................... 4-3
4.5.2.1 Disassemble the CDU Assembly ................................................................... 4-4
4.5.3
Separate the Main and Nav Chassis............................................................... 4-4
4.5.4
Remove Faulty Boards from the Main Chassis Top Cavity ............................ 4-5
4.5.5
Remove Faulty Boards from the Main Chassis Underside Cavity................... 4-5
4.5.6
Remove Faulty Boards from the Nav Chassis ............................................... 4-6
4.6 REASSEMBLY ...................................................................................................... 4-7
4.7 MEMORY BATTERY REPLACEMENT................................................................. 4-7
4.7.1
Remove the Memory Battery........................................................................... 4-8
Page iv
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
Rev. C
SECTION 5
ALIGNMENT, CALIBRATION, AND TESTING
Paragraph
Page
5.1 INTRODUCTION ................................................................................................. 5-1
5.2 RECOMMENDED TEST EQUIPMENT ............................................................... 5-1
5.3 TEST SETUP....................................................................................................... 5-3
5.4 STANDARD SIGNALS AND TEST LOADS......................................................... 5-3
5.4.1
VHF Com Transceiver..................................................................................... 5-3
5.4.1.1 Standard Loads ............................................................................................... 5-3
5.4.1.2 Standard Signals ............................................................................................. 5-4
5.4.2
Glideslope ....................................................................................................... 5-4
5.4.2.1 Standard Loads ............................................................................................... 5-4
5.4.2.2 Standard Signals ............................................................................................. 5-4
5.4.3
NAV Receiver.................................................................................................. 5-5
5.4.3.1 Standard Loads ............................................................................................... 5-5
5.4.4
VOR Standard Signals .................................................................................... 5-6
5.4.4.1 Standard Test Signals ..................................................................................... 5-6
5.4.5
Localizer Standard Signals.............................................................................. 5-7
5.4.5.1 Standard Test Signals ..................................................................................... 5-7
5.5 ALIGNMENT ........................................................................................................ 5-9
5.6 CALIBRATION ..................................................................................................... 5-9
5.6.1
Com Setup Page Fields ................................................................................ 5-10
5.6.1.1 Com Frequency............................................................................................. 5-10
5.6.1.2 Frequency Spacing ....................................................................................... 5-10
5.6.1.3 SQ 250 .......................................................................................................... 5-10
5.6.1.4 SQ 833 .......................................................................................................... 5-10
5.6.1.5 Sidetone ........................................................................................................ 5-11
5.6.1.6 MIC Gain ....................................................................................................... 5-11
5.7 TEST PROCEDURES ....................................................................................... 5-12
5.7.1
Test Mode ..................................................................................................... 5-12
5.7.2
Com Testing .................................................................................................. 5-14
5.7.2.1 Power Input Check ........................................................................................ 5-14
5.7.2.2 RF Power Out................................................................................................ 5-15
5.7.2.3 Frequency Stability and Tolerance................................................................ 5-16
5.7.2.4 Modulation Capability Test ............................................................................ 5-16
5.7.2.5 Carrier Noise Level........................................................................................ 5-17
5.7.2.6 Demodulated Audio Distortion....................................................................... 5-17
5.7.2.7 Demodulated Audio Response...................................................................... 5-17
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page v
Rev. C
SECTION 5
ALIGNMENT, CALIBRATION, AND TESTING (continued)
5.7.2.8
5.7.2.9
5.7.2.10
5.7.2.11
5.7.2.12
5.7.2.13
5.7.2.14
5.7.2.15
5.7.2.16
5.7.2.17
5.7.2.18
5.7.2.19
5.7.2.20
5.7.2.21
5.7.3
5.7.3.1
5.7.3.2
5.7.3.3
5.7.3.4
5.7.3.5
5.7.3.6
5.7.3.7
5.7.3.8
5.7.3.9
5.7.3.10
5.7.3.11
5.7.3.12
5.7.3.13
5.7.3.14
5.7.3.15
5.7.3.16
5.7.3.17
5.7.3.18
5.7.3.19
Sidetone ........................................................................................................ 5-18
MIC Intercom Test......................................................................................... 5-18
Receiver Sensitivity ....................................................................................... 5-18
TX Interlock ................................................................................................... 5-19
AGC Test....................................................................................................... 5-19
Selectivity (25 kHz Mode) ............................................................................. 5-19
Selectivity (8.33 kHz Mode) .......................................................................... 5-20
Volume Control (Audio Output) ..................................................................... 5-21
Audio Distortion Test ..................................................................................... 5-21
Audio Frequency Response .......................................................................... 5-22
Receiver Audio Compressor Test ................................................................. 5-22
Squelch Test ................................................................................................. 5-23
Frequency Modulation................................................................................... 5-24
Com Remote Transfer Input.......................................................................... 5-24
Navigation Receiver Final Tests ................................................................... 5-25
Voice/Ident Audio Output Level..................................................................... 5-25
Voice/Ident Audio Frequency Response ....................................................... 5-25
Voice/Ident Audio Distortion .......................................................................... 5-26
VOR AGC...................................................................................................... 5-26
VOR Audio Sensitivity ................................................................................... 5-26
Receiver Quieting.......................................................................................... 5-27
Ident/Voice Tone Ratio.................................................................................. 5-27
Harmonic Distortion....................................................................................... 5-27
VOR Flag Sensitivity ..................................................................................... 5-28
LOC Flag Sensitivity...................................................................................... 5-28
VOR/LOC Composite Test ............................................................................ 5-28
VOR Course Deviation Sensitivity................................................................. 5-29
Localizer Course Deviation Sensitivity .......................................................... 5-29
TO-FROM Indicator....................................................................................... 5-29
Centering Accuracy ....................................................................................... 5-29
Course Deviation Accuracy Test ................................................................... 5-30
VOR OBS Bearing Accuracy ......................................................................... 5-30
Selectivity ...................................................................................................... 5-30
Spurious Response—VOR/LOC ................................................................... 5-31
Page vi
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
Rev. C
SECTION 5
ALIGNMENT, CALIBRATION, AND TESTING (continued)
5.7.4
5.7.4.1
5.7.4.2
5.7.4.3
5.7.4.4
5.7.4.5
5.7.4.6
5.7.4.7
5.7.4.8
5.7.4.9
5.7.4.10
5.7.5
5.7.5.1
5.7.5.2
5.7.5.3
5.7.5.4
5.7.5.5
5.7.5.6
5.7.5.7
5.7.5.8
5.7.5.9
5.7.5.10
5.7.5.11
5.7.5.12
5.7.6
5.7.6.1
5.7.6.2
5.7.6.3
5.7.6.4
5.7.6.5
5.7.6.6
5.7.6.7
5.7.6.8
5.7.6.9
5.7.6.10
5.7.6.11
5.7.6.12
5.7.6.13
Navigation Assembly I/O Tests .................................................................... 5-32
Localizer Course Deviation Test ................................................................... 5-32
To/From Deflection Output Characteristic Test ............................................. 5-32
To/From Deflection Accuracy Test ................................................................ 5-32
Course Deviation Flag Output Characteristic Test ........................................ 5-33
Course Deviation Flag Test........................................................................... 5-33
VOR/LOC Super Flag Output Test ................................................................ 5-33
NAV Input Lines ............................................................................................ 5-34
NAV OBI Outputs .......................................................................................... 5-34
Nav Serial DME Outputs ............................................................................... 5-35
NAV Parallel DME Outputs ........................................................................... 5-35
Glideslope Final Tests................................................................................... 5-37
Glideslope Course Deviation Output Characteristic Test .............................. 5-37
Course Deviation Deflection Accuracy Test .................................................. 5-37
Course Deviation Flag Test........................................................................... 5-37
Glideslope Superflag Output Test ................................................................. 5-38
Receiver Sensitivity ....................................................................................... 5-38
Centering Accuracy ....................................................................................... 5-39
AGC............................................................................................................... 5-39
Selectivity (Bandwidth) .................................................................................. 5-39
Nose Bandwidth ............................................................................................ 5-40
Skirt Bandwidth ............................................................................................. 5-40
Spurious Response ....................................................................................... 5-40
Status Tests .................................................................................................. 5-41
Main Board Final Tests ................................................................................. 5-42
Push Button Response.................................................................................. 5-42
Rotary Knobs................................................................................................. 5-42
Map ID and Data Card Test .......................................................................... 5-42
Photocell........................................................................................................ 5-43
Lighting Bus Input ......................................................................................... 5-43
Memory Battery Voltage................................................................................ 5-44
Display Pattern Test ...................................................................................... 5-45
Fan Test ........................................................................................................ 5-45
Unit Configuration Test.................................................................................. 5-45
GPS Antenna Bias ........................................................................................ 5-45
GPS Noise..................................................................................................... 5-45
Satellite Tracking Test................................................................................... 5-46
MAIN Lateral LEFT, RIGHT Outputs ............................................................. 5-47
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page vii
Rev. C
SECTION 5
ALIGNMENT, CALIBRATION, AND TESTING (continued)
5.7.6.14
5.7.6.15
5.7.6.16
5.7.6.17
5.7.6.18
5.7.6.19
5.7.6.20
5.7.6.21
5.7.6.22
5.7.6.23
5.7.6.24
5.7.6.25
MAIN Vertical UP, DOWN Outputs................................................................ 5-47
MAIN To/From Output ................................................................................... 5-47
MAIN Lateral Flag Output.............................................................................. 5-48
MAIN Vertical Flag Output............................................................................. 5-48
MAIN Lateral Super Flag Output ................................................................... 5-48
MAIN Vertical Super Flag Output .................................................................. 5-48
Annunciate Outputs....................................................................................... 5-49
OBI Serial Interface ....................................................................................... 5-50
Discrete Switch and Altitude Inputs............................................................... 5-51
ARINC 429 Transmitters and Receivers ....................................................... 5-52
RS232 Ports .................................................................................................. 5-53
OBS............................................................................................................... 5-54
SECTION 6
PARTS AND ASSEMBLIES
Paragraph
Page
6.1 INTRODUCTION .................................................................................................... 6-1
6.2 TABLES .................................................................................................................. 6-1
SECTION 7
ASSEMBLY DRAWINGS
7.1 INTRODUCTION .................................................................................................... 7-1
7.2 DRAWING LIST...................................................................................................... 7-1
Page viii
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
Rev. C
APPENDIX A
GNC 420A AND GNS 430A
A.1
A.2
A.3
A.4
A.5
A.6
A.7
DESCRIPTION ....................................................................................................A-1
‘A’ VERSION PART NUMBERS ..........................................................................A-1
TROUBLESHOOTING.........................................................................................A-1
DISASSEMBLY AND ASSEMBLY.......................................................................A-2
ALIGNMENT, CALIBRATION, AND TESTING....................................................A-2
REPLACEABLE PARTS AND ASSEMBLIES......................................................A-2
ASSEMBLY DRAWING .......................................................................................A-2
APPENDIX B
CONNECTOR I/O DESCRIPTIONS
B.1
B.2
B.3
B.4
B.5
B.6
B.7
B.8
B.9
B.10
B.11
B.12
B.13
I/O DESCRIPTION...............................................................................................B-1
INTERNAL AND EXTERNAL CONNECTORS ....................................................B-1
MAIN BOARD CONNECTORS............................................................................B-2
COM BOARD CONNECTORS ..........................................................................B-11
NAV BOARD CONNECTORS ...........................................................................B-12
GLIDESLOPE BOARD CONNECTORS............................................................B-15
KEYBOARD CONNECTORS ............................................................................B-15
INVERTER BOARD CONNECTORS ................................................................B-16
GPS MODULE CONNECTORS ........................................................................B-17
INTERFACE BOARD CONNECTORS ..............................................................B-17
DISPLAY MODULE CONNECTORS.................................................................B-18
DATA BASE CARD CONNECTORS .................................................................B-18
MAP BOARD CONNECTORS...........................................................................B-18
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page ix
Rev. C
LIST OF FIGURES
Figure
2-1
2-2
2-3
2-4
2-5
3-1
3-2
3-3
3-4
3-5
3-6
3-7
4-1
4-2
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
5-13
7-1
7-2
7-3
7-4
7-4
7-5
7-6
7-7
7-8
7-9
7-10
Page
Com Chassis Nut................................................................................................. 2-1
Signal And Load Drawing-J1 (Sheet 1 of 2) ........................................................ 2-3
Signal And Load Drawing-J1 (Sheet 2 of 2) ........................................................ 2-5
Signal And Load Drawing-J2 ............................................................................... 2-7
Signal And Load Drawing-J6 ............................................................................... 2-9
Main Board Fuse Locations ................................................................................. 3-2
Com Board Fuse Location/F600.......................................................................... 3-3
Com Board Fuse Location/F600 (Replaced by R611)......................................... 3-3
Nav Board Fuse Locations .................................................................................. 3-4
Processor Location (Main Board) ........................................................................ 3-7
External Connectors .......................................................................................... 3-15
400 Series Block Diagram ................................................................................. 3-17
Nav Data Card Installation And Removal ............................................................ 4-2
Memory Battery Location (Main Board) ............................................................... 4-7
40dB Attenuator Circuit........................................................................................ 5-3
Com Setup Page ................................................................................................. 5-9
R558 (Com Board)............................................................................................. 5-11
Test Pages......................................................................................................... 5-13
Modulation Measurement .................................................................................. 5-16
VOR/LOC/GS CDI Test Page ............................................................................ 5-32
Main Lighting and Main Analog Test Pages ...................................................... 5-44
GPS Test Page.................................................................................................. 5-45
Main CDI/OBS Configuration Test Page ........................................................... 5-47
Main Discrete Outputs Test Page...................................................................... 5-49
Main Discrete Inputs Test Page......................................................................... 5-51
Main Status/Loopback Test Page...................................................................... 5-52
Main CDI/OBS Configuration Page ................................................................... 5-54
Sub-Assembly, GNS 430 (Dwg. No. 015-00280-XX, Rev. P).............................. 7-3
Main Chassis Assembly, GNS 430(A) (Dwg. No. 015-00283-00, Rev. Q) .......... 7-5
Nav Chassis Assembly, GNC 400 (Dwg. No. 015-00282-00, Rev. K)................. 7-7
GNC 4XX CDU Assembly (Sheet 1 of 2) (Dwg. No. 015-00281-XX, Rev. F) ...... 7-9
GNC 4XX CDU Assembly (Sheet 2 of 2) (Dwg. No. 015-00281-XX, Rev. F) .... 7-11
Sub-Assembly, GNC 420 (Dwg. No. 015-00506-XX, Rev. N) ........................... 7-13
Main Chassis Assembly, GNC 420(A) (Dwg. No. 015-00283-01, Rev. J ) ........ 7-15
Sub-Assy, GNC 420 Nav Chas, W/O Nav (Dwg. No. 015-00282-01, Rev. E ). 7-17
Sub-Assy, GNC 420A (Dwg. No. 015-00837-XX, Rev. A ) ................................ 7-19
Main Chassis Assembly, GPS 400 (Dwg. No. 015-00283-03, Rev. J) .............. 7-21
Assy Dwg, GPS 400 (Dwg. No. 015-00504-XX, Rev. G)................................... 7-23
Page x
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
Rev. C
LIST OF TABLES
Table
1-1
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3-9
3-10
5-1
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-11
6-12
6-13
6-14
6-15
6-16
6-17
6-18
6-19
6-20
6-21
6-22
6-23
6-24
Page
Unit Configuration ................................................................................................ 1-1
Unit Board Power Supply Max Current Allowed .................................................. 3-5
Com Board Power Supply Tolerances................................................................. 3-5
Glideslope Board Power Supply Tolerances ....................................................... 3-6
Nav Board Power Supply Tolerances.................................................................. 3-6
Static Messages .................................................................................................. 3-8
Testing Failures-Main Board.............................................................................. 3-10
Testing Failures-COM Board ............................................................................. 3-12
Testing Failures-NAV Board .............................................................................. 3-13
Testing Failures-Glideslope ............................................................................... 3-13
Testing Failures-NAV Receiver ......................................................................... 3-14
Channel ID And Frequency ............................................................................... 5-14
Sub-Assy, GNS 430 28V, Black (Unit P/N 011-00280-00, Figure 7-1) ................ 6-4
Sub-Assy, GNS 430 14/28V, Black (Unit P/N 011-00280-10, Figure 7-1) ........... 6-4
Sub-Assy, GNS 430 14/28V, Gray (Unit P/N 011-00280-30, Figure 7-1) ............ 6-5
Sub-Assy GNS 430A, 28V, Black (Unit P/N 011-00836-00, Figure 7-1).............. 6-5
Sub-Assy GNS 430A, 28V, Gray (Unit P/N 011-00836-10, Figure 7-1)............... 6-6
Main Chassis Assy, GNS 430, 14/28V (Unit P/N 011-00283-10, Figure 7-2)...... 6-7
Main Chassis, GNS 430, 14/28V, (Unit P/N 011-00283-30, Fig. 7-2).................. 6-8
Main Chassis Assy, GNS 430, 28V, (Unit P/N 011-00283-00, Fig. 7-2) .............. 6-9
Main Chassis Assy, GNS 430A, 28V (Unit P/N 011-00283-20, Figure 7-2) ...... 6-10
Nav Chassis Sub Assy, GNS 430/430A (Unit P/N 011-00282-00, Figure 7-3).. 6-11
Sub-Assy, CDU, GNS 430 Black (Unit P/N 011-00281-00, Figure 7-4)............. 6-12
Sub-Assy, CDU, GNS 430, Gray (Unit P/N 011-00281-04, Figure 7-4)............. 6-13
Sub-Assy, CDU, GNS 430A, Black (Unit P/N 011-00281-00, Figure 7-4) ......... 6-14
Sub-Assy, CDU, GNS 430A, Gray (Unit P/N 011-00281-04, Figure 7-4) .......... 6-15
Sub-Assy, GNC 420, 28V, Black (Unit P/N 011-00506-00, Figure 7-5)............. 6-16
Sub-Assy, GNC 420, 14/28V, Black (Unit P/N 011-00506-10, Figure 7-5)........ 6-16
Sub-Assy, GNC 420, 14/28V, Gray (Unit P/N 011-00506-30, Fig 7-5) .............. 6-17
Sub-Assy, GNC 420A, 28V, Black (P/N 011-00837-00, Figure 7-8).................. 6-17
Sub-Assy, GNC 420A, 28V, Gray (Unit P/N 011-00837-10, Figure 7-8) ........... 6-18
Main Chassis Assy, GNC 420, 28V (P/N 011-00283-01, Figure 7-6) ................ 6-19
Main Chassis Assy, GNC 420, 14/28V (Unit P/N 011-00283-11, Fig 7-6)......... 6-20
Main Chassis Assy, GNC 420, 14/28V DO (Unit P/N 011-00283-31, Fig 7-6) .. 6-21
Main Chassis Sub-Assy, GNC 420A, 28V (Unit P/N 011-00283-21, Fig 7-6).... 6-22
Nav Chassis Sub-Assy, GNC 420/420A (Unit P/N 011-00282-01, Figure 7-7) . 6-22
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page xi
Rev. C
LIST OF TABLES (con’t.)
Table
6-25
6-26
6-27
6-28
6-29
6-30
6-31
6-32
6-33
6-34
6-35
A-1
A-2
B-1
B-2
B-3
B-4
B-5
B-6
B-7
B-8
B-9
B-10
B-11
B-12
B-13
B-14
B-15
B-16
B-17
B-18
B-19
B-20
B-21
B-22
Page
Sub-Assy, CDU, GNC 420, Black (Unit P/N 011-00281-01, Figure 7-4) ........... 6-23
Sub-Assy, CDU, GNC 420, Gray (Unit P/N 011-00281-05, Figure 7-4) ............ 6-24
Sub-Assy, CDU GNC 420A, Black (Unit P/N 011-00281-01, Figure 7-4) ......... 6-25
Sub-Assy, CDU, GNC 420A, Gray (Unit P/N 011-00281-05, Figure 7-4) .......... 6-26
Sub-Assy, GPS 400, 14/28V Black (Unit P/N 011-00504-00, Figure 7-1) ......... 6-27
Sub-Assy, GPS 400, 14/28V Gray (Unit P/N 011-00504-10, Figure 7-1) ......... 6-27
Main Chassis Assy, GPS 400, 14/28V (Unit P/N 011-00283-03, Figure 7-9) .... 6-28
Main Chassis Assy, GPS 400, 14/28V, DO (Unit P/N 011-00283-33, Fig 7-9).. 6-28
Nav Chassis Sub-Assy, GPS 400 (Unit P/N 011-00281-03, Fig 7-7) ................ 6-28
Sub-Assembly, CDU, GPS 400, Black (Unit P/N 011-00281-03, Fig 7-4) ......... 6-29
Sub-Assembly, CDU, GPS 400, Gray (Unit P/N 011-00281-06, Fig 7-4) .......... 6-30
Unit Main Board Power Supply Maximum Current ..............................................A-1
Voltage and Current Supply Requirements .........................................................A-2
I/O Descriptions ...................................................................................................B-1
Internal and External Connectors ........................................................................B-1
J1 Descriptions ....................................................................................................B-2
J8 Descriptions ....................................................................................................B-4
J9 Descriptions ....................................................................................................B-5
J11 Descriptions ..................................................................................................B-5
J12 Descriptions ..................................................................................................B-6
J14 Descriptions ..................................................................................................B-7
J16 Descriptions ..................................................................................................B-9
J17 Descriptions ................................................................................................B-10
P13 Descriptions................................................................................................B-10
J2 Descriptions ..................................................................................................B-11
J26 Descriptions ................................................................................................B-12
J6 Descriptions ..................................................................................................B-12
J10 Descriptions ................................................................................................B-14
J24 Descriptions ................................................................................................B-14
J25 Descriptions ................................................................................................B-15
J13 Descriptions ................................................................................................B-15
J26 Descriptions ................................................................................................B-16
J27 Descriptions ................................................................................................B-17
J101 Descriptions ..............................................................................................B-17
P16 Descriptions................................................................................................B-18
Page xii
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
Rev. C
SECTION 1
DESCRIPTION AND OPERATION
1.1
INTRODUCTION
References made to the GNS 430 and the GNC 420 throughout
this manual equally apply to the GNS 430A and the GNC 420A
except where specifically noted.
This manual provides board-level maintenance information for the GARMIN 400 Series of
products. Table 1-1 shows each unit in the 400 series and their configurations. The system allows
the Main Processor software to recognize which of the optional components (VHF
Communications Transceiver, VOR/LOC receivers, and Glideslope receiver) are present.
Table 1-1. Unit Configuration
GPS 400
GNC 420
GNS 430
Main Processor
„
„
„
GPS Receiver
„
„
„
„
„
VHF Com Transceiver
VOR/ILS Localizer Receivers
„
ILS Glideslope Receiver
„
1.1.1
Versions Covered by this Manual
This manual applies to the GPS 400, GNC 420, and the GNS 430. It also applies to the
GNC 420A and the GNS 430A. The “A” identifies the 16 watt VHF COM transmitter as opposed
to the 10 watt version. Appendix A describes the GNC 420A and the GNS 430A. For ease of
identification, the following tables contain part number information relative to the different
versions of the 400 Series:
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 1-1
Rev. C
GPS 400:
UNIT P/N
COLOR
011-00504-00
Black
011-00504-10
Gray
GNC 420:
UNIT P/N
COLOR
BLACK
OPERATING
VOLTAGE
28 V
MINIMUM
XMIT PWR
10 W
011-00506-00
011-00506-10
BLACK
14 or 28 V
10 W
011-00506-30
GRAY
14 or 28 V
10 W
GNS 430:
UNIT P/N
COLOR
OPERATING
VOLTAGE
MINIMUM
XMIT PWR
011-00280-00
BLACK
28 V
10 W
011-00280-10
BLACK
14 or 28 V
10 W
011-00280-30
GRAY
14 or 28 V
10 W
GNC 420A:
UNIT P/N
COLOR
OPERATING
VOLTAGE
MINIMUM
XMIT PWR
011-00837-00
BLACK
28 V only
16 W
011-00837-10
GRAY
28 V only
16 W
UNIT P/N
COLOR
OPERATING
VOLTAGE
MINIMUM
XMIT PWR
011-00836-00
BLACK
28 V only
16 W
011-00836-10
GRAY
28 V only
16 W
GNS 430A:
Page 1-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Each of the configurations includes a color display providing graphical moving map capability.
Navigation, communication, and mapping functions are supported by a navigation database
provided by a removable database card. The mapping function has additional support provided
by a built-in ground features base map which may be supplemented by a detailed map provided
on a second removable database card.
Information relative to the installation and operation of the 400 Series is found in the 400 Series
Installation Manual, P/N 190-00140-02.
1.2
FUNCTIONAL SUMMARY
1.2.1
GPS 400
ƒ
Position and velocity determination using signals transmitted by Global Positioning
System (GPS) Satellites.
ƒ
Display of the stored navigation and map database for use by the pilot/flight crew.
ƒ
Area navigation functions using the determined position/velocity and stored
navigation data.
ƒ
Approach navigation functions and the associated database.
ƒ
Interfacing with other flight instruments such as a moving map, autopilot, CDI/HSI
(including OBS), indicators, altitude encoder/serializer, fuel management system, and
annunciators.
14 or 28 volt operation.
ƒ
1.2.2
1.2.3
GNC 420
ƒ
Performs all functions of a GPS 400.
ƒ
Communications transceiver tuning from 118.000 to 136.9916 MHz in 25 kHz or
8.33 kHz increments.
ƒ
Com audio output.
ƒ
10 or 16-watt transmitter.
ƒ
14 or 28 volt operation for 10 watt transmitter;
28 V only for 16 watt transmitter.
GNS 430
ƒ
Performs all functions of a GNC 420.
ƒ
VOR and ILS Localizer Receivers.
ƒ
ILS Glideslope Receiver.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 1-3
Rev. C
1.3
REPAIR PLAN
This manual is designed to allow the user to perform board-level repair. If necessary, the unit can
be returned to GARMIN for complete service work. Contact GARMIN at the address given on
Page A (inside cover) for further service information.
1.4
SPECIFICATIONS
Technical specifications for each unit are given in the 400 Series Installation Manual,
P/N 190-00140-02.
1.5
GENERAL DESCRIPTION
To help understand the general description, Appendix B lists all
external and internal I/O signal descriptions for each unit. Also,
see Figure 3-7 for a block diagram, which shows all of the
external and internal connectors for each board.
1.5.1
Main Board
The Main Board is the functional center of the unit. The Main Board communicates with all the
components of the unit, and provides the interface with the pilot and other avionics installed in
the aircraft.
The Main Board performs the following functions:
1. Communicates with all components of the unit.
2. Displays and controls interface with the pilot.
3. Displays the navigation database via a removable memory card for use by the
pilot/flight crew.
4. Area navigation functions using the determined position/velocity and stored
navigation data.
5. Interfaces with other flight instruments such as a moving map autopilot, CDI/HSI,
indicators, altitude encoder, fuel management system, and annunciators.
Page 1-4
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
1.5.2
Com Board
The Com Board contains the VHF COM Transceiver that provides voice communication in the
118.000 to 136.992 MHz general aviation band. The transceiver consists of a 10 or 16 watt (“A”
versions) amplitude modulated transmitter (see the unit matrix tables on page 1-1), and a single
conversion superhetrodyne AM receiver. The 10 watt transmitters are Class 4 and 6 devices as
described in RTCA DO-186A, indicating that they have channel spacing modes of 25 kHz and
8.33 kHz, and are intended for a communications range of 100 nautical miles. The 16 watt
transmitters are class 3 and 5 devices as described in RTCA DO-186A, indicating that they have
channel spacing modes of 25 kHz and 8.33 kHz and are intended for a communications range of
200 nautical miles.
The receiver is a Class C and E device as described in RTCA DO-186A, indicating that it has
channel spacing modes of 8.33 kHz and 25 kHz, with offset carrier capability in 25 kHz mode.
The Com Board contains connectors J2 and J26. J4 is the Com BNC antenna connector.
1.5.3
Nav Board
The Nav Board contains the processor controlled navigation receiver for VOR and Localizer
signals from 108.00 MHz to 117.95 MHz in 50 kHz increments providing 200 channels.
Functionally, the Nav Board performs the following:
1. Tunes a VOR or localizer frequency as commanded by the Main Board.
2. Communicates VOR/LOC receiver sub-system status to the Main Board.
3. Communicates VOR radial or localizer deviation, TO/FROM flag state and
navigation flag state to the Main Board.
4. Drives horizontal deviation, flag and TO/FROM electrical outputs.
5. Receives glideslope data from the Main Board to be sent out in ARINC 429 format.
6. Toggles the VOR/LOC identifier filter as commanded by the Main Board.
7. Communicates to the Main Board the detection of a remote frequency transfer key
press.
8. Drives electrical outputs for OBI.
9. Channels a remote DME if connected to the VOR/LOC Receiver Board.
10. Transmits ARINC 429 labels.
11. Receives ARINC 429 labels.
12. Provides signal pass-through for G/S flags and drivers to NAV Board Connectors.
1.5.4
GPS Module
The GPS Module contains a twelve channel parallel receiver that is capable of tracking and using
up to twelve visible satellites for position, velocity, and time calculations. The GPS Receiver is
designed to operate with the GARMIN GA 56 antenna (P/N 011-00134-00). The GPS Module
interfaces with the Main Board via connector J101.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 1-5
Rev. C
1.5.5
Glideslope Board
The Glideslope Board contains a processor controlled Glideslope Receiver which operates from
329.15 MHz to 335.00 MHz in 150 kHz increments for 40 Glideslope channels.
1.5.6
Inverter Board
The Inverter Board supplies high voltage for display operation.
1.5.7
CDU Assembly
The main components of the CDU Assembly are the Liquid Crystal Display (LCD), Keyboard
Assembly, and the Interface Board. The display portion consists of a 3-color RGB DSTN type
LCD, 128 x 240 pixels. The keyboard assembly consists of the snap-dome keys, photocell and
LED’s for backlighting display operation. The Interface Board is simply an interconnect
containing no active components. Unit switches and volume pots are mounted in the CDU.
1.5.8
Map Board
The Map Board is physically connected to the Main Board via P16. The Map Board consists of a
map data storage device (ROM or flash). The map storage device contains base map data used to
store topographical information (highways, lakes, rivers, and railroads).
Page 1-6
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
SECTION 2
SPECIAL TOOLS AND TEST EQUIPMENT
2.1
INTRODUCTION
This section identifies the special tools and test equipment needed to maintain the 400 Series
Units. Standard equipment is not listed. For any questions regarding special tools and test
equipment contact GARMIN at the following address:
GARMIN
1200 E. 151st Street
Olathe, KS 66062 USA
Telephone: 913-397-8200
Aviation Panel Mount Technical Support Line (Toll Free): 1-888-606-5482
Website Address: www.garmin.com
2.2
SPECIAL TOOLS AND TEST EQUIPMENT
x
Test Panel—See paragraph 2.3.
x
Test Cables—See paragraph 2.3.
x
Thinly Ground Open End Wrench for removing COM BNC Chassis Nut (on units
with serial numbers of approximately 96303300 and lower).
Figure 2-1. COM Chassis Nut
2.3
TEST PANELS AND CABLES
Test panels and cables are to be supplied by the repair facility. Load and signal information
given in Figures 2-2 through 2-5 and the information listed in Appendix B can help in their
fabrication.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 2-1
Rev. C
This page left intentionally blank.
Page 2-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 2-2. J1 Signal and Load Drawing (Sheet 1 of 2)
Page 2-3 (Page 2-4 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140
Figure 2-3. J1 Signal and Load Drawing (Sheet 2 of 2)
Page 2-5 (Page 2-6 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 2-4. J2 Signal and Load Drawing
Page 2-7 (Page 2-8 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 2-5. J6 Signal and Load Drawing
Page 2-9 (Page 2-10 blank)
Rev. C
SECTION 3
TROUBLESHOOTING
Each unit in the 400 Series contains static sensitive components.
Observe proper anti-static procedures when testing the unit.
Hazardous voltages exist on the Inverter Board (all units).
Under normal operating conditions the voltages range up to
2500 Vac peak to peak. Under open circuit conditions voltages
can range over 8000 Vac peak to peak. Exercise extreme
caution during unit troubleshooting. Death or serious injury
could result from electrical shock. See other general
maintenance warnings and cautions on page ii.
3.1
TROUBLESHOOTING EQUIPMENT
The equipment used in testing a unit can be used to troubleshoot a faulty unit. See Sections 2 and
5.
3.2
TROUBLESHOOTING ORDER
Start troubleshooting a unit by following steps one through three listed below (not necessarily in
the order listed). Once it has been determined that these three items are not the cause of failure,
proceed with troubleshooting using the static messages and performance testing (paragraphs 3.4
and 3.5). To help in the troubleshooting process, a block diagram and external connectors are
shown at the end of this section. In addition, Appendix B describes all of the input/output signals
for all of the unit’s internal and external connectors.
1. Fuses (Paragraph 3.3.1).
2. Power Supply Checks (Paragraph 3.3.2).
3. Processor Clock Check (Paragraph 3.3.3).
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-1
Rev. C
3.3
TROUBLESHOOTING PROCEDURES
3.3.1
Fuses
Check for blown fuses on the Main Board, Com Board, and Nav Board as shown in Figures 3-1
through 3-4. If blown fuses are found, try to determine the cause of the fuse failure before
installing a new fuse.
F850
5A
F852
2A
F854
5A
F853
0.75A
F851
3A
Figure 3-1. Main Board Fuse Locations
Page 3-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
LOCATION OF
F600 (7A FUSE)
ON -00/-02/-03
COM BOARDS
Figure 3-2. Com Board Fuse Location/F600
LOCATION OF
F600 ON
-04 REV C
COM BOARDS
TO PRESENT
(F600 REPLACED
WITH R611, EXCEPT
ON -04 REV A AND B
BOARD)
Figure 3-3. Com Board Fuse Location/F600 (Replaced by R611)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-3
Rev. C
F501
1 AMP
F502
1 AMP
J6
Figure 3-4. Nav Board Fuse Locations
3.3.2
Power Supply Checks
3.3.2.1
Current Measurements
Taking intra-board and external current measurements is one way of determining a faulty board.
To measure the currents, use a spare ribbon cable and spread the cable wires, then use a DC probe
to measure the current in the appropriate wire (connector pin). The following external and
intra-board current measurements can be taken during troubleshooting (the intra-board currents
are given as reference):
x
Com Board (Tables 3-2 and 3-3):
J26: Intra-board (Main Board to Com Board)
J2: External Connector
x
Glideslope Board (Table 3-4):
J25: Intra-board (Nav Board to Glideslope Board)
x
Nav Board (Table 3-4):
J10: Intra-board (Main Board to Nav Board)
J6: External Connector
Page 3-4
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
The values listed in Table 3-1 are with the display backlight at maximum brightness.
Table 3-1. Unit Board Power Supply Max Current Allowed
Unit (Main Board)
Unit
Status
Max Current (A)
@ 13.8 V (Optional)
GPS 400
ON
0.66
1.32
GNC 420
ON
RX—0.99
TX—3.36
RX—1.98
TX—7.32
GNS 430
ON
RX—1.17
TX—3.98
RX—2.34
TX—7.96
ALL UNITS
OFF
0.014
0.011
16 Watt Units
3.3.2.2
Max Current (A)
@ 27.5 V
Unit Status Max Current (A)
@ 27.5 V
GNC 420A
ON
RX—0.99
TX—3.36
GNS 430A
ON
RX—1.17
TX—3.98
Com Board
Replace the Main Board if any voltage on the Com Board is not within tolerance. Replace the
Com Board if excessive current is measured.
Table 3-2. Com Board Power Supply Tolerances
Connector/Pin
Voltage (V)
Tolerance (V)
Max
Current
Conditions/Remarks
J26 Pin 5
+5
4.9 to 5.3
90 mA
J26 Pin 1
+12
11.5 to 13
420 mA
TX Mode
J26 Pin 2
-12
-16 to -11
35 mA
Receive Mode
J2 Pin 11 & 12
+11 to +33
J2 Pin 11 & 12
+13.75
15 mA
Receive Mode
1
r.2
6.0 A DC
TX Mode
(14/28V 10 Watt
Units Only)
1
J2 Pin 11 & 12
+27.5 (28V 10
Watt Units Only)
r.4
3.0 A DC1
TX Mode
J2 Pin 11 & 12
+27.5 (16 Watt
Units Only)
r.4
3.0 A DC1
TX Mode
Modulated transmitter operating into a 50 ohm load.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-5
Rev. C
3.3.2.3
Glideslope Board
Replace the Main Board if any voltage on the G/S Board is not within tolerance. Replace the G/S
Board if excessive current is measured.
Table 3-3. Glideslope Board Power Supply Tolerances
Connector/Pin
3.3.2.4
Voltage (V)
Tolerance (V)
Max Current
(mA)
Comments
J25 Pin 2
+ 5.1
r 0.2
100
91 mA typ
J25 Pin 1
+ 12.5
r 1.0
100
92 mA typ
J25 Pin 4
-12.5
r 2.0
12.5
10 mA typ
NAV Board
Replace the Nav Board if any voltage is not within tolerance or if excessive current is measured.
Table 3-4. Nav Board Power Supply Tolerances
Connector/Pin
Voltage (V)
Tolerance (V)
Max Current (mA)
J10 Pin 1
+ 12.5
r0.2
300
J10 Pin 2
+ 5.1
r0.1
200
J10 Pin 4
-12.5
r0.2
35
J6 Pin 44
+ 28
r5.0
1100
3.3.3
Processor Clock Check
3.3.3.1
Internal Clock Check—Main Processor
Measure the clock speed of the Main Processor (located on the Main Board, Figure 3-5) by
placing an oscilloscope probe at I100, pin 125 (remove the Map Board to gain access to I100).
The frequency should be approximately 32.7 MHz. If the clock is not operational, check J8-4 for
32.7 MHz (approximate). If the 32.7 MHz signal is present, replace the Main Board. If the Main
Board replacement does not repair the fault, replace the GPS Module.
3.3.3.2
Internal Clock Check—GPS Processor
Measure the clock speed of the GPS Processor (located on the Main Board, Figure 3-5) by
placing an oscilloscope probe at I1110, pin 125. The frequency should be approximately 32.7
MHz. If the clock is not operational, check J8-4 for 32.7 MHz (approximate). If the 32.7 MHz
signal is present, replace the Main Board. If the Main Board replacement does not repair the
fault, replace the GPS Module.
Page 3-6
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
I-1110
I-100
Figure 3-5. Processor Location (Main Board)
3.4
STATIC MESSAGES
The unit informs the user of operational status using the messages listed in Table 3-5. These
messages can help in isolating a faulty assembly. Table 3-5 also shows the recommended action
for each message. Perform the recommended actions in the order listed.
If the unit fails any of the power-up integrity checks, a Fatal
Error Page will be displayed. Replace the Main Board if this
message is displayed.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-7
Rev. C
Table 3-5. Static Messages
MESSAGE
RECOMMENDED ACTION
Stored data was lost
Replace Main Board (see paragraph 4.5.5)
Main processor requires service
Replace Main Board (see paragraph 4.5.5)
Memory battery low
Replace Memory Battery (see paragraph 4.7.1)
No differential GPS position
Replace GPS Module (see paragraph 4.5.5)
VLOC remote transfer key stuck
Replace NAV Receiver (see paragraph 4.5.6)
Display backlight failure
Replace Inverter Board (see paragraph 4.5.4)
Replace Main Board (see paragraph 4.5.5)
COM push-to-talk key stuck
Verify that Mic Key Line is not stuck before
replacing Com Board
Replace Com Board (see paragraph 4.5.4)
COM has failed
Replace Com Board (see paragraph 4.5.4)
Replace Main Board (see paragraph 4.5.5)
COM needs service
Replace Com Board (see paragraph 4.5.4)
COM transmitter power has been reduced
Verify that power input to J2-11, 12 has not
dropped below 26 V when transmitting before
replacing COM Board
Replace Com Board (see paragraph 4.5.4)
GPS is not responding
Replace Main Board (see paragraph 4.5.5)
G/S has failed
Replace G/S Board (see paragraph 4.5.6)
Replace Main Board (see paragraph 4.5.5)
G/S needs service
Replace G/S Board (see paragraph 4.5.6)
GPS stored data was lost
Replace Main Board (see paragraph 4.5.5)
Check unit cooling
Check Cooling Fan
No basemap data available
Replace Map Board (see paragraph 4.5.5)
Replace Main Board (see paragraph 4.5.5)
Data card write failure
Replace Interface Board (see paragraph 4.5.2.1)
Replace Flex Cable (see paragraph 4.5.2.1)
Replace Main Board (see paragraph 4.5.5)
Poor GPS coverage
Check Antenna and Cabling
Replace GPS Module (see paragraph 4.5.5)
Altitude input failure
Page 3-8
Rev. C
Replace Main Board (see paragraph 4.5.5)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 3-5. Static Messages (continued)
COM remote transfer key stuck
Verify that Remote Transfer Key Line is not stuck
before replacing COM Board
Replace Com Board (see paragraph 4.5.4)
Heading input failure
Replace Main Board (see paragraph 4.5.5)
CDI key stuck
Replace Flex Cable (see paragraph 4.5.2.1)
Replace Key Board (see paragraph 4.5.2)
Replace Main Board (see paragraph 4.5.5)
OBS key stuck
Replace NAV Receiver (see paragraph 4.5.6)
COM is not responding
Replace Com Board (see paragraph 4.5.4)
GPS has failed
Replace GPS Module (see paragraph 4.5.5)
GPS needs service
Replace GPS Module (see paragraph 4.5.5)
G/S is not responding
Replace G/S Receiver (see paragraph 4.5.6)
VLOC has failed
Replace NAV Receiver (see paragraph 4.5.6)
VLOC needs service
Replace NAV Receiver (see paragraph 4.5.6)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-9
Rev. C
3.5
TESTING FAILURES
Another approach in troubleshooting is to perform testing on a unit according to the test
procedures given in Section 5. To save time, only perform the minimum amount of testing in
order to isolate the suspect board. Table 3-6 lists recommended actions based on failures that
occur during testing. Perform the recommended actions in the order given in the table.
Table 3-6. Testing FailuresMain Board
TEST FAILURE
Push Button Response
TEST
PARAGRAPH
5.7.6.1
RECOMMENDED ACTION
Check Applicable Flex
Replace Map Board (see paragraph 4.5.5)
Replace Main Board (see paragraph 4.5.5)
Rotary Knobs
5.7.6.2
Check Applicable Flex
Replace Rotary Knob (see paragraph 4.5.2.1)
Replace Main Board (see paragraph 4.5.5)
Map I.D. and Data Card Test
5.7.6.3
Replace Map Board (see paragraph 4.5.5)
Replace Main Board (see paragraph 4.5.5)
Photocell
5.7.6.4
Check Applicable Flex
Replace Keyboard (see paragraph 4.5.2.1)
Replace Main Board (see paragraph 4.5.5)
Lighting Bus Input
5.7.6.5
Replace Main Board (see paragraph 4.5.5)
Lighting Bus AC
5.7.6.5A
Replace Main Board (see paragraph 4.5.5)
Lighting Bus DC
5.7.6.5B
Replace Main Board (see paragraph 4.5.5)
Memory Battery Voltage
5.7.6.6
Replace Memory Battery (see paragraph 4.7.1)
Display Pattern Test
5.7.6.7
Check Applicable Flex
Replace LCD (see paragraph 4.5.2.1)
Replace Main Board (see paragraph 4.5.5)
Fan Test
5.7.6.8
Replace Fan
Check Applicable Flex
Replace Map Board (see paragraph 4.5.5)
Replace Main Board (see paragraph 4.5.5)
Unit Configuration Test
Page 3-10
Rev. C
5.7.6.9
Replace Main Board (see paragraph 4.5.5)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 3-6. Testing FailuresMain Board (continued)
TEST FAILURE
TEST
PARAGRAPH
RECOMMENDED ACTION
GPS Antenna Bias
5.7.6.10
Replace GPS Module (see paragraph 4.5.5)
GPS Noise
5.7.6.11
Replace GPS Module (see paragraph 4.5.5)
Replace Main Board (see paragraph 4.5.5)
Satellite Tracking Test
5.7.6.12
Replace GPS Module (see paragraph 4.5.5)
Replace Main Board (see paragraph 4.5.5)
Main Lateral Left, Right Outputs
5.7.6.13
Replace Main Board (see paragraph 4.5.5)
Main Vertical Up, Down Outputs
5.7.6.14
Replace Main Board (see paragraph 4.5.5)
Main To/From Output
5.7.6.15
Replace Main Board (see paragraph 4.5.5)
Main Lateral Flag Output
5.7.6.16
Replace Main Board (see paragraph 4.5.5)
Main Vertical Flag Output
5.7.6.17
Replace Main Board (see paragraph 4.5.5)
Main Lateral Super Flag Output
5.7.6.18
Replace Main Board (see paragraph 4.5.5)
Main Vertical Super Flag Output
5.7.6.19
Replace Main Board (see paragraph 4.5.5)
Annunciate Outputs
5.7.6.20
Replace Main Board (see paragraph 4.5.5)
OBI Serial Interface
5.7.6.21
Replace Main Board (see paragraph 4.5.5)
Discrete Switch and Altitude Inputs
5.7.6.22
ARINC 429 Xmit and Rcvr
5.7.6.23
Replace Main Board (see paragraph 4.5.5)
429 RX 1 and 2 Low Speed
5.7.6.23A
Replace Main Board (see paragraph 4.5.5)
429 RX 1 and 2 High Speed
5.7.6.23A
Replace Main Board (see paragraph 4.5.5)
GPS RS232 1
5.7.6.24A
Replace Main Board (see paragraph 4.5.5)
GPS RS232 2
5.7.6.24B
Replace Main Board (see paragraph 4.5.5)
GPS RS232 3
5.7.6.24C
Replace Main Board (see paragraph 4.5.5)
GPS RS232 4
5.7.6.24D
Replace Main Board (see paragraph 4.5.5)
5.7.6.25
Replace Main Board (see paragraph 4.5.5)
OBS
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-11
Rev. C
Table 3-7. Testing FailuresCOM Board
TEST FAILURE
Power Input Check
TEST PARAGRAPH
RECOMMENDED ACTION
5.7.2.1
Replace Main Board (see paragraph 4.5.5)
Replace Com Board (see paragraph 4.5.4)
RF Power Out
5.7.2.2
Replace Com Board (see paragraph 4.5.4)
Frequency Stability and
Tolerance
5.7.2.3
Replace Com Board (see paragraph 4.5.4)
Modulation Capability Test
5.7.2.4
Replace Com Board (see paragraph 4.5.4)
Carrier Noise Level
5.7.2.5
Replace Com Board (see paragraph 4.5.4)
Demodulated Audio Distortion
5.7.2.6
Replace Com Board (see paragraph 4.5.4)
Demodulated Audio Response
5.7.2.7
Replace Com Board (see paragraph 4.5.4)
Sidetone
5.7.2.8
Replace Com Board (see paragraph 4.5.4)
Mic Intercom Test
5.7.2.9
Replace Com Board (see paragraph 4.5.4)
Receiver Sensitivity
5.7.2.10
Replace Com Board (see paragraph 4.5.4)
TX Interlock
5.7.2.11
Replace Com Board (see paragraph 4.5.4)
AGC Test
5.7.2.12
Replace Com Board (see paragraph 4.5.4)
Selectivity—25 kHz Mode
5.7.2.13
Replace Com Board (see paragraph 4.5.4)
Selectivity—8.33 kHz Mode
5.7.2.14
Replace Com Board (see paragraph 4.5.4)
Volume Control (Audio Output)
5.7.2.15
Replace Com Board (see paragraph 4.5.4)
Audio Distortion Test
5.7.2.16
Replace Com Board (see paragraph 4.5.4)
Audio Frequency Response
5.7.2.17
Replace Com Board (see paragraph 4.5.4)
Receiver Audio Compressor Test
5.7.2.18
Replace Com Board (see paragraph 4.5.4)
Squelch Test
5.7.2.19
Replace Com Board (see paragraph 4.5.4)
Com Remote Transfer Input
5.7.2.20
Replace Com Board (see paragraph 4.5.4)
Page 3-12
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 3-8. Testing FailuresNAV Board
TEST FAILURE
TEST
PARAGRAPH
RECOMMENDED ACTION
Localizer Course Deviation Test
5.7.4.1
Replace Nav Receiver Board (see paragraph 4.5.6)
To/From Deflection Output
Characteristic Test
5.7.4.2
Replace Nav Receiver Board (see paragraph 4.5.6)
To/From Deflection Accuracy Test
5.7.4.3
Replace Nav Receiver Board (see paragraph 4.5.6)
Course Deviation Flag Output
Characteristic Test
5.7.4.4
Replace Nav Receiver Board (see paragraph 4.5.6)
Course Deviation Flag Test
5.7.4.5
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR/LOC Super Flag Output Test
5.7.4.6
Replace Nav Receiver Board (see paragraph 4.5.6)
Nav Input Lines
5.7.4.7
Replace Nav Receiver Board (see paragraph 4.5.6)
Nav OBI Outputs
5.7.4.8
Replace Nav Receiver Board (see paragraph 4.5.6)
Nav Serial DME Outputs
5.7.4.9
Replace Nav Receiver Board (see paragraph 4.5.6)
Nav Parallel DME Outputs
5.7.4.10
Replace Nav Receiver Board (see paragraph 4.5.6)
Table 3-9. Testing FailuresGlideslope
TEST FAILURE
TEST PARAGRAPH
RECOMMENDED ACTION
G/S Course Deviation Output
Characteristic Test
5.7.5.1
Replace Glideslope Board (see paragraph 4.5.6)
Course Deviation Deflection
Accuracy Test
5.7.5.2
Replace Glideslope Board (see paragraph 4.5.6)
Course Deviation Flag Test
5.7.5.3
Replace Glideslope Board (see paragraph 4.5.6)
G/S Superflag Output Test
5.7.5.4
Replace Glideslope Board (see paragraph 4.5.6)
Receiver Sensitivity
5.7.5.5
Replace Glideslope Board (see paragraph 4.5.6)
Centering Accuracy
5.7.5.6
Replace Glideslope Board (see paragraph 4.5.6)
AGC
5.7.5.7
Replace Glideslope Board (see paragraph 4.5.6)
Selectivity (Bandwidth)
5.7.5.8
Replace Glideslope Board (see paragraph 4.5.6)
Nose Bandwidth
5.7.5.9
Replace Glideslope Board (see paragraph 4.5.6)
Skirt Bandwidth
5.7.5.10
Replace Glideslope Board (see paragraph 4.5.6)
Spurious Response
5.7.5.11
Replace Glideslope Board (see paragraph 4.5.6)
Status Tests
5.7.5.12
Replace Glideslope Board (see paragraph 4.5.6)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-13
Rev. C
Table 3-10. Testing FailuresNAV Receiver
TEST FAILURE
TEST PARAGRAPH
RECOMMENDED ACTION
Voice/Ident Audio Output Level
5.7.3.1
Replace Nav Receiver Board (see paragraph 4.5.6)
Voice/Ident Audio Frequency
Response
5.7.3.2
Replace Nav Receiver Board (see paragraph 4.5.6)
Voice/Ident Audio Distortion
5.7.3.3
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR AGC
5.7.3.4
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR Audio Sensitivity
5.7.3.5
Replace Nav Receiver Board (see paragraph 4.5.6)
Receiver Quieting
5.7.3.6
Replace Nav Receiver Board (see paragraph 4.5.6)
Ident/Voice Tone Ratio
5.7.3.7
Replace Nav Receiver Board (see paragraph 4.5.6)
Harmonic Distortion
5.7.3.8
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR Flag Sensitivity
5.7.3.9
Replace Nav Receiver Board (see paragraph 4.5.6)
LOC Flag Sensitivity
5.7.3.10
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR/LOC Composite Test
5.7.3.11
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR Course Deviation
Sensitivity
5.7.3.12
Replace Nav Receiver Board (see paragraph 4.5.6)
Localizer Course Deviation
Sensitivity
5.7.3.13
Replace Nav Receiver Board (see paragraph 4.5.6)
TO-FROM Indicator
5.7.3.14
Replace Nav Receiver Board (see paragraph 4.5.6)
Centering Accuracy
5.7.3.15
Replace Nav Receiver Board (see paragraph 4.5.6)
Course Deviation Accuracy Test
5.7.3.16
Replace Nav Receiver Board (see paragraph 4.5.6)
VOR OBS Bearing Accuracy
5.7.3.17
Replace Nav Receiver Board (see paragraph 4.5.6)
Selectivity
5.7.3.18
Replace Nav Receiver Board (see paragraph 4.5.6)
Spurious Response—VOR/LOC
5.8.5.19
Replace Nav Receiver Board (see paragraph 4.5.6)
Page 3-14
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
3.6
EXTERNAL CONNECTORS
Figure 3-6 shows the external connectors and their corresponding pin numbers for each unit.
3
2
1
14
15
4
16
5
6
17
18
8
7
19
9
11
10
22
21
20
23
12
60
40
61
62
63
64
65
66
41
42
43
44
45
46
22
21
1
15
14
30
13
29
44
12
28
43
11
27
42
10
26
41
9
25
40
39
38
7
23
37
23
3
2
8
24
13
25
24
6
22
36
24
4
6
5
5
21 20
35
26
25
4
3
34
2
18
33
48
28
8
7
19
69
70
71
72
73
74
75
76
77 78
49
50
51
52
53
54
55
56
57
67 68
47
27
9
31
30
29
10
11
12
32
33
13
34
14
35
15
36
16
37
17
38
18
58
59
39
19
20
1
17
32
16
31
Figure 3-6. External Connectors
3.7
CONNECTOR I/O DESCRIPTIONS
Appendix B contains the pin names, numbers and a brief input/output description for the external
and internal connectors of each 400 Series unit.
3.8
BLOCK DIAGRAM
Figure 3-7 shows a block diagram for the unit that can be used to help troubleshoot the unit.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 3-15
Rev. C
This page left intentionally blank.
Page 3-16
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 3-7. 400 Series Block Diagarm
Page 3-17 (Page 3-18 blank)
Rev. C
SECTION 4
DISASSEMBLY AND ASSEMBLY
4.1
INTRODUCTION
Repairing the unit is accomplished by removing and replacing defective boards. To help
disassemble and reassemble the unit in order to access the boards, look at the assembly drawings
in Section 7 and the parts lists in Section 6.
Each unit in the 400 Series contains static sensitive components.
Observe proper anti-static procedures when testing the unit.
Do not replace assemblies with the unit turned on. Hazardous
voltages exist on the Inverter Board (Figure 7-2, Item
012-00256-00).
Under normal operating conditions the
voltages range up to 2500 V ac peak to peak. Under open
circuit conditions voltages can range over 8000 V ac peak to
peak. Remove all power to the unit and wait at least six
minutes before starting disassembly. Death or serious injury
could result from electrical shock.
4.2
REQUIRED TOOLS
Standard shop equipment can be used to remove and replace defective boards.
The 400 Series 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 an eyeglass lens cleaner which
is specified as safe for anti-reflective coatings and a clean, lintfree cloth.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 4-1
Rev. C
4.3
NAV DATA CARD REMOVAL AND INSERTION
Before disassembly begins, remove the Jeppesen NavData® card supplied with the unit. The
card can be installed or removed when the unit is on or off. Insert the card with the swing arm
handle at the bottom and the label facing to the left (see Figure 4-1).
To remove the NavData Card:
1. Gently press on the tab using a slight upward motion at the front center of the
NavData card. This will partially deploy the swing arm handle.
2. Rotate the swing arm handle upward (and outward) until it locks into place,
perpendicular to the face of the unit. Grasp the top and bottom surfaces of the swing
arm handle, between your thumb and forefinger, and pull directly away from the face
of the unit to unseat the connector and remove the NavData card.
To insert the NavData card:
1. Place the card into the NavData card slot, with the label facing to the left and the
swing arm handle at the bottom front.
2. Press the NavData card into place until it seats on the internal connector and the front
of the card is flush with the face of the unit. If the swing arm handle is up, gently
lower the handle and push it into place flush with the face of the unit.
Figure 4-1. Nav Data Card Installation and Removal
CAUTION
Do not remove the Mylar¥ insulators. They prevent the shorting
out of boards and board components. The insulators may be
ordered if damaged (See Section 6, Replaceable Parts).
Page 4-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
4.4
UNIT DESIGN
Each unit consists of a Main and Nav Chassis, CDU Assembly, and a Top Cover. The Main
Chassis has a Top and Underside Cavity which contains replaceable boards. The following is a
typical order of disassembly:
1.
2.
3.
4.
5.
6.
7.
8.
4.5
Remove the Top Cover.
Remove the CDU Assembly.
Disassemble the CDU Assembly.
Separate the Main and Nav Chassis.
Remove Defective Boards from the Main Chassis Top Cavity.
Remove Defective Boards from the Main Chassis Underside Cavity.
Remove Defective Boards from the Nav Chassis.
Replace the Memory Battery.
DISASSEMBLY PROCEDURE
Because each unit is very similar in design, only the GNS 430 disassembly procedure is given in
this section. The disassembly procedures are provided in modular sequence to enable disassembly
of the unit only to the extent required to perform repairs. Refer to Sections 6 and 7 for parts lists
and illustrations to help in the disassembly of the unit being repaired.
4.5.1
Remove the Top Cover (Figure 7-1)
Remove two screws (211-60234-06) and two screws (211-63234-10) and remove the Top
Cover (115-00218-00) (shields (253-00062-02) and (253-00062-01) will be removed
with the cover).
4.5.2
Remove the CDU Assembly (Figure 7-1)
1. Remove four screws (211-63234-10).
2. Disconnect the two flex cables (C and D) from the Main Board.
3. Disconnect wires from the Inverter Board (see Figure 7-2, P/N 012-00256-00).
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 4-3
Rev. C
4.5.2.1
Disassemble the CDU Assembly
x
Remove the Flex Assemblies (Figure 7-4)
1. Remove the VOL w/’C’ and VOL w/’V’ Knobs (18 and 19).
2. Remove the Push ‘CRSR’ and Push ‘C/V’ knobs (21, 22, 20, and 28).
3. Remove the Hex Nuts holding the Push ‘CRSR’ and Push ‘C/V’ shafts to the
CDU Bezel (13).
4. Disconnect the Flex Assembly (25) from the LCD (9).
5. Back the Flex Assembly (25) out of the Bezel.
6. Remove the two screws (2) attaching the Interface Board (5) to the CDU Bezel
(13).
7. Back the Flex Assembly (26) out of the Bezel.
x
Remove the Interface Board (Figure 7-4)
Remove the two Hex Nuts (6 and 31) holding the Rotary Pots (3 and 4) to the
Interface Board (5) and slide the Interface Board off the Pot Shafts.
x
Remove the LCD Assembly (Figure 7-4)
Remove the four screws (2) holding the LCD Assembly (9) to the Bezel (13).
x
Remove the Inlay Lens and Keyboard PCB (Figure 7-4)
Remove the five screws (12) and pop the Inlay Lens out and remove the Keyboard
PCB (15) from the CDU Bezel (13).
4.5.3
Separate the Main and Nav Chassis (Figure 7-1)
1. Remove two screws (211-60237-10).
2. Loosen the rear hinge Special Shoulder Screws (211-00052-00) from the Main
Chassis (011-00283-X0) and fold the Nav Chassis (011-00282-00) over. To totally
separate the chassis, remove the threaded Hinge Pins (211-00054-00) from the Nav
Chassis using a .050 (1.3 mm) Hex Driver Tool.
3. Disconnect the ribbon cable (325-00063-00).
4. Disconnect the fan power leads from the Main Chassis.
Page 4-4
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
4.5.4
Remove Faulty Boards from the Main Chassis Top Cavity
Remove the Top Cover (see paragraph 4.5.1) to access the Main Chassis Top Sub-assemblies.
x
COM Board (Figure 7-2)
Steps 5 and 6 apply to 28V/10W units only. 14/28V and
28V/16W units have no posistor, no brass spacers, and use two
screws to hold down the PA transistor.
1. Remove the Com Board Covers (115-00203-00, 115-00205-00 and
115-00207-00).
2. Unsolder the wire from Coax Cable Connector (330-00070-04).
3. Remove two screws (211-63234-10) attaching the 25-pin connector to the Main
Chassis (125-00034-01).
4. Remove three screws (211-60234-06) securing the Com Board (012-00214-XX)
to the Main Chassis (125-00034-01).
5. Remove screw (211-60234-06) attaching the Posistor (925-D2120-00) to the Hex
Standoff (214-00023-00) on one side of the transistor.
6. Remove two Hex Standoffs (214-00023-00) on each side of the transistor using a
0.187-inch (3/16”) hex socket tool and remove Com Board.
x
Inverter Board (Figure 7-2)
1. Disconnect the wire connector from the Inverter Board (012-00256-00).
2. Remove three Screws (211-60234-06) and remove the Inverter Board
(012-00256-00).
4.5.5
Remove Faulty Boards from the Main Chassis Underside Cavity
To access the bottom sub-assemblies, hinge open the Main Chassis from the Nav Chassis
(paragraph 4.5.3).
x
Map Board (Figure 7-2)
Remove the screw (211-60234-11) attaching the Map Board (012-00296-00) to
the Main Board (012-00347-3X) and lift the Map Board off the Connector.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 4-5
Rev. C
x
GPS Module (Figure 7-2)
1. Disconnect the Ribbon Cable from the GPS Module (011-00474-XX).
2. Remove screw (211-60234-11) attaching the Map Board (012-00296-00) to
the Main Chassis (125-00034-01). Remove 3 of 5 screws (211-63234-10)
attaching GPS Module (011-00474-XX) to the Main Chassis (125-00034-01)
and remove the GPS Module.
x
Main Board (Figure 7-2)
1. Remove the CDU Assembly (paragraph 4.5.2).
2. Remove the Map Board (paragraph 4.5.5).
3. Remove GPS Module (paragraph 4.5.5).
4. Remove the two screws (211-63234-10) attaching the 78-pin connector to the
Main Chassis (125-00034-01).
5. Remove the five screws (211-60234-06) attaching the Main Board (01200347-XX) to the Main Chassis (125-00034-01).
4.5.6
Remove Faulty Boards from the Nav Chassis
x
Nav Receiver Board (Figure 7-3)
To access the bottom sub-assemblies, separate the Main Chassis from the Nav
Chassis according to the instructions given in paragraph 4.5.3.
1. Remove the Module Cover (115-00214-00). Disconnect the Ribbon Cable
(325-00063-01) from the Nav Receiver Board (012-00195-XX).
2. Remove the RF Fence Cover (115-00213-00).
3. Unsolder the wire from the Coax Connector (330-00070-03).
4. Remove five screws (211-60234-04) attaching Nav Receiver Board
(012-00195-XX) to Nav Chassis (125-00035-00).
5. Remove the two screws (211-63234-10) attaching the 44-pin connector to
Nav Chassis (125-00035-00) and remove the Nav Receiver Board
(012-00195-XX).
Page 4-6
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
x
Glideslope Board (Figure 7-3)
1. Remove the Glideslope Board Cover (115-00221-00).
2. Disconnect the Ribbon Cable (325-00063-01) from the Glideslope Board (01200212-XX).
3. Unsolder the connector wire from the Coax Connector (330-00070-03).
4. Remove the three screws (211-60234-04) attaching the Glideslope Board (01200212-XX) to the Nav Chassis (125-00035-00) and remove the Glideslope Board
(012-00212-XX).
4.6
REASSEMBLY
Reverse the removal instructions to reinstall an assembly. Note: Ensure that Loctite• is used on
screws during reassembly.
4.7
MEMORY BATTERY REPLACEMENT
Each unit uses a 3 V built-in lithium battery to maintain user waypoints/settings stored in RAM.
This battery has an operational life of up to 5 years. Should the battery require replacement, as
indicated by the Memory Battery Low message, partial disassembly of the unit will be required to
access the battery. When replacing the memory battery, all user waypoints/settings may be lost.
If this occurs, the message Stored Data Lost will be displayed. The unit must then be attached to
an antenna, allowed to search the sky and collect new almanac data before it will be usable again.
This process may take 20-30 minutes. Before beginning replacement of the memory battery,
transfer all waypoints and routes to a user data card so that they may be transferred back to the
unit following battery replacement.
MEMORY
BATTERY
B-170
Figure 4-2. Memory Battery Location (Main Board)
4.7.1
Remove the Memory Battery
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 4-7
Rev. C
1. Remove the Main Board (paragraph 4.5.5).
2. Remove all electrical grounds from the unit, so if using a grounded tip soldering
iron, the battery will not be shorted upon removal.
3. Unsolder the battery leads from the bottom side of the Main Board.
4. Carefully remove the battery by pulling it out from the topside of the Main Board.
The battery leads are welded to the battery and cannot be removed.
5. Install a new battery and solder the leads from the bottom side of the Main Board.
6. Reinstall the Main Board.
7. Turn the unit on.
8. Verify the Memory Battery Low message does not appear.
9. Turn the unit off and carefully turn the unit over.
10. Verify the memory battery voltage (measure from positive side of the battery to
ground) is at least 2.9 VDC.
______OK
Page 4-8
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
SECTION 5
ALIGNMENT, CALIBRATION, AND TESTING
5.1
INTRODUCTION
This section provides unit-level alignment, calibration, and testing information for the 400 Series
units. The procedures in this section can be performed before troubleshooting begins to help
identify a faulty board, or as a return to service test after repair has been completed. All tests can
be performed without accessing the inside of the unit.
This unit contains static sensitive devices. Service personnel
must ensure that proper precautions are taken to prevent damage
to this equipment from Electro Static Discharge (ESD). Testing
should only be accomplished in an approved ESD workstation
by properly trained and grounded personnel.
Hazardous voltages exist on the Inverter Board (all units).
Under normal operating conditions the voltages range up to
2500 Vac peak to peak. Under open circuit conditions voltages
can range over 8000 Vac peak to peak. Exercise extreme
caution during unit testing. Death or serious injury could
result from electrical shock.
5.2
RECOMMENDED TEST EQUIPMENT
Test cables and a test panel are supplied by the authorized repair
station. Load and signal information given in Section 2 and
Appendix B can be used to aid in their fabrication. Suitable
substitutes can be used for the recommended test equipment
listed on page 5-2.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-1
Rev. C
Avionics Signal GeneratorIFR or Marconi 2030 w/options one and six.
BF Goodrich Precision Track Selector
Digital Voltmeter—HP 34401A
GPS Antenna—GARMIN GA56 (P/N 010-10040-01)
Power Supply capable of 10-33 Volts @ 10 Amps—HP 6267B
Radio Test Set—HP 8920A
Modulation AnalyzerHP 8901
The RF Signal Generator must have at least a 0.2 parts per
million (ppm) accuracy and the phase noise must be at least
–104.5 dBc/Hz @ 7.37 KHz offset for measuring the 8.33 kHz
receiver selectivity.
The following equipment (or suitable substitutes) can be used in place of the radio test set:
50 Watt, 30 dB Attenuator for the output of the Bird Wattmeter
40 dB Attenuator Circuit—Shown in Figure 5-1
6 dB Attenuator CircuitMini-Circuits Model CAT-6
Crystal Detector—Narda 503-03
Frequency Counter—HP53131A
Oscilloscope—Tektronix TDS 3012
RF Signal Generator—IFR or Marconi 2030 with options 1 and 6.
RF Wattmeter—Bird 4431 with element 25C
Audio Distortion Analyzer—HP 8903B
Page 5-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
50 OHM LOAD
30 dB
50 WATT ATTENUATOR
BIRD
WATTMETER
UNIT UNDER
TEST
RF INPUT
NOTE
5 0 O H M L O A D IS N O T R E Q U IR E D
IF 3 0 d B AT T E N U AT O R IS U S E D .
T H E 3 0 d B AT T E N U AT O R W IL L
L O W E R T H E V S W R T O < 1 .1 :1
E V E N IF L E F T O P E N O N T H E
O U T P U T S ID E .
RF
ATTENUATOR
8.2k
51 OHMS
ATTENUATED
RF OUTPUT
Figure 5-1. 40 dB Attenuator Circuit
5.3
TEST SETUP
The test setup is configured by the repair station. Load and signal information given in Section 2
and Appendix B can aid in the test setup.
5.4
STANDARD SIGNAL AND TEST LOADS
The following section describes the standard signal and loads for testing the 400 Series units.
5.4.1
VHF COM TRANSCEIVER
5.4.1.1 Standard Loads
Antennas
The VHF com transceiver shall operate with a conventional 50 ohm vertically polarized com
antenna. The transmitter shall be terminated into a 50 ohm resistive load capable of dissipating a
minimum of 50 watts and with a VSWR of not greater than 1.2:1.
Audio Load
The standard audio load shall be 500 ohms between COMM AUDIO HI J2-7 and COMM
AUDIO LO J2-19.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-3
Rev. C
5.4.1.2 Standard Signals
COM RF Level Units
All specifications given for the com transceiver are in HARD units. To arrive at these units
adjust the RF generator to the level specified and insert a 6 dB pad at the output of the RF
generator.
Standard Mic Input Signal
A 1000 Hz tone with 275 mVrms into a 500 ohm load.
5.4.2
Glideslope
5.4.2.1 Standard Loads
Glideslope Receiver Antenna
The Glideslope receiver antenna shall operate in 50 ohm load.
Course Deviation Deflection Load
One standard CDI deflection load shall be 1000 ohms.
Course Deviation Flag Load
One standard CDI flag load shall be 1000 ohms.
To/From Load
One standard TO/FROM load shall be 200 ohms.
5.4.2.2 Standard Signals
All RF input levels for the Glideslope receiver requirements are specified in dBm and do not
require a 6 dB attenuator on the output of the signal generator provided the signal generator is
calibrated into 50 ohms.
Standard Glideslope Test Signal
Standard Glideslope test signal is an RF carrier amplitude modulated simultaneously by 90 and
150 Hz tones so that the sum of their separate modulation levels is 80% ± 2%. The tones shall
have the following characteristics:
a. they shall be phase-locked in such a manner that their voltage waveforms simultaneously pass
through zero in the same direction.
b. the maximum simultaneous variation in frequency shall not exceed ± 0.3%.
c. the total harmonic content of each tone shall not exceed 3%.
d. the RF level shall be -56 dBm and have a frequency within 0.001% of the assigned carrier
frequency unless otherwise specified.
Page 5-4
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Standard Glideslope Centering Test Signal
Standard Glideslope centering test signal is a standard Glideslope test signal in which the
difference in depth of modulation of the 90 and 150 Hz signals is less than 0.002 ddm.
Standard Glideslope Deviation Test Signal
Standard Glideslope deviation test signal is a standard Glideslope test signal in which the
difference in depth of modulation of the 90 and 150 Hz signals is 0.091 ± 0.002 ddm.
Standard Glideslope Deflection
Standard Glideslope deflection shall be 52% (78 A)of center to full scale deflection (150 A),
when a standard Glideslope deviation test signal is applied at an RF level of –56 dBm.
5.4.3
NAV Receiver
5.4.3.1 Standard Loads
NAV Receiver Antenna
The NAV receiver antenna J5 shall operate in a 50 ohm load.
NAV Course Deviation Deflection Load (NAV +LEFT)
One standard CDI deflection load shall be 1000 ohms. Three standard loads shall be connected
between NAV +LEFT J6-5 and NAV +RIGHT (NAV COMMON) J6-6.
NAV Course Deviation Flag Load (NAV +FLAG)
One standard CDI flag load shall be 1000 ohms. Three standard loads shall be connected
between NAV +FLAG J6-3 and NAV -FLAG (NAV COMMON) J6-4.
NAV To/From Load (NAV +TO)
One standard To/From load shall be 200 ohms. Three standard loads shall be connected between
NAV +TO J6-1 and NAV +FROM (NAV COMMON) J6-2.
NAV Composite Video Load (NAV COMPOSITE OUT)
One standard composite video load shall be 10,000 ohms connected between NAV COMPOSITE
OUT J6-8 and GND J6-41.
NAV Super Flag Load (NAV SUPER FLAG OUT)
One standard super flag load shall be 56 ohms connected between NAV SUPER FLAG OUT J615 and GND J6-41.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-5
Rev. C
G/S Super Flag Load (G/S SUPER FLAG OUT)
One standard super flag load shall be 56 ohms connected between G/S SUPER FLAG OUT J6-38
and GND J6-41.
ARINC 429 Transmitter Load (VLOC 429 OUTA/OUTB)
The standard ARINC 429 transmitter load shall be 2.4K ohms resistance and 250 pF capacitance
between the differential outputs VLOC 429 OUTA J6-24 and VLOC 429 OUTB J6-23, and 2.4K
ohms resistance and 250 pF capacitance connected from each of the outputs to ground.
RS232 Transmitter Load (VLOC SERIAL OUT)
The standard RS232 transmitter load shall be 3000 ohms measured from the RS232 serial output
to ground. One standard load shall be connected between VLOC SERIAL OUT J10-10 and GND
J10-3.
NAV Audio Output Load (NAV AUDIO HI to NAV AUDIO LO)
The standard audio output load shall be 500 ohms, connected between NAV AUDIO HI J6-16
and NAV AUDIO LO J6-17.
5.4.4
VOR Standard Signals
All RF input levels for the NAV receiver requirements are specified in dBm and do not require a
6 dB attenuator on the output of the signal generator provided the signal generator is calibrated
into 50 ohms.
5.4.4.1 Standard Test Signals
Unless otherwise specified, the RF input signals shall be at a level of -53 dBm and have a
frequency within 0.001% of the assigned carrier frequency in addition to the characteristics
outlined below.
Standard VOR Test Signal
Standard VOR test signal is composed of two components:
a) a RF carrier, amplitude modulated 30% with a 9960 Hz signal that is frequency modulated at
30 Hz with a deviation ratio of 16 (frequency deviation of +/-480 Hz) for Reference phase
(REF), and
b) a variable phase (VAR) 30 Hz signal amplitude modulated 30% with respect to the reference
phase signal (REF). The RF input signal shall be at a level of -53 dBm and have a frequency
within 0.001% of the assigned carrier frequency.
Page 5-6
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Standard VOR Audio Test Signal
Standard VOR audio test signal is a standard VOR test signal to which is added a 1000 Hz signal,
amplitude modulating the carrier 30%.
Standard Audio Test Signal
Standard audio test signal is a RF carrier amplitude modulated 30% at 1000 Hz. The RF input
signal shall be at a level of -53 dBm and have a frequency within 0.001% of the assigned carrier
frequency.
Standard VOR Deviation Signal
Standard VOR deviation signal is a standard VOR test signal in which the difference in phase
between the reference and variable phase signal is 10 (+/-0.3) degrees from the setting of the
equipment course selector. (This produces a NAV +LEFT output voltage of 150 millivolts
+/- 4.5 millivolts.)
Standard VOR Centering Signal
Standard VOR centering signal is a standard VOR test signal in which the difference in phase
between the reference and variable phase signal is equal (+/-0.3 degree) from the setting of the
equipment course selector.
5.4.5
Localizer Standard Signals
All RF input levels for the NAV receiver requirements are specified in dBm and do not require a
6 dB attenuator on the output of the signal generator provided the signal generator is calibrated
into 50 ohms.
5.4.5.1 Standard Test Signals
Unless otherwise specified, the RF input signals shall be at a level of -53 dBm and have a
frequency within 0.001% of the assigned carrier frequency in addition to the characteristics
outlined below. Note: ddm is the difference in depth of modulation. The absolute difference in
percentage of modulation of two tones divided by 100.
Standard Localizer Test Signal
Standard localizer test signal is an RF carrier amplitude modulated simultaneously by 90 and 150
Hz tones so that the sum of their separate modulation levels is 40% r1%. The tones shall have
the following characteristics:
a) they shall be phase-locked in such a manner that their voltage waveforms simultaneously pass
through zero in the same direction.
b) the maximum simultaneous variation in frequency shall not exceed +/-0.3%.
c) the total harmonic content of each tone shall not exceed 3%.
d) the RF level shall be -53 dBm and have a frequency within 0.001% of the assigned carrier
frequency unless otherwise specified.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-7
Rev. C
Standard Localizer Centering Test Signal
Standard localizer centering test signal is a standard localizer test signal in which the difference in
depth of modulation of the 90 and 150 Hz signals is less than 0.001.
Standard Localizer Deviation Test Signal
Standard localizer deviation test signal is a standard localizer test signal in which the difference in
depth of modulation (ddm) of the 90 and 150 Hz signals is 0.093 +/-0.002.
A NAV +LEFT output voltage of 90 millivolts results.
Standard Localizer Audio Test Signal
Standard localizer audio test signal is a standard localizer test signal to which is added a
1020 Hz signal amplitude modulating the carrier 30%.
Standard Audio Test Signal
Standard audio test signal is an RF carrier amplitude modulated 30% at 1020 Hz.
Page 5-8
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.5
ALIGNMENT
Board alignment is not recommended on any of the 400 Series units. Alignment is performed on
individual boards at the factory before being shipped as replacement items.
5.6
CALIBRATION
Calibration can be performed for the following:
COM Frequency
Frequency Spacing
SQ 250 – (the 25 kHz noise squelch)
SQ 833 – (the 8.33 kHz carrier squelch)
Sidetone Audio Output Level
MIC Gain
The unit must be placed in the configuration mode and the Com
Setup Page must be accessed in order to perform calibration
(Figure 5-2). Figure 5-2 shows the MIC field which is for –05
com boards and 105-00611-00 (16 watt) com boards only. For
earlier versions of the board, the mic gain is adjusted via
potentiometer R558 (Figure 5-3).
Figure 5-2. Com Setup Page
Follow these steps to put the unit in configuration mode:
1. With power applied to the aviation rack and the 400 Series unit turned off, press and hold the
ENT key and turn the unit on. Release the ENT key when the display activates.
After the database pages, the first page displayed is the MAIN ARINC 429 CONFIG
page. While in configuration mode, pages can be selected by ensuring the cursor is off
and rotating the small right knob.
2. To change data on the displayed configuration page, press the small right knob (CRSR) to
turn on the cursor. Turn the large right knob to switch between data fields.
3. Turn the large or small right knob to change a field that the cursor is on. Once you have made
the desired selection, press the ENT key to accept the entry.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-9
Rev. C
5.6.1
Com Setup Page Fields
5.6.1.1
Com Frequency
The Com Frequency field selects a VHF communication frequency. For purposes of setting the
squelch, sidetone levels and mic gain, only the frequencies 118.000, 127.000, and 136.975 MHz
can be used.
If any adjustment is made at one of these frequencies, it should
be made at all three frequencies.
5.6.1.2
Frequency Spacing
8.33 kHz channels are not authorized for use in the United States.
SELECTION
DESCRIPTION
25.0 kHz
Selects traditional 25 kHz spacing (760 channel)
8.33 kHz
Selects 8.33 kHz channel spacing, which is required in certain areas of the world
5.6.1.3
SQ 250
For GNS 430 units with serial number 96300200 or lower, the operation
of the SQ 250 setting is reversed. The higher the SQ 250 number, the
more signal is required to break squelch. For units with serial number
lower than 96300200, units may contain –03 Com Boards. See Section 1
for 28V unit part numbers.
The SQ 250 field sets the noise squelch threshold for 25 kHz channel spacing operation. The
squelch threshold can be set to any value between zero and 63.
25 kHz ___________ OK
5.6.1.4
SQ 833
The SQ 833 field sets the squelch threshold for 8.33 kHz channel spacing operation. The squelch
threshold can be set to any value between zero and 63. The higher the number, the more signal is
required to break squelch.
8.33 kHz ___________ OK
Page 5-10
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.6.1.5
Sidetone
The sidetone audio output level is independent of the COM volume knob on the unit.
The SIDETN field sets the sidetone audio output level. The sidetone can be set to any value
between zero and 63. The higher the number, the greater the sidetone volume.
SIDETN ___________ OK
5.6.1.6
MIC Gain
The MIC field sets the MIC audio gain. The MIC gain can be set to any value between 00 and
63. The higher the number, the greater the gain in the mic audio circuit.
MIC Gain ___________ OK
Figure 5-3. R558 (Com Board)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-11
Rev. C
5.7
TEST PROCEDURES
5.7.1
Test Mode
In order to perform certain tests in the following section, the GNS 430 must be put into test mode,
which allows access to the Test Pages (Figure 5-4). To put the unit in the test mode, ground Test
Pin (J1-76) and turn the unit on. When in test mode, specific test pages can be selected by
ensuring the cursor is off and turning the small right knob.
Do not make changes on the test pages other than those required
to perform the tests listed in this manual.
Follow these steps to change data on a Test Page:
1. Press the small right knob (labeled CRSR) to turn the cursor on.
2. Turn the large right knob to change data between data fields.
3. Turn the large or small right knob to change a field that the cursor is on.
4. Once you have made the desired selection, press the ENT key to accept the entry.
Page 5-12
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 5-4. Test Pages
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-13
Rev. C
5.7.2
Com Testing
Before starting com testing, note the following:
1. Disable the audio compressor unless otherwise specified. The compressor
can be disabled for testing purposes by manually grounding the
SQUELCH/COMPRESSOR TEST input at Pin 3 of J2.
2. The 8.33 kHz channel mode uses a channel ID that does not match the actual operating
frequency. Channel ID is used to specify test frequency. Unless otherwise specified, set
the receive channel to 127.000 MHz. Table 5-1 shows the channel ID and frequency for
the standard receiver test channels.
3. Unless otherwise specified, set the receive channel to 127.000 MHz for 25 kHz channel
mode, and 127.005 MHz for 8.33 kHz channel mode. Where no channel mode is
specified, perform the test at 127.000 MHz, 25 kHz channel mode.
Table 5-1. Channel ID and Frequency
25 kHz Channel
8.33 kHz Channel
Channel
Frequency
118.025 MHz
118.030 MHz
118.025 MHz
127.000 MHz
127.005 MHz
127.000 MHz
136.975 MHz
136.980 MHz
136.975 MHz
5.7.2.1 Power Input Check
Before starting com testing, verify the following com board power requirements. If excessive
current readings are noted, stop testing and replace the Com Board.
1. Receive Mode (J2-11 and 12):
Voltage _________ (+ 27.5 V)
Tolerance _________ (r0.4 V)
Max Current _________ (15 mA)
2. Transmit Mode: +28 Volt Radios (J2-11 and 12):
Voltage _________ (+ 27.5 V)
Tolerance _________ (r0.4 V)
Max Current_________ (3.0 A)
Page 5-14
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400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
3. Transmit Mode: +14/+28 Volt Radios (J2-11 and 12):
Voltage _________ (+ 13.75 V)
Tolerance _________ (r0.2 V)
Max Current Avg1_________ (6.0 A)
5.7.2.2
RF Power Out
1. Set input voltage to 27.5 VDC (10 W, 28V units only) in TX mode at Pins J2-11 and 12.
2. Connect a wattmeter to the antenna output and record the following unmodulated values:
118.50 MHz _________ 10 Watts Min (-0 dB)
127.50 MHz _________ 10 Watts Min (-0 dB)
136.50 MHz _________ 10 Watts Min (-0 dB)
3. Set input voltage to 13.75 VDC (10 W, 14/28V units only) in TX mode at Pins J2-11 and 12.
4. Connect a wattmeter to the antenna output and record the following unmodulated values:
118.50 MHz _________ 10 Watts Min (-0 dB)
127.50 MHz _________ 10 Watts Min (-0 dB)
136.50 MHz _________ 10 Watts Min (-0 dB)
5. Set input voltage to 27.5 VDC (16 W units) in TX mode at Pins J2-11 and 12.
6. Connect a wattmeter to the antenna output and record the following unmodulated values:
118.50 MHz _________ 16 Watts Min (-0 dB)
127.50 MHz _________ 16 Watts Min (-0 dB)
136.50 MHz _________ 16 Watts Min (-0 dB)
7. Verify that there is no more than 3 watts variation among the three values in steps 2, 4, and 6.
______OK
1
TX adjusted for a 10 watt carrier 80% AM, 1 KHz (both 10 and 16 watt versions).
400 SERIES MAINTENANCE MANUAL
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Page 5-15
Rev. C
Figure 5-5. Modulation Measurement
Figure 5-5 shows the output of the Narda Crystal Detector displayed on
an oscilloscope. The oscilloscope must be DC coupled in order for the
modulation signal to be displayed correctly.
5.7.2.3
Frequency Stability and Tolerance
Verify the RF carrier is within 0.0005 % (5 PPM).
136.50 MHz _________ Hz (error < 683 Hz)
5.7.2.4
Modulation Capability Test
1. Apply a standard modulated test signal to the MIC audio input.
2. Measure and verify the modulation is not less than 70% and not greater than 90%
(Figure 5-5).
118.50 MHz _________ (70-90%)
127.50 MHz _________ (70-90%)
136.50 MHz _________ (70-90%)
3. To verify the MIC compressor has a minimum dynamic range of 20 dB, input a 2.75 Vrms
MIC signal and verify that the modulation percentage does not change more than 0.5 dB from
0.275 Vrms input.
127.00 MHz _________ change in dB
Page 5-16
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P/N 190-00140-05
5.7.2.5
Carrier Noise Level
1. Apply a standard MIC input signal.
2. The demodulated noise on the transmitter output, without audio modulation, shall be at least
45 dB below the demodulated audio level obtained when the transmitter is modulated with a
standard mic input signal.
118.50 MHz ______ > 45 dB
127.50 MHz ______ > 45 dB
136.50 MHz ______ > 45 dB
5.7.2.6
Demodulated Audio Distortion
1. Apply a standard mic input signal.
2. Verify the combined total of distortion and noise in the demodulated output does not exceed
10% of the total demodulated output at modulation frequencies of 350, 1000, and 2500 Hz.
118.50 MHz ______ < 10%
127.50 MHz ______ < 10%
136.50 MHz ______ < 10%
5.7.2.7
Demodulated Audio Response
1. Adjust the mic input level for 200mV at 1000 Hz. This should produce approximately 70%
TX modulation.
2. Sweep the audio input frequency from 350 to 2500 Hz.
3. Verify the frequency response of the audio output does not vary more than 6 dB.
127.500 MHz (350 Hz) _________ dB
127.500 MHz (1000 Hz) _________ dB
127.500 MHz (2500 Hz) _________ dB
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-17
Rev. C
5.7.2.8
Sidetone
1. Apply a standard mic input signal. Measure com audio out and while transmitting, verify
sidetone level is 1.4 Vrms ƒ0.2 Vrms.
118.50 MHz ______ Vrms
127.50 MHz ______ Vrms
136.50 MHz ______ Vrms
5.7.2.9
MIC Intercom Test
1. Remove RF input from the unit.
2. Squelch the receive audio (enable compressor).
3. Apply a 125 mVrms, 1 kHz audio signal to the intercom mic audio input.
Audio Level ________ > 7.07 Vrms
4. Remove intercom audio input signal.
5.7.2.10 Receiver Sensitivity
1. Disable the compressor.
2. Apply a 2 PV (hard), 30% modulated, 1000 Hz RF signal to the unit and set volume to rated
audio (a 7.07 Vrms).
3. Measure the sensitivity in the 25 kHz channel mode (signal + noise to noise ratio).
118.025 MHz ______ > 6 dB
127.000 MHz ______ > 6 dB
136.975 MHz ______ > 6 dB
4. Measure in the 8.33 kHz channel mode.
118.030 MHz ______ > 6 dB
127.005 MHz ______ > 6 dB
136.980 MHz ______ > 6 dB
Page 5-18
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5.7.2.11
TX Interlock
1. Apply an 10 PV, 30% modulated, 1000 Hz RF signal.
2. Measure SNR at rated audio (a7.07 Vrms).
Sensitivity Reading 1______
3. Enable TX interlock line.
4. Measure SNR again.
Sensitivity Reading 2______
NLT 15dB difference between sensitivity reading 1 and 2
______OK
5. Disable TX interlock line.
5.7.2.12
AGC Test
1. Apply a 30% modulated 1000 Hz RF signal to the unit.
2. Tune the unit to 127.000 MHz. Vary the signal from 5 PV to 450mV.
3. Set the volume for rated audio (a7.07 Vrms).
4. Verify the audio output does not vary by more than 6 dB.
5 PV to 450mV ________dB
5.7.2.13
Selectivity (25 kHz Mode)
1. Tune the unit to 127.000 MHz.
2. Turn the modulation OFF on the RF signal generator.
3. Turn the power/volume control knob fully counterclockwise, but not past the detent (OFF)
position.
4. Apply a 10 µV RF signal at 127.000 MHz.
5. Monitor the AGC voltage with the DMM (DC) at J2-2.
6. The DC voltage reading on the DMM is the AGC reference voltage, write it down as you will
need it for the rest of the test.
AGC Reference Voltage ______ VDC
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7. Adjust the RF level to 20 µV.
8. Verify the DMM reading is greater than the AGC reference voltage.
DMM reading ________VDC (NLT AGC Reference Voltage)
9. Adjust the signal generator frequency to 127.008 MHz.
10. Verify the DMM reading is greater than the reference AGC voltage.
127.008 MHz ______VDC (NLT AGC Reference Voltage)
126.992 MHz ______VDC (NLT AGC Reference Voltage)
11. Adjust signal level to 10 mV.
127.025 MHz ______VDC (NGT AGC Reference Voltage)
126.975 MHz ______VDC (NGT AGC Reference Voltage)
5.7.2.14
Selectivity (8.33 kHz Mode)
1. Put unit in the 8.33 kHz mode.
2. Tune to 127.000 MHz.
3. Turn the modulation OFF on the RF Signal Generator.
4. Turn the power/volume control knob fully counterclockwise, but not past the detent (OFF)
position.
5. Apply a 10 PV RF signal at 127.000 MHz.
6. Monitor the AGC voltage with the DMM (DC) at J2-2.
7. The DC voltage reading on the DMM is the AGC reference voltage, write it down as you will
need it for the rest of the test.
AGC Reference Voltage ______VDC
8. Adjust the RF level to 20 PV.
9. Verify the DMM reading is greater than the AGC reference voltage.
DMM Reading ______VDC (NLT AGC reference voltage)
10. Adjust the signal generator frequency to 127.002778 MHz.
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11. Verify the DMM reading is greater than the reference AGC voltage.
127.002778 MHz ______VDC (NLT AGC reference voltage)
126.997222 MHz ______VDC (NLT AGC reference voltage)
12. Adjust signal level to 10 mV.
127.00737 MHz ______VDC (NGT AGC reference voltage)
126.99263 MHz ______VDC (NGT AGC reference voltage)
5.7.2.15
Volume Control (Audio Output)
1. Enable compression (see Paragraph 5.7.2).
2. Apply a 100 µV, 118.5 MHz, 1 KHz tone modulated 30% signal to the unit.
3. Select 118.500 MHz.
4. Monitor the audio output.
5. Turn the volume control fully clockwise.
6. Verify a minimum of 7.07 Vrms at 500 ohms.
Audio Output (Measured between J6-16 and 17) ________ NLT 7.07 Vrms
7. Turn the volume control fully counterclockwise (not past the detent OFF position).
8. Verify a maximum of 22 mVrms.
Audio Output (Measured between J6-16 and 17) ________ NGT 22 mVrms
5.7.2.16
Audio Distortion Test
1. Apply a 10 mV, 85% modulated signal.
2. Measure the receiver audio distortion. Set volume for rated audio.
350 Hz ______ < 25%
1000 Hz ______ < 15%
2500 Hz ______ <15%
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Rev. C
5.7.2.17
Audio Frequency Response
1. With compression disabled, apply a 30% modulated, 1 mV signal to the unit.
2. Verify the audio output does not change more than 6 dB from 350 Hz to 2.5 kHz.
3. Verify the audio-frequency response above 2500 Hz decreases, and at all frequencies above
4000 Hz, it is at least 18 dB below the output obtained at 1000 Hz.
4. Measure the audio output in the 25 kHz channel mode.
350 Hz ______ dB
1000 Hz ______ dB
1500 Hz ______ dB
2500 Hz ______ dB
5. Measure the audio output in the 8.33 kHz channel mode.
350 Hz ______ dB
1000 Hz ______ dB
1500 Hz ______ dB
2500 Hz ______ dB
5.7.2.18
Receiver Audio Compressor Test
1. Enable compressor.
2. Apply a 100µV 1 kHz, 20% modulated audio signal.
3. Adjust the power/volume control for 7.07 Vrms com audio output.
4. Set the com audio output reference level to 0 dB.
5. Adjust the modulation depth to 85% and verify the com audio output level does not vary more than
3 dB.
25% to 85% audio variation __________ (dB)
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5.7.2.19
Note:
Squelch Test
Opened squelch—Audio
Closed Squelch—No Audio
1. Enable compressor (see Section 5.7.2).
2. Set the unit and the RF signal generator to 127.000 MHz, 30% modulated with a 1 kHz tone.
3. Turn the RF level down below 1µV.
4. Turn the power/volume control on the radio fully clockwise.
5. SLOWLY increase the RF level until the squelch just breaks open and audio can be heard.
6. Verify the RF signal generator level is between 1 and 4 µV (1.5-6 µV for 8.33 kHz).
7. SLOWLY decrease the RF level until the squelch closes (no audio).
8. Verify the RF level is less than 6 dB below that level which opened the squelch.
9. Test squelch at the channels shown below in the 25 kHz channel mode.
118.025 MHz ______ < 6 dB
127.000 MHz ______ < 6 dB
136.975 MHz ______ < 6 dB
10. Measure in the 8.33 kHz channel mode:
118.030 MHz ______ < 6 dB
127.005 MHz ______ < 6 dB
136.980 MHz ______ < 6 dB
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Rev. C
5.7.2.20
Frequency Modulation
FM deviation is to be measured with an average responding
detector, which is RMS sine wave calibrated. The result is to be
divided by 0.707 to yield the mathematical peak deviation.
1. Modulate the transmitter with a standard modulator input signal.
2. Verify the FM deviation does not exceed r1 kHz.
118.005 MHz ______ kHz
127.500 MHz ______ kHz
136.500 MHz ______ kHz
5.7.2.21
Com Remote Transfer Input
Ground Pin 15 of J2 and verify the status of the XFR box on the Com Setup Test Page changes
accordingly.
_________ OK
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5.7.3
Navigation Receiver Final Tests
5.7.3.1
Voice/Ident Audio Output Level
1. Apply a standard audio test signal having a RF level of -93 dBm.
2. Select maximum audio (volume control turned fully clockwise), and turn off the ident filter.
3. Measure 500 : VOR/ILS AUDIO HI J6-16 with respect to 500 : VOR/ILS AUDIO LO
J6-17.
4. Verify an audio output level into a 500 Ohm load that is not less than 20 Vpp (7.07 Vrms).
Audio Output Level_________ NLT 20 Vpp
5. Select minimum audio (volume control turned fully counter clockwise without turning off).
6. Verify an audio output level into a 500 Ohm load that is not more than 63 mVpp
(22 mVrms).
5.7.3.2
Audio Output Level_________ NGT 63 mVpp
Voice/Ident Audio Frequency Response
1. Turn the ident filter off.
2. With an RF input level of -73 dBm, measure 500 : VOR/ILS AUDIO HI J6-16 with respect
to 500 : VOR/ILS AUDIO LO J6-17 for 350, 1000, and 2500 Hz.
3. Set audio output to a 7.07 Vrms @ 1000 Hz then verify the difference between the maximum
and minimum VOICE/IDENT audio output levels is less than 6 dB, at the three frequencies
listed above.
Max and Min Levels_________ < 6 dB
4. Measure 500 : VOR/ILS AUDIO HI J6-16 with respect to 500 : VOR/ILS AUDIO LO
J6-17 for 150 Hz relative to the peak audio level frequency and for 9000 Hz relative to the
peak audio level frequency.
5. Verify the output is not less than 20 dB relative to 1 kHz audio output.
Output_________ NLT 20 dB
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Rev. C
5.7.3.3
Voice/Ident Audio Distortion
1. Apply an input level from the RF generator of -79 dBm.
2. Modulate a standard VOR audio test signal at 350 Hz, 1000 Hz, and 2500 Hz (must be in
IDENT mode to pass 1000 Hz tone).
3. Measure 500 : VOR/ILS AUDIO HI J6-16 with respect to 500 : VOR/ILS AUDIO LO
J6-17.
4. Verify the combined distortion and noise in the receiver VOICE/IDENT audio output is not
greater than 10% at all levels up to 100 mW (7.07 RMS or 20Vpp).
Distortion_________ NGT 10%
5.7.3.4
VOR AGC
1. Apply a standard VOR audio test signal between the limits of -99 dBm and -13 dBm.
2. Measure 500 : VOR/ILS AUDIO HI J6-16 with respect to 500 : VOR/ILS AUDIO LO
(GND) J6-17 (must be in IDENT mode to pass 1000 Hz tone), set to a7.07 Vrms.
3. Verify the difference between the maximum and the minimum VOICE/IDENT audio output
levels is not greater than 3 dB.
Maximum and Minimum Output Level_________ NGT 3 dB
5.7.3.5
VOR Audio Sensitivity
1. Place unit in IDENT mode.
2. Apply a -103.5 dBm RF level to the RF input.
3. Apply a Standard VOR Audio Test signal at RF frequencies of 108.00 MHz, 112.50 MHz,
112.55, and 117.95 MHz.
4. Measure at the 500 : VOR/ILS AUDIO HI J6-16 and 500 : VOR/ILS AUDIO LO J6-17
outputs, set to a 7.07 Vrms.
5. Verify the Audio SINAD or SNR is greater than 6 dB.
Audio SINAD________> 6 dB
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5.7.3.6
Receiver Quieting
1. Apply a -86 dBm RF level to the RF input.
2. Apply a Standard VOR Audio Test signal at 108.00 MHz.
3. Measure at the 500 : VOR/ILS AUDIO HI J6-16 and 500 : VOR/ILS AUDIO LO J6-17
outputs.
4. Verify the Audio SINAD or SNR is greater than 25 dB.
5.7.3.7
Audio SINAD________> 25 dB
Ident/Voice Tone Ratio
1. Apply a -67 dBm RF level to the RF input.
2. Apply a Standard VOR Audio Test signal with modulation frequency of 1020 Hz at
108.00 MHz.
3. Measure at the 500 : VOR/ILS AUDIO HI J6-16 and 500 : VOR/ILS AUDIO LO J6-17
outputs, set to a7.07 Vrms.
4. Toggle between IDENT mode and VOICE mode and verify the ident/voice ratio is greater
than 20 dB.
Ident/Voice Ratio __________ > 20 dB
5. Apply a Standard Localizer Audio Test signal with modulation frequency of 1020 Hz at
108.10 MHz.
6. Measure at the 500 : VOR/ILS AUDIO HI J6-16 and 500 : VOR/ILS AUDIO LO J6-17
outputs.
7. Toggle between IDENT mode and VOICE mode and verify the ident/voice ratio is greater
than 20 dB.
5.7.3.8
Ident/Voice Ratio________> 20 dB
Harmonic Distortion
1. Apply a -53 dBm signal amplitude modulated 30% at 1 kHz (IDENT Mode Selected).
2. Measure at the 500 : VOR/ILS AUDIO HI J6-16 and 500 : VOR/ILS AUDIO LO J6-17
outputs, and set to 7.07 Vrms.
3. Verify the total harmonic distortion is less than 5%.
THD______< 5%
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Page 5-27
Rev. C
5.7.3.9
VOR Flag Sensitivity
A VOR/LOC +FLAG output voltage of greater than 260 mV
fully conceals the indicator flag (‘HIDE’) and a VOR/LOC
+FLAG output voltage of less than 125 mV fully reveals the
indicator flag (IN VIEW). This test requires a Precision Track
Selector or similar connected to the NAV OBS circuitry.
1. Apply a standard VOR test signal at 108.00 MHz at –103.5 dBm RF signal to the RF input.
2. Measure at the VOR/LOC +FLAG J6-3 and VOR/LOC -FLAG (VOR/LOC COMMON)
J6-4 outputs.
3. Verify the VOR/LOC +FLAG output is not less than 260 mV.
VOR/LOC +FLAG ________NLT 260 mV
5.7.3.10
LOC Flag Sensitivity
1. Apply a Standard Localizer Test Signal at 108.10 MHz at -103.5 dBM.
2. Measure at the VOR/LOC +FLAG J6-3 and VOR/LOC -FLAG (VOR/LOC COMMON)
J6-4 outputs.
3. Verify the VOR/LOC +FLAG output is not less than 260 mV.
VOR/LOC +FLAG Output ______ NLT 260 mV
4. Apply a LOC Standard Deviation Test Signal.
5. Lower the RF level such that it causes the course deviation output (VOR/LOC +LEFT) to be
less than 50% of standard deflection. 50% of standard deflection in LOC mode is 45 mV.
6. Verify the VOR/LOC +FLAG output is less than 125 mV (Flagged).
VOR/LOC +FLAG Output ______ < 125 mV
5.7.3.11
VOR/LOC Composite Test
1. Apply a standard VOR test signal to the RF input of the NAV receiver. Verify the VOR/LOC
COMPOSITE OUT is 0.5 r0.1 Vrms into a 10 k: load.
VOR/LOC COMPOSITE OUT ______ Vrms
2. Apply a standard localizer centering test signal to the RF input of the NAV receiver. Verify
the VOR/LOC COMPOSITE OUT is 0.333 r0.05 Vrms into a 10 k ohm load.
VOR/LOC COMPOSITE OUT ______ Vrms
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5.7.3.12
VOR Course Deviation Sensitivity
1. Apply a standard VOR deviation signal at 108.00 MHz, –103.5 dBm RF level to the RF
input. at a radial of 160 degrees ‘FROM’.
2. Apply a Precision Test Selector or similar device at 150 degrees in course angle.
3. Measure at the VOR/LOC +LEFT J6-5 and VOR/LOC +RIGHT (VOR/LOC COMMON) J66 outputs.
Course Deviation Output______150 mV ±30mV
5.7.3.13
Localizer Course Deviation Sensitivity
1. Apply a standard localizer deviation signal of 108.10 MHz, at a –103.5 dBm RF signal to the
RF input.
2. Measure at the VOR/LOC +LEFT J6-5 and VOR/LOC +RIGHT (VOR/LOC COMMON) J66 outputs.
3. Verify the magnitude of the course deviation output is greater than 50% (45 mV) of the
nominal output (90 mV).
Course Deviation Output ________ (>45 mV)
5.7.3.14
TO-FROM Indicator
1. Apply a VOR standard test signal @ -93dBm.
2. Select RF signal input bearings of -75 degrees, 0 degrees and +75 degrees from the selected
radial and verify that TO/FROM state does not change.
3. Measure at VOR/LOC +TO J6-1 with respect to VOR/LOC +FROM J6-2. When indicating
TO, 225 mV r75 mV should be present. When indicating FROM, -225 mV r75 mV should
be present.
_____OK
5.7.3.15
Centering Accuracy
Apply a standard localizer centering test signal. Verify the centering error measured at VOR/LOC
+LEFT with respect to VOR/LOC +RIGHT (VOR/LOC COMMON) is less than 4.5 mV (5%).
Centering Error______< 4.5 mV
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Page 5-29
Rev. C
5.7.3.16
Course Deviation Accuracy Test
Apply a standard localizer deviation test signal, 90 Hz greater than 150Hz. Verify the deviation
measured at VOR/LOC +LEFT with respect to VOR/LOC +RIGHT (VOR/LOC COMMON) is
90 mV r9 mV.
_____OK
5.7.3.17
VOR OBS Bearing Accuracy
1. Apply a standard VOR test signal and a PTS or similar device at 60, 150, 240, and 330
degrees in course angle.
2. Monitor the bearing information on the unit display while in test mode.
The OBS bearing is consistent to within r2 degrees of the bearing setting. This output
requires an alignment. This alignment can be done on the unit level by using the unit test
page “MAIN CDI/OBS CONFIG”.
On this page, monitor the current measured angle using the “SELECTED COURSE” field
and calibrate the unit using the “Calibrate to 150?” field (do this after the bearing is selected
to 150 degrees). Note that the angle displayed is rounded to one tenth of one degree. Verify
no error more than 2 degrees.
Error______NGT 2q
5.7.3.18
Selectivity
1. Apply a –93 dBm CW RF signal at a frequency of 110.0 MHz.
2. Measure IF AGC voltage and record as reference.
3. Increase the RF level by 6 dB to –87 dbM.
4. Adjust the RF frequency above the channel center frequency until the frequency is found that
produces an IF AGC voltage equal to the reference IF AGC voltage.
5. Record this (below) as the upper 6 dB bandwidth.
6. Find lower 6 dB bandwidth and record below. Increase RF level by 63 dB to –24 dbM.
7. Find upper 69 dbM bandwidth and record below. Find lower 69 dbM bandwidth and record
below.
Upper 6 dB BW______t 110.0165 MHz
Lower 6 dB BW______d 109.9835 MHz
Upper 69 dBm BW______d 110.036 MHz
Lower 69 dBm BW______t 109.964 MHz
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5.7.3.19
Spurious Response—VOR/LOC
1. Tune the VOR receiver to 117.95 MHz.
2. Verify the input signal level of an undesired image frequency of 77.15 MHz required to
produce a detector-carrier (AGC) level obtained at the VOR/LOC IF AGC J6-7 output with a
-93 dBm Standard VOR Audio Test Signal is not less than -13 dBm.
Input Signal Level______NLT -13 dBm
3. Repeat the test at a LOC frequency of 111.95 MHz and an undesired image frequency of
71.15 MHz.
_____OK
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Page 5-31
Rev. C
5.7.4
Navigation Assembly I/O Tests
5.7.4.1
Localizer Course Deviation Test
1. Display the VOR/LOC/GS CDI Test Page (Figure 5-6).
Figure 5-6. VOR/LOC/GS CDI Test Page
2. Display the following on the VOR/LOC/GS CDI Test Page and verify the following voltages,
measuring across VOR/LOC +LEFT (J6-3) with respect to VOR/LOC +RIGHT (J6-4).
Full Right ___________ (-150 ±15 mV)
Standard Right ___________ (-90 ±9 mV)
Centered ___________ (0 ±4.5 mV)
Standard Left ___________ (+90 ±9 mV)
Full Left________ (+150 ±15 mV)
5.7.4.2
To/From Deflection Output Characteristic Test
Verify the TO/FROM (VOR/LOC +TO) output is capable of driving up to three meter loads of
200 ohms each.
5.7.4.3
To/From Deflection Accuracy Test
1. Display TO.
2. Measure VOR/LOC +TO J6-1 with respect to VOR/LOC +FROM J6-2.
3. Verify the following output:
TO/FROM (VOR/LOC +TO) ______ (225 r 75 mV)
4. Display FROM.
5. Measure VOR/LOC +TO J6-1 with respect to VOR/LOC +FROM J6-2.
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6. Verify the following output:
TO/FROM (VOR/LOC +TO) ______(-225 r 75 mV)
7. Display HIDE.
8. Measure VOR/LOC +TO (J6-1) with respect to VOR/LOC +FROM (J6-2).
9. Verify the following output:
5.7.4.4
TO/FROM (VOR/LOC +TO) ______ mV (0 mV r5 mV)
Course Deviation Flag Output Characteristic Test
Verify the Course Deviation Flag (VOR/LOC +FLAG) output is capable of driving up to three
meter loads of 1000 ohms each.
5.7.4.5
Course Deviation Flag Test
1. Display Flag ‘HIDE’.
2. Measure VOR/LOC +FLAG (J6-3) with respect to VOR/LOC -FLAG (J6-4).
3. Verify the following output:
(VOR/LOC +FLAG) ______ (375 r80 mV)
4. Display Flag ‘IN VIEW’.
5. Measure VOR/LOC +FLAG (J6-3) with respect to VOR/LOC -FLAG (J6-4).
6. Verify the following output:
5.7.4.6
(VOR/LOC +FLAG) ______ mV (0 mV ±25 mV)
VOR/LOC Super Flag Output Test
1. Select flag ‘HIDDEN’. Measure VOR/LOC SUPER FLAG OUT (J6-15) with respect to
GND (J6-41).
2. Verify the VOR/LOC SUPER FLAG OUT supplies not less than 500 mA.
3. Verify the output voltage is not less than PWR_IN minus 1.5 volts.
VOR/LOC SUPER FLAG OUT ______ (NLT PWR_IN minus 1.5 volts)
4. Select flag ‘IN VIEW’. Measure VOR/LOC SUPER FLAG OUT (J6-15) with respect to
GND (J6-41).
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5. Verify the VOR/LOC SUPER FLAG OUT output voltage with respect to ground is 0 r250
mV (50 ohm load).
VOR/LOC SUPER FLAG OUT ______ mV
5.7.4.7 NAV Input Lines
Monitor the “VOR DISCRETE INPUTS” Test Page and verify that toggling the below listed
inputs between their active and inactive states, causes the appropriate status box to change states.
Remote Transfer
_______ OK
DME Common
_______ OK
DME Request
_______ OK
DME RNAV
_______ OK
5.7.4.8
NAV OBI Outputs
Monitor the “VOR DISCRETE OUTPUTS” Test Page and verify that toggling the below listed
outputs between their active and inactive states causes the output voltage on the appropriate line
to switch between low (<1.0 V) and high (>4.0 V) states.
OBI Clock
Low______ High ______
OBI Data
Low ______ High ______
OBI Sync
Low ______ High ______
ILS APR
Low (Active) _____ High (Inactive) ____
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5.7.4.9 NAV Serial DME Outputs
Monitor the “VOR DISCRETE OUTPUTS” Test Page and verify that toggling the below listed
outputs between their active and inactive states causes the output voltage on the appropriate line
to switch between low (<.01 V) and high (>8.0 V) states.
Serial DME Clock
Low____ High ____
Serial DME Data
Low____ High ____
5.7.4.10 NAV Parallel DME Outputs
Monitor the “VOR DISCRETE OUTPUTS” Test Page and verify that toggling the below listed
outputs between their active and inactive states causes the output voltage on the appropriate line
to switch between low (<1.0 V) and high (>4.0 V) states. NOTE: The far right digit on the test
page represents the 50 kHz output, the next digit to the left represents the 100 kHz output and so
on, the far left digit has no corresponding output.
PAR DME 50 kHz
Low____ High ____
PAR DME 100 kHz
Low____ High ____
PAR DME 200 kHz
Low____ High ____
PAR DME 400 kHz
Low____ High ____
PAR DME 800 kHz
Low____ High ____
PAR DME 1 MHz
Low____ High ____
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Rev. C
PAR DME 2 MHz
Low____ High ____ (Input Switch must not be grounded for this test)
PAR DME 4 MHz
Low____ High ____ (Input Switch must not be grounded for this test)
PAR DME 8 MHz
Low____ High ____
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5.7.5
Glideslope Final Tests
5.7.5.1
Glideslope Course Deviation Output Characteristic Test
1. Apply a standard course deviation input signal to the unit.
2. Measure GLIDESLOPE +UP (J6-32) with respect to GLIDESLOPE +DOWN (J6-31).
3. Verify the deviation output voltages (GLIDESLOPE +UP) for the following conditions.
Full Scale Deflection (0.175 ddM input signal):
________ mV (150 ±15 mV)
Greater than Full Scale Deflection (0.4 ddM input signal):
________ mV (300 ±30 mV)
5.7.5.2
Course Deviation Deflection Accuracy Test
1. With a standard deflection ‘FLY DOWN’ condition (90 Hz dominant), verify the output is
-78 ±7.8 mV.
‘FLY DOWN’______ mV
2. With a standard deflection ‘FLY UP’ condition (150 Hz dominant), verify the output is
+78 ±7.8 mV.
5.7.5.3
‘FLY UP’______ mV
Course Deviation Flag Test
1. Select Flag ‘HIDDEN’.
2. Verify the course deviation flag output is 375 ± 80 mV.
Course Deviation Flag ______ mV
3. Select Flag ‘IN VIEW’.
4. Verify the course deviation flag output is 0 mV ±25 mV.
Course Deviation Flag ______ mV
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Page 5-37
Rev. C
5.7.5.4
Glideslope Superflag Output Test
1. Select flag ‘HIDDEN’.
2. Verify GLIDESLOPE superflag output voltage is not less than PWR_IN minus 1.5 V.
GLIDESLOPE Superflag Output ______ (NLT Power_IN minus 1.5 V)
3. Select Flag ‘IN VIEW’.
4. Verify GLIDESLOPE superflag output is 0 r250 mV.
GLIDESLOPE Superflag Output ______mV
5.7.5.5
Receiver Sensitivity
The Glideslope receiver sensitivity is defined as the minimum
RF input level of a Standard Glideslope Deflection test signal,
which results in a maximum deviation of 60% of standard
deflection (78 mV x 60% = 46.8 mV).
1. Apply a glideslope standard deviation test signal to the unit.
2. Measure GLIDESLOPE +UP (J6-32) with respect to GLIDESLOPE +DOWN
(GLIDESLOPE Common) (J6-31).
3. Measure at the following GLIDESLOPE (LOC) frequencies and verify the sensitivity is
better than –92 dBm.
329.15 MHz (108.95 MHz) _________>(-92 dBm)
332.00 MHz (109.30 MHz) _________> (-92 dBm)
335.00 MHz (110.30 MHz) _________> (-92 dBm)
4. Verify the receiver sensitivity variation is not greater than 3 dB at the three frequencies in
step 3.
Receiver Sensitivity Variation ________NGT 3 dB
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5.7.5.6
Centering Accuracy
1. Apply a standard glideslope test signal to the unit.
2. Measure GLIDESLOPE +UP (J6-32) with respect to GLIDESLOPE +DOWN
(GLIDESLOPE Common) (J6-31).
3. Verify the centering accuracy is 0 mV r7.8 mV.
5.7.5.7
Centering Accuracy _________mV
AGC
1. Apply a glideslope centering test signal to the unit.
2. Measure GLIDESLOPE +UP (J6-32) with respect to GLIDESLOPE +DOWN
(GLIDESLOPE Common) J6-31 to find the course deviation.
3. Vary the RF input level between -76 dBm and -33 dBm.
4. Verify the course deviation is 0 r7.8 mV
Course Deviation _________mV
5. Apply a glideslope deviation test signal to the unit.
6. Measure GLIDESLOPE +UP with respect to GLIDESLOPE +DOWN (GLIDESLOPE
Common) J6-31 to find the course deviation.
7. Vary the RF level between -76 dBm and -33 dBm.
8. Verify the course deviation is 78 r7.8 mV.
5.7.5.8
Course Deviation ______mV
Selectivity (Bandwidth)
1. Apply the glideslope centering test signal at a level of -87 dBm.
2. Vary the RF frequency r17 kHz from the assigned channel.
3. Measure GLIDESLOPE +UP with respect to GLIDESLOPE +DOWN (GLIDESLOPE
Common) J6-31 to find the course deviation.
4. Verify the course deviation is 0 mV r7.8 mV.
Course Deviation ______mV @ +17 KHz
Course Deviation ______mV @ -17 KHz
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-39
Rev. C
5.7.5.9
Nose Bandwidth
1. Apply standard glideslope test signal to the unit (-56dBm).
2. Find the AGC voltage and use it as a reference.
3. Vary the input signal frequency over the range of r17 kHz from the assigned channel
frequency.
4. Verify the input signal level needed to maintain the AGC reference voltage level does not
vary more than 6 dB.
Input Signal Level Variance______ <6 dB @ +17 KHz
Input Signal Level Variance______ <6 dB @ -17 KHz
5.7.5.10
Skirt Bandwidth
1. Apply standard glideslope test signal to unit at a signal amplitude of –93dBm.
2. Find AGC voltage and use as a reference.
3. Increase signal level to –33 dBm.
4. Vary selected frequency r132 kHz.
5. Verify the AGC voltage is less than the reference AGC voltage from step 2.
AGC Reference Voltage______ dB @ +132 KHz
AGC Skirt Voltage______ dB @ -132 KHz
5.7.5.11
Spurious Response
1. Tune the Glideslope receiver to 335 MHz.
2. Apply a 335 MHz signal at a –87dBm level.
3. Measure the AGC Voltage and use it as a reference.
4. Remove the test signal.
5. Apply an undesired image frequency test signal of 245 MHz with a 150 Hz signal, amplitude
modulated at 30%.
6. Verify the RF level of the undesired image frequency test signal of 245 MHz shall be greater
than –27 dBm to produce an AGC level equal to that of a desired frequency having a level of
–87 dBm.
AGC Reference Voltage___________should be greater than -27 dBm image AGC
voltage
Page 5-40
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.7.5.12
Status Tests
1. The following status bits shall be good with or without a standard glideslope test signal:
GLIDESLOPE ROM_______OK
GLIDESLOPE EEPROM _____OK
GLIDESLOPE Synthesizer Lock__________OK
2. The following status bits shall be good when a standard glideslope test signal is applied to the
RF input of the glideslope receiver:
GLIDESLOPE Super Flag __________OK (this can be viewed on the VOR/LOC/GS CDI
test page. But the test page must be changed to a different test page then back again to
update the flag status).
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-41
Rev. C
5.7.6
Main Board Final Tests
GNC 420 versions 011-00506-10 or 011-00506-30, and GNS
430 versions 011-00280-10 or 011-00280-30 must be verified
operational with dual power switch in both positions (1 and 2).
The “A” versions of the GNC 420 and the GNS 430 must be
verified also. See the tables listed on page 1-2 for part numbers.
5.7.6.1
Push Button Response
Turn the unit on in normal mode and push each button to verify appropriate unit response.
_____OK
5.7.6.2
Rotary Knobs
Turn each rotary knob at least three turns in the same direction and verify appropriate unit
response.
_____OK
5.7.6.3
Map I.D. and Data Card Test
Apply power to the unit and verify the successful display of the following base map data:
Base Map data disclaimer _____OK
Base Map data profile (e.g., Americas, World) _____OK
Base Map version _____OK
Copyright information (date and company) _____OK
Data Card profile _____OK
Cycle version _____OK
Copyright information (date and company) _____OK
Page 5-42
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.7.6.4
Photocell
1. Turn the unit on in the test mode and verify brightness control is in photo mode, using the
main lighting page.
2. With photocell uncovered, ensure display and keyboard backlight LED brightness is proper
under normal conditions.
_____OK
3. Cover the photocell and verify display and keyboard backlight LED brightness decreases.
_____OK
5.7.6.5
Lighting Bus Input
If a lighting bus (any option other than PHOTO) is selected, and
the lighting bus control is turned to its minimum (daytime)
setting, the display brightness will default to tracking the unit’s
photocell.
The unit shall read a DC voltage from 0 to 20 volts with an accuracy of 5% or 0.5 volts
(whichever is greater) and a differential voltage of 5 Vrms at 400 Hz with and an accuracy of 5%
or 0.5 volts (whichever is greater).
For:
LIGHTING BUS HI (J1-39).
LIGHTING BUS LO (J1-40).
A. Lighting Bus AC
1. Using the Main Lighting Test Page, change the source to 5VAC in the display and key fields.
2. Input a square wave, 500 Hz, zero to +5 volt signal to pin J1-39 and J1-40.
A 500 Hz, +5 volt to –5 volt square wave from the IFR 2030 LF output can be used for
this test.
Use the Main Analog Inputs Test Page to monitor the test results.
3. Verify measured value is 5.00 volts r 0.25 VDC. To convert the display value to volts:
V = value x 0.03226.
Measured Value________ VDC
4. Vary the input signal amplitude, and verify the display lighting changes accordingly.
5. Cover the photocell and vary the input signal amplitude, verify the key lighting changes
accordingly.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-43
Rev. C
Figure 5-7. Main Lighting and Main Analog Test Pages
B.
Lighting Bus DC
1. Using the Main Lighting Test Page, change source to 14 VDC in both the DISPLAY and
KEY fields.
2. Attach 12.0 VDC to unit pin J1-39. Ensure the power supply ground is connected to unit
ground (J1-77, 78).
3. Monitor the Test(s) results using the Main Analog Inputs Test Page
4. To convert the displayed value to volts: V = value x 0.09299.
Measured Value______ VDC
5. Verify measured value is 12.0 r5% VDC.
6. Vary the input amplitude (+14 V max), and verify the display lighting changes accordingly.
7. Cover the photocell and verify the input amplitude (+14 V max), verify the key lighting
changes accordingly.
5.7.6.6
Memory Battery Voltage
1. Verify memory battery voltage is OK.
To convert the displayed value to volts: V = value x 0.02. The
unit typically alarms at 2.46 V.
2. The battery voltage for a new battery should be > 2.9 V.
3. Verify V > 2.68 volts.
_____OK
Page 5-44
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.7.6.7
Display Pattern Test
Starting from the display pattern test page, use the “RNG” buttons to cycle through all of the
display patterns to verify all pixels are driven and color contrast is acceptable.
_____OK
5.7.6.8
Fan Test
1. Verify fan blade is not moving or air is not being circulated when unit is off.
_____OK
2. Verify fan blade is moving and air is being blown out (not sucked in) by the fan when unit is
on.
_____OK
5.7.6.9 Unit Configuration Test
Apply power to the unit and verify the successful display of the unit configuration (GPS 400,
GNC 420, or GNS 430).
_____OK
5.7.6.10 GPS Antenna Bias
1. Measure the DC voltage at the GPS antenna connector.
2. Verify voltage is 4.9 to 5.3 volts (with no load).
Voltage________(4.9 to 5.3 V)
5.7.6.11
GPS Noise
Tests 5.7.6.10 and 5.7.6.11 use the GPS Test Page (Figure 5-8).
Figure 5-8. GPS Test Page
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-45
Rev. C
1. Put the unit into Test Mode.
2. Turn the small right knob (CRSR) until you see the GPS Test Page (Figure 5-7).
3. Terminate GPS receiver into a 50 ohm load.
4. The “sgnl” number represents the receiver noise level. Verify this number is within the range
of 1450 to 1750.
_____OK
5.7.6.12
Satellite Tracking Test
The Satellite Tracking Test ensures that the unit has current almanac information and is able to
lock onto a sufficient number of satellites to provide a position. This test also verifies that the
signal strength of the satellites received is at an acceptable level.
1. Turn unit off.
2. Connect the unit to a GA56 antenna mounted outside with a clear view of the sky, through a
coax with a 10 dB r1 dB cable loss @ 1.5 GHz. Note: attenuation pads must not be used
since the unit supplies the GA56 with DC power.
3. Turn on the unit in Normal Mode. Go to the Satellite Data Page, (see Pilot's Guide for
instructions).
4. Allow the unit to lock on to the satellites. If the unit has current almanac data, it will list the
visible satellites on the row labeled SAT and it will begin acquiring satellites in a period of a
few minutes. If the unit indicates SEARCH SKY instead of ACQUIRING, it must search the
sky for available satellites and collect almanac data. A "search the sky" operation may take
20-30 minutes to complete.
5. Unit must then enter 3D navigation mode.
6. Verify a 1.0 r0.001 mSec pulse high every second is present on the time mark out line.
The unit must display the following:
1. Four satellites with signal strength 3 or greater.
2. The average signal strength on satellites above 20 degree elevation shall be greater than or
equal to 3.5 (see Pilot's Guide for instructions). Satellites that are acquiring should not be
included in the average signal strength calculation.
Use the Main CDI/OBS Config Test Page (Figure 5-9) to select
correct test parameters for tests 5.7.6.12 through 5.7.6.19.
Page 5-46
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 5-9. Main CDI/OBS Configuration Test Page
5.7.6.13
MAIN Lateral LEFT, RIGHT Outputs
Measure J1-21 (output) relative to J1-22 (output) [Load—333 ohms (three 1000 ohm loads)
across J1-21 and J1-22]. Note that full left/right (r150 mV) are also available selections but are
not tested.
MAX LEFT ______ (+300 r15 mV)
CENTER ______ (0 r4.5 mV)
MAX RIGHT ______ (-300 r15 mV)
5.7.6.14
MAIN Vertical UP, DOWN Outputs
1. Measure J1-27 (output) relative to J1-28 (output) [Load—333 ohms (three 1000 ohm loads)
across J1-27 and J1-28].
2. Note that full up/down (r150 mV) are also available selections but are not tested.
MAX UP ______ (+300 r30 mV)
CENTER ______ (0 r4.5 mV)
MAX DOWN ______ (-300 r30 mV)
5.7.6.15
MAIN To/From Output
Measure J1-25 relative to J1-26. Load—67 ohms (Three 200 ohm loads) across J1-25 and J1-26.
TO ______ (+190 r40 mV)
HIDDEN ______ (0 r5 mV)
FROM ______ (-190 r40 mV)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-47
Rev. C
5.7.6.16
MAIN Lateral Flag Output
Measure J1-23 relative to J1-24. Load—333 ohms (Three 1000 ohm loads) across J1-23 and
J1-24.
‘HIDE’______ (+375 r80 mV)
IN VIEW ______ (0 r25 mV )
5.7.6.17
MAIN Vertical Flag Output
Measure J1-29 relative to J1-30. Load—333 ohms (Three 1000 ohm loads) across J1-29 and
J1-30.
‘HIDE’______ (+375 r 80 mV)
IN VIEW ______ (0 r25 mV )
5.7.6.18
MAIN Lateral Super Flag Output
1. Measure at J1-17. Load resistor to ground such that it will sink 500 mA when attached to
AIRCRAFT POWER. (J1-19 or 20). Note applicable output will source this current when
active. Note if the load is sized for 13.8 V (28 ohms/7W) operation then this test should not
be run at 27.5 V (56 ohms/14 W).
‘HIDE’______ (AIRCRAFT POWER minus 1.5 VDC min)
IN VIEW ______ (0.25 VDC max )
5.7.6.19
MAIN Vertical Super Flag Output
1. Measure at J1-18. Load—Resistor to ground such that it will sink 500 mA when attached to
AIRCRAFT POWER. (J1-19 or 20). Note: applicable output will source this current when
active. Note if the load is sized for 13.8 V (28 ohms/7W) operation then this test should not
be run at 27.5 V (56 ohms/14W).
‘HIDE’______ (AIRCRAFT POWER minus 1.5 VDC min)
IN VIEW ______ (0.25 VDC max)
Page 5-48
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.7.6.20
Annunciate Outputs
Both the OBS and the AUTO outputs are switched by toggling
the OBS selection on the Test Page.
For:
ANNUCIATOR
PIN
NAV (VLOC)
(J1-1)
GPS
(J1-2)
WAYPOINT
(J1-3)
TERMINAL (A)
(J1-4)
APPROACH (B)
(J1-5)
MESSAGE
(J1-6)
OBS
(J1-7)
AUTO
(J1-8)
INTEGRITY (C)
(J1-9)
D
(J1-10)
E
(J1-11)
ALTITUDE ALARM
(J1-12)
F
(J1-13)
ILS/GPS APPROACH (G)
(J1-14)
TIME MARK
(J1-16)
1. Select the Main Discrete Outputs Test Page (Figure 5-10) for the Annunciate Outputs test.
Figure 5-10. Main Discrete Outputs Test Page
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-49
Rev. C
2. Measure at applicable pin. Load—Resistor to external voltage source such that it will source
275 mA when grounded. Note: applicable output will sink this current when active
(18 ohms/2W when pulled up to 5V).
ACTIVE______ (0.3 VDC max)
INACTIVE ______ (NLT pull-up voltage at minus 0.2V )
5.7.6.21
OBI Serial Interface
For:
SIGNAL NAME
PIN
GPS OBI CLOCK
(J1-43)
GPS OBI DATA
(J1-44)
GPS OBI SYNC
(J1-45)
1. Use the Main Discrete Outputs Test Page to monitor the following test (Figure 5-10).
2. Measure at applicable pin. Load: Resistor to external voltage source such that it will source
25 mA when grounded. Note applicable output will sink this current when active.
LOW______ < 1 V
HIGH______ Load source voltage minus 0.2 V
Page 5-50
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.7.6.22 Discrete Switch and Altitude Inputs
For:
INPUT NAME
PIN
ALTITUDE C4
(J1-61)
ALTITUDE C2
(J1-62)
ALTITUDE C1
(J1-63)
ALTITUDE B4
(J1-64)
ALTITUDE B2
(J1-65)
ALTITUDE B1
(J1-66)
ALTITUDE A4
(J1-67)
ALTITUDE A2
(J1-68)
ALTITUDE A1
(J1-69)
ALTITUDE D4
(J1-70)
OBS MODE SELECT
(J1-71)
CDI SOURCE SELECT
(J1-73)
DEMO MODE SELECT
(J1-75)
TEST MODE SELECT
(J1-76)
1. Apply alternating loads/levels to inputs.
2. Monitor the test results via the Main Discrete Inputs Test Page (Figure 5-11).
3. Verify switching between ACTIVE and INACTIVE loads (listed below) toggles the
corresponding indicator box for each of the input lines listed above.
Figure 5-11. Main Discrete Inputs Test Page
LOAD < 375 ohms to ground = ACTIVE ________OK
LOAD > 100 K ohms to ground = INACTIVE _______OK
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-51
Rev. C
5.7.6.23
ARINC 429 Transmitter and Receivers
Unit outputs both HIGH and LOW speed signals at the same
time in test mode while on the Main Status/Loopback Test Page,
thus both speeds are tested simultaneously.
For:
GPS ARINC 429 OUT A
GPS ARINC 429 OUT B
GPS ARINC 429 IN 1A
GPS ARINC 429 IN 1B
GPS ARINC 429 IN 2A
GPS ARINC 429 IN 2B
A.
(J1-46).
(J1-47).
(J1-48).
(J1-49).
(J1-50).
(J1-51).
429 RX 1 LOWSPEED and HIGHSPEED
429 RX 2 LOWSPEED and HIGHSPEED
1. Test both 429 receivers and 429 transmitter.
2. Connect 429 transmitter A and B to both 429 receivers (Figure 2-2).
3. Verify 429 RX 1 LOWSPEED OK and 429 RX 2 LOWSPEED OK via the Main
Status/Loopback Test Page (Figure 5-12).
______ OK
4. Verify 429 RX 1 HIGHSPEED OK and 429 RX 2 HIGHSPEED OK via the Main
Status/Loopback Test Page (Figure 5-12).
______ OK
Figure 5-12. Main Status/Loopback Test Page
______ OK
Page 5-52
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
5.7.6.24
For:
RS232 Ports
GPS RS232 OUT 1 (J1-56)
GPS RS232 IN 1 (J1-57)
GPS RS232 OUT 2 (J1-58)
GPS RS232 IN 2 (J1-59)
GPS RS232 OUT 3 (J1-41)
GPS RS232 IN 3 (J1-42)
GPS RS232 OUT 4 (J1-54)
GPS RS232 IN 4 (J1-55)
A.
GPS RS232 1
1. Test both receiver and transmitter.
2. Connect the transmitter to the receiver.
3. Verify GPS RS232 1 OK via the test page.
_____OK
B.
GPS RS232 2
1. Test both receiver and transmitter.
2. Connect the transmitter to the receiver.
3. Verify GPS RS232 2 OK via the unit test page (ensure connection in loopback).
_____OK
C.
GPS RS232 3
1. Test both receiver and transmitter.
2. Connect the transmitter to the receiver.
3. Verify GPS RS232 3 OK via test page.
_____OK
D.
GPS RS232 4
1. Test both receiver and transmitter.
2. Connect the transmitter to the receiver.
3. Verify GPS RS232 4 OK via test page.
_____OK
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 5-53
Rev. C
5.7.6.25
OBS
The load used in the OBS test consists of a calibrated OBS
resolver, Precision Track Selector or equivalent, and must be
connected to the GPS OBS inputs.
The OBS bearing must be consistent to within r2 degrees of the bearing setting. If this output
requires an alignment, this alignment can be done on the unit level by using the configuration
page (NOTE: not the Test Page “MAIN CDI/OBS CONFIG”). See Section 5 for instructions on
using the configuration page.
On this page, monitor the current measured angle using the “SELECTED COURSE” field and
calibrate the unit using the “Calibrate to 150?” field (do this after the bearing is selected to 150
degrees). Note that the angle displayed is rounded to one tenth of a degree.
For:
MAIN OBS ROTOR C (J1-31)
MAIN OBS ROTOR H (J1-32)
MAIN OBS STATOR D (J1-33)
MAIN OBS STATOR E (J1-34)
MAIN OBS STATOR F (J1-35)
MAIN OBS STATOR G (J1-36)
1. Set test set to the following angles.
2. Using the page “MAIN CDI/OBS CONFIG” configuration page verify angle via the Main
CDI/OBS Config Test Page (Figure 5-13).
60q_____(60 r2q)
150q_____(150 r2q)
240q_____(240 r2q)
330q_____(330 r2q)
Figure 5-13. Main CDI/OBS Configuration Page
This completes the testing section.
Page 5-54
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
SECTION 6
PARTS AND ASSEMBLIES
6.1
INTRODUCTION
This section lists major parts of the 400 Series. The part numbers listed in this section of the
manual are given to aid in assembly and disassembly of the unit only, not for identifying
orderable parts. For orderable part information, see the GARMIN Aviation Distributor Service
Parts Price List or contact GARMIN directly.
6.2
TABLES
The following tables contain equipment breakdowns to the assembly level. Included in the tables
are part numbers that can be used with the corresponding illustrations in Section 7 for ease of
identification.
GNS 430/430A
Table
Part Description
Unit P/N
Figure
6-1
Sub-Assy, GNS430, 28V, Black
011-00280-00
7-1
6-2
Sub-Assy, GNS430, 14/28V, Black
011-00280-10
7-1
6-3
Sub-Assy, GNS430, 14/28V, Gray
011-00280-30
7-1
6-4
Sub-Assy, GNS430A, 28V, Black
011-00836-00
7-1
6-5
Sub-Assy, GNS430A, 28V, Gray
011-00836-10
7-1
6-6
Main Chassis Assy, GNS430, 14/28V
011-00283-10
7-2
6-7
Main Chassis Assy, GNS430, 14/28V, DO
011-00283-30
7-2
6-8
Main Chassis Assy, GNS430, 28V
011-00283-00
7-2
6-9
Main Chassis Assy, GNS430A, 28V
011-00283-20
7-2
6-10
Nav Chassis Sub-Assy, GNS430/430A
011-00282-00
7-3
6-11
Sub-Assy, CDU, GNS430 Black
011-00281-00
7-4
6-12
Sub-Assy, CDU, GNS430 Gray
011-00281-04
7-4
6-13
Sub-Assy, CDU, GNS430A Black
011-00281-00
7-4
6-14
Sub-Assy, CDU, GNS430A Gray
011-00281-04
7-4
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-1
Rev. C
GNC420/420A
Table
Part Description
Unit P/N
Figure
6-15
Sub-Assy, GNC420, 28V, Black
011-00506-00
7-5
6-16
Sub-Assy, GNC420, 14/28V, Black
011-00506-10
7-5
6-17
Sub-Assy, GNC420, 14/28V, Gray
011-00506-30
7-5
6-18
Sub-Assy, GNC420A, 28V, Black
011-00837-00
7-8
6-19
Sub-Assy, GNC420A, 28V, Gray
011-00837-10
7-8
6-20
Main Chassis Assy, GNC420, 28V
011-00283-01
7-6
6-21
Main Chassis Assy, GNC420, 14/28V
011-00283-11
7-6
6-22
Main Chassis Assy, GNC420, 14/28V, DO
011-00283-31
7-6
6-23
Main Chassis Assy, GNC420A, 28V
011-00283-21
7-6
6-24
Nav Chassis Sub-Assy, GNC420/420A
011-00282-01
7-7
6-25
Sub-Assy, CDU, GNC420 Black
011-00281-01
7-4
6-26
Sub-Assy, CDU, GNC420 Gray
011-00281-05
7-4
6-27
Sub-Assy, CDU, GNC420A Black
011-00281-01
7-4
6-28
Sub-Assy, CDU, GNC420A Gray
011-00281-05
7-4
GPS400
Table
Part Description
Unit P/N
Figure
6-29
Sub-Assy, GPS400, 14/28V, Black
011-00504-00
7-10
6-30
Sub-Assy, GPS400, 14/28V, Gray
011-00504-10
7-10
6-31
Main Chassis Assy, GPS400, 14/28V
011-00283-03
7-9
6-32
Main Chassis Assy, GPS400, 14/28V, DO
011-00283-33
7-9
6-33
Nav Chassis Sub-Assy, GPS400
011-00282-01
7-7
6-34
Sub-Assy, CDU, GPS400, Black
011-00281-03
7-4
6-35
Sub-Assy, CDU, GPS400, Gray
011-00281-06
7-4
Page 6-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Miscellaneous Parts
Part
Part Description
Unit P/N
Figure
F600
Fuse, Submini, Axial, 7 Amp
350-00003-15
3-2
F850
Fuse, SMT, Fast, 5 Amp
350-B0500-01
3-1
F853
Fuse, 1206, 0.75 Amp
350-B1075-00
3-1
F852
Fuse, 1206, 2 Amp
350-B1200-00
3-1
F851
Fuse, 1206, 3 Amp
350-B1300-00
3-1
R611
Resistor, 1W, .01 ohm, 1%, 2512
900-BR010-F0
3-3
F501
Fuse, 1206, 1 Amp
350-B1100-00
3-4
F502
Fuse, 1206, 1 Amp
350-B1100-00
3-4
B170
Lithium Cell, 3V, PC Mount, 850 mAH
360-00009-00
4-2
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-3
Rev. C
6.2.1
GNS 430/430A Tables
Table 6-1. Sub-Assy, GNS 430, 28V, Black (Unit P/N 011-00280-00, Figure 7-1)
Part Number
Part Name
Qty
011-00281-00
Sub-Assy,CDU,GNS430
1
011-00282-00
Sub-Assy,Nav Chassis,GNC400
1
011-00283-00
Sub-Assy,Main Chas,GNS430,28V
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-00
Lbl,S/N,GNS430
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
325-00063-00
Ca Asy,Rbn Ca Stp,2mm Ctrs,2x5
1
Table 6-2. Sub-Assy, GNS 430, 14/28V, Black (Unit P/N 011-00280-10, Figure 7-1)
Part Number
Page 6-4
Rev. C
Part Name
Qty
011-00281-00
Sub-Assy,CDU,GNS430
1
011-00282-00
Sub-Assy,Nav Chassis,GNC400
1
011-00283-30
Sub,Mn Chassis,GNS430,14/28V,DO
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-04
Lbl,S/N,14/28V,GNS430
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
325-00063-00
Rbn Ca Stp,2mm Ctrs,2x5
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-3. Sub-Assy, GNS 430, 14/28V, Gray (Unit P/N 011-00280-30, Figure 7-1)
Part Number
Part Name
Qty
011-00281-04
Sub-Assy,CDU,GNS430,Gray
1
011-00282-00
Sub-Assy,Nav Chassis,GNC400
1
011-00283-30
Sub,Mn Chassis,GNS430,14/28V,DO
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-08
Lbl,S/N,14/28V, GNS430,Gray
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
325-00063-00
Rbn Ca Stp,2mm Ctrs,2x5
1
Table 6-4. Sub-Assy GNS 430A, 28V, Black (Unit P/N 011-00836-00, Figure 7-1)
Part Number
011-00281-00
Part Name
Qty
Sub-Assy,CDU,GNS430
1
011-00282-00
Sub-Assy,Nav Chassis,GNC400
1
011-00283-20
Sub,Main Chassis,GNS430A
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-06
Lbl,S/N,GNS430A,28V,16W
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
325-00063-00
Rbn Ca Stp,2mm Ctrs,2x5
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-5
Rev. C
Table 6-5. Sub-Assy GNS 430A, 28V, Gray (Unit P/N 011-00836-10, Figure 7-1)
Part Number
Page 6-6
Rev. C
Part Name
Qty
011-00281-04
Sub-Assy,CDU,GNS430,Gray
1
011-00282-00
Sub-Assy,Nav Chassis,GNC400
1
011-00283-20
Sub,Main Chassis,GNS430A
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-11
Lbl,S/N,GNS430A,Gray
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
325-00063-00
Ca Asy,Rbn Ca Stp,2mm Ctrs,2x5
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-6. Main Chassis Assy, GNS 430, 14/28V (Unit P/N 011-00283-10, Figure 7-2)
Part Number
Part Name
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00214-05
PCB Assy,Comm,10W 14/28V
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-32
PCB Assy,GNS430 Main Bd,DO
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-08
Screw,4-40x.250,PHP,SS/P,w/NYL
2
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-10001-00
Cable Tie,4.0"
2
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
2
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-00018-00
Xstr,Mosfet,N-Ch,Push-Pull,VHF
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-7
Rev. C
Table 6-7. Main Chassis Assy, GNS 430, 14/28V, DO (Unit P/N 011-00283-30, Fig. 7-2)
Part Number
Page 6-8
Rev. C
Part Name
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00214-05
PCB Assy,Comm,10W 14/28V
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-32
PCB Assy,GNS430 Main Bd,D,O
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chas's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-08
Screw,4-40x.250,PHP,SS/P,w/NYL
2
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-10001-00
Cable Tie,4.0"
2
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
2
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-00018-00
Xstr,Mosfet,N-Ch,Push-Pull,VHF
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-8. Main Chassis Assy, GNS 430, 28V (Unit P/N 011-00283-00, Fig. 7-2)
Part Number
Part Name
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00214-03
PCB Assy,Comm,2.5ppm TCXO
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-32
PCB Assy,GNS430 Main Bd,DO
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
214-00023-00
Stdoff,Male/Fem,Hex,4-40,.38"
2
231-10001-00
Cable Tie,4.0"
1
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
1
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-00018-00
Xstr,Mosfet,N-Ch,Push-Pull,VHF
1
925-D2120-00 Posistor,330-1.5K Ohm,120C,THM
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
1
Page 6-9
Rev. C
Table 6-9. Main Chassis Assy, GNS 430A, 28V (Unit P/N 011-00283-20, Figure 7-2)
Part Number
011-00474-01
Page 6-10
Rev. C
Part Name
Qty
Sub-Assy,GPS Module,GNC TSOII
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-32
PCB Assy,GNS430 Main Bd,DO
1
012-00611-00
PCB Assy,Comm Xcvr,16 Watt
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chas w/o Studs,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-08
Screw,4-40x.250,PHP,SS/P,w/NYL
2
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-10001-00
Cable Tie,4.0"
2
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
2
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-10002-02
Xstr,Mosfet,N-Ch,BB,28V,D1018
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-10. Nav Chassis Sub-Assy, GNS 430/430A (Unit P/N 011-00282-00, Figure 7-3)
Part Number
Part Name
Qty
012-00195-20
PCB Assy,Nav Rcvr,GNC400/500
1
012-00212-10
PCB Assy,GNC400 Glide Slope
1
115-00209-00
SMP,Cover,Cont,GNC400 Nav Bd
1
115-00213-00
SMP,Cover,RF,GNC400 Nav Bd
1
115-00214-00
SMP,Cover,Mdl,GNC400 Nav Bd
1
115-00221-00
SMP,Cover,GNC400 G/S Bd
1
115-00321-00
SMP,Fan Shield,GNC400
1
125-00006-00
DCP Pawl,Latch,GPS150
1
125-00035-00
DCP,Nav Chassis,GNC400
1
210-00043-00
Nut,Special,M4x0.7
1
211-00027-01
Screw,Insert/Extract w/Flat
1
211-00037-00
Set Screw,M3x0.5x2.6
2
211-60234-04
Screw,4-40x.125,PHP,SS/P,w/NYL
7
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
1
211-60234-10
Screw,4-40x.375,PHP,SS/P,w/NYL
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
2
212-20004-00
Wshr,Flat,Non-standard,S.S.
1
233-00009-00
Pin,Nylon
1
250-00048-00
Insulator,Nav Bd,GNC400
1
250-00049-00
Insulator,G/S Bd,GNC400
1
253-00053-01
Gasket,EMI,2.685 Length
1
253-00053-02
Gasket,EMI,0.750 Length
2
325-00063-01
Ca Asy,Rbn Ca Stp,2mm Ctrs,2x8
1
330-00070-03
Conn,Coaxial,Blind Thd
2
371-00001-00
Blowers,Fan,30x30x6mm,5VDC
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-11
Rev. C
Table 6-11. Sub-Assy, CDU, GNS 430, Black (Unit P/N 011-00281-00, Figure 7-4)
Page 6-12
Rev. C
Bub
Part Number
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
Part Name
Qty
1
6
210-00021-00
Nut,Hex,Reduced
1
7
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
29
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
30
211-00030-00
Pivot Pin,Power Switch
1
31
210-00021-00
Nut,Hex,Reduced
1
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
4
410-00013-01
Rtry,Pot,w/Mom Push Sw,w/hole
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TFM,1.7x5.0,FLHP,S/C
5
13
125-00041-04
DCP,Bezel,Painted,w/Blk Trim
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-00
CDU Front Panel,GNS430,Black
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
19
430-00020-02
Knob,Vol,w/"V" and Dot
1
21
430-00019-01
Knob,Inner,w/"PUSH C/V"
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-12. Sub-Assy, CDU, GNS 430, Gray (Unit P/N 011-00281-04, Figure 7-4)
Bub
Part Number
Part Name
Qty
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
6
210-00021-00
Nut,Hex,Reduced
1
7
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
29
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
30
211-00030-00
Pivot Pin,Power Switch
1
31
210-00021-00
Nut,Hex,Reduced
1
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
4
410-00013-01
Rtry,Pot,w/Mom Push Sw,w/hole
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-05
DCP,Bezel,Painted,Gray
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-10
CDU Front Panel,GNS430,Gray
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
19
430-00020-02
Knob,Vol,w/"V" and Dot
1
21
430-00019-01
Knob,Inner,w/"PUSH C/V"
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-13
Rev. C
Table 6-13. Sub-Assy, CDU, GNS 430A, Black (Unit P/N 011-00281-00, Figure 7-4)
Bub
Page 6-14
Rev. C
Part Number
Part Name
Qty
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
6
210-00021-00
Nut,Hex,Reduced
1
7
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
29
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
30
211-00030-00
Pivot Pin,Power Switch
1
31
210-00021-00
Nut,Hex,Reduced
1
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
4
410-00013-01
Rtry,Pot,w/Mom Push Sw,w/hole
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-04
DCP,Bezel,Painted,w/Blk Trim
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-00
CDU Front Panel,GNS430,Black
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
19
430-00020-02
Knob,Vol,w/"V" and Dot
1
21
430-00019-01
Knob,Inner,w/"PUSH C/V"
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-14. Sub-Assy, CDU, GNS 430A, Gray (Unit P/N 011-00281-04, Figure 7-4)
Bub
Part Number
Part Name
Qty
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
6
210-00021-00
Nut,Hex,Reduced
1
7
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
29
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
30
211-00030-00
Pivot Pin,Power Switch
1
31
210-00021-00
Nut,Hex,Reduced
1
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
4
410-00013-01
Rtry,Pot,w/Mom Push Sw,w/hole
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-05
DCP,Bezel,Painted,Gray
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-10
CDU Front Panel,GNS430,Gray
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
19
430-00020-02
Knob,Vol,w/"V" and Dot
1
21
430-00019-01
Knob,Inner,w/"PUSH C/V"
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-15
Rev. C
6.2.3
GNC 420/420A Tables
Table 6-15. Sub-Assy, GNC 420, 28V, Black (Unit P/N 011-00506-00, Figure 7-5)
Part Number
Part Name
Qty
011-00281-01
Sub-Assy,CDU,GNC420
1
011-00282-01
Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-01
Sub-Assy,Main Chas,GNC420,28V
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-02
Lbl,S/N,GNC420
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
Table 6-16. Sub-Assy, GNC 420, 14/28V Black (Unit P/N 011-00506-10, Figure 7-5)
Part Number
Page 6-16
Rev. C
Part Name
Qty
011-00281-01
Sub-Assy,CDU,GNC420
1
011-00282-01
Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-31
Sub,Mn Chassis,GNC420,Gray,DO
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-05
Lbl,S/N,14/28V,GNC420
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-17. Sub-Assy, GNC 420, 14/28V, Gray (Unit P/N 011-00506-30, Figure 7-5)
Part Number
Part Name
Qty
011-00281-05
Sub-Assy,CDU,GNC420,Gray
1
011-00282-01
Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-31
Sub,Mn Chassis,GNC420,Gray,DO
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-09
Lbl,S/N, 14/28V, GNC420,Gray
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
Table 6-18. Sub-Assy, GNC 420A, 28V, Black (Unit P/N 011-00837-00, Figure 7-8)
Part Number
Part Name
Qty
011-00281-01
Sub-Assy,CDU,GNC420
1
011-00282-01
Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-21
Sub,Main Chassis,GNC420A
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-07
Lbl,S/N,GNC420A,Black
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-17
Rev. C
Table 6-19. Sub-Assy, GNC 420A, 28V Gray (Unit P/N 011-00837-10, Figure 7-8)
Part Number
011-00281-05
Page 6-18
Rev. C
Part Name
Qty
Sub-Assy,CDU,GNC420,Gray
1
011-00282-01
Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-21
Sub,Main Chassis,GNC420A
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-02
PMP,Bezel Cover,GNS430
1
161-00201-12
Lbl,S/N,GNC420A,Gray
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
253-00062-01
High Permb Shd,4"x6",Flat
1
253-00062-02
High Permb Shd,4"x2.25",Flat
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-20. Main Chassis Assy, GNC 420, 28V (Unit P/N 011-00283-01, Figure 7-6)
Part Number
Part Name
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00214-03
PCB Assy,Comm,2.5ppm TCXO
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-22
PCB Assy,GNC420 Main Bd,DO
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
214-00023-00
Stdoff,Male/Fem,Hex,4-40,.38"
2
231-10001-00
Cable Tie,4.0"
1
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
1
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-00018-00
Xstr,Mosfet,N-Ch,Push-Pull,VHF
1
925-D2120-00
Posistor,330-1.5K Ohm,120C,THM
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-19
Rev. C
Table 6-21. Main Chassis Assy, GNC 420, 14/28V (Unit P/N 011-00283-11, Fig. 7-6)
Part Number
Page 6-20
Rev. C
Part Name
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00214-05
PCB Assy,Comm,10W 14/28V
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-22
PCB Assy,GNC420 Main Bd,DO
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-08
Screw,4-40x.250,PHP,SS/P,w/NYL
2
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-10001-00
Cable Tie,4.0"
2
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
2
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-00018-00
Xstr,Mosfet,N-Ch,Push-Pull,VHF
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-22. Main Chassis Assy, GNC 420, 14/28V, DO, (P/N 011-00283-31, Figure 7-6)
Item
Description
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00214-05
PCB Assy,Comm,10W 14/28V
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-22
PCB Assy,GNC420 Main Bd,D,O
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-08
Screw,4-40x.250,PHP,SS/P,w/NYL
2
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-10001-00
Cable Tie,4.0"
2
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
2
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-00018-00
Xstr,Mosfet,N-Ch,Push-Pull,VHF
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-21
Rev. C
Table 6-23. Main Chassis Sub-Assy, GNC 420A, 28V (Unit P/N 011-00283-21, Figure 7-6)
Part Number
011-00474-01
Part Name
Qty
Sub-Assy,GPS Module,GNC TSOII
1
012-00611-00
PCB Assy,Comm Xcvr,16 Watt
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-22
PCB Assy,GNC420 Main Bd,DO
1
115-00203-00
SMP,Cover,Cont,GNC400 Comm Bd
1
115-00205-00
SMP,Cover,Synth,GNC400 Comm Bd
1
115-00207-00
SMP,Cover,RF,GNC400 Comm Bd
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
9
211-60234-08
Screw,4-40x.250,PHP,SS/P,w/NYL
2
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-10001-00
Cable Tie,4.0"
2
250-00047-00
Insulator,Comm Bd,GNC400
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
253-00061-00
Seal,EMI,GNC400/500
1
253-00062-03
High Permb Shd,4"x1",Flat
1
310-00009-08
Cable,Coax,RG-178B/U,6.39 LONG
2
330-00070-04
Conn,Coax,Blind Mate,Thd Mt
1
334-00039-01
Header,Bd to Bd,2x5
1
334-00039-02
Header,Bd to Bd,2x6
1
670-10002-02
Xstr,Mosfet,N-Ch,BB,28V,250W
1
Table 6-24. Nav Chassis Sub-Assy, GNC 420/420A (Unit P/N 011-00282-01, Figure 7-7)
Part Number
Page 6-22
Rev. C
Part Name
Qty
115-00321-00
SMP,Fan Shield,GNC400
1
115-00337-00
SMP,Conn Cover,25D
1
125-00006-00
DCP Pawl,Latch,GPS150
1
125-00035-00
DCP,Nav Chassis,GNC400
1
210-00043-00
Nut,Special,M4x0.7
1
211-00027-01
Screw,Insert/Extract w/Flat
1
211-00037-00
Set Screw,M3x0.5x2.6
2
211-60234-10
Screw,4-40x.375,PHP,SS/P,w/NYL
3
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
2
212-20004-00
Wshr,Flat,Non-Standard,S.S.
1
231-00020-00
Plug,BNC Hole
2
233-00009-00
Pin,Nylon
1
371-00001-00
Blowers,Fan,30x30x6mm,5VDC
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-25. Sub-Assy, CDU, GNC 420, Black (Unit P/N 011-00281-01, Figure 7-4)
Bub Number
Item
Description
Qty
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
31
210-00021-00
Nut,Hex,Reduced
1
30
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-04
DCP,Bezel,Painted,w/Blk Trim
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-01
CDU Front Panel,GNC420,Black
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
21
430-00019-00
Knob,Inner,w/o Decoration
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-23
Rev. C
Table 6-26. Sub-Assy, CDU, GNC 420, Gray (Unit 011-00281-05, Figure 7-4)
Page 6-24
Rev. C
Bub Number
Part Number
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
Part Name
Qty
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
31
210-00021-00
Nut,Hex,Reduced
1
30
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-05
DCP,Bezel,Painted,Gray
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-11
CDU Front Panel,GNC420,Gray
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
21
430-00019-00
Knob,Inner,w/o Decoration
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-27. Sub-Assy, CDU, GNC 420A, Black (Unit P/N 011-00281-01, Figure 7-4)
Bub Number
Item
Description
Qty
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
31
210-00021-00
Nut,Hex,Reduced
1
30
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-04
DCP,Bezel,Painted,w/Blk Trim
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-01
CDU Front Panel,GNC420,Black
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
21
430-00019-00
Knob,Inner,w/o Decoration
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-25
Rev. C
Table 6-28. Sub-Assy, CDU, GNC 420A, Gray (Unit 011-00281-05, Figure 7-4)
Page 6-26
Rev. C
Bub Number
Part Number
32
011-00340-00
Sub-Assy,Inc Dec Push Switch
Part Name
Qty
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
20
430-00013-01
Knob Assy,Outer,GNC400/500
1
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
31
210-00021-00
Nut,Hex,Reduced
1
30
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-05
DCP,Bezel,Painted,Gray
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-11
CDU Front Panel,GNC420,Gray
1
18
430-00020-01
Knob,Vol,w/"C" and Dot
1
21
430-00019-00
Knob,Inner,w/o Decoration
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
6.2.4
GPS 400 Tables
Table 6-29. Sub-Assy, GPS 400, 14/28V, Black (Unit P/N 011-00504-00, Figure 7-10)
Part Number
Part Name
Qty
011-00281-03
Sub-Assy,CDU,GPS400
1
011-00282-01
Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-33
Sub,Main Chassis,GPS400,DO
1
011-00460-40
Sub-Assy,Memory Card,Dummy
1
115-00218-00
SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00
SMP,Hinge,GNC400,Front
1
115-00246-01
SMP,Hinge,GNC400,Rear
1
145-00480-03
PMP,Bezel Cover,GPS400
1
161-00201-01
Lbl,S/N,GPS400
1
161-00422-00
Lbl,Prot Bezel Cover Warning
1
211-00052-01
Screw,Shoulder,Special, Nylon
2
211-00054-01
Hinge Pin, Nylon Locking
2
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10
Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
6
Table 6-30. Sub-Assy, GPS400, 14/28V, Gray (Unit P/N 011-00504-10, Figure 7-10)
Part Number
Part Name
011-00281-06 Sub-Assy,CDU,GPS400,Gray
Qty
1
011-00282-01 Sub-Assy,Nav Chassis,w/o Nav
1
011-00283-33 Sub,Main Chassis,GPS400,DO
1
011-00460-40 Sub-Assy,Memory Card,Dummy
1
115-00218-00 SMP,Cover,Top,Main Chas,GNC400
1
115-00246-00 SMP,Hinge,GNC400,Front
1
115-00246-01 SMP,Hinge,GNC400,Rear
1
145-00480-03 PMP,Bezel Cover,GPS400
1
161-00201-10 Lbl,S/N,GPS400,Gray
1
161-00422-00 Lbl,Prot Bezel Cover Warning
1
211-00052-01 Screw,Shoulder,Special, Nylon
2
211-00054-01 Hinge Pin, Nylon Locking
2
211-60234-06 Screw,4-40x.187,PHP,SS/P,w/NYL
2
211-60237-10 Screw,6-32x.375,PHP,SS/P,w/NYL
2
211-63234-10 Scr,4-40x.375,FLHP100,SS/P,Nyl
6
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-27
Rev. C
Table 6-31. Main Chassis Assy, GPS 400 14/28V, (Unit P/N 011-00283-03, Figure 7-9)
Part Number
Part Name
Qty
011-00474-01
Sub-Assy,GPS Module,GNC TSOII
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-02
PCB Assy,GPS400 Main Bd,DO
1
115-00337-00
SMP,Conn Cover,25D
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
5
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-00020-00
Plug,BNC Hole
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
334-00039-02
Header,Bd to Bd,2x6
1
Table 6-32. Main Chassis Assy, GPS 400, 14/28V, DO (Unit P/N 011-00283-33, Figure 7-9)
Part Number
011-00474-01
Part Name
Qty
Sub-Assy,GPS Module,GNC TSOII
1
012-00256-00
PCB Assy,GNC400 Inverter Bd
1
012-00296-00
PCB Assy,GNC400 Map Bd
1
012-00347-02
PCB Assy,GPS400 Main Bd,DO
1
115-00337-00
SMP,Conn Cover,25D
1
115-00354-00
SMP,Outer Cvr,GPS,GNC500
1
125-00034-01
Main Chs's w/o Stud,GNC400/500
1
211-60234-06
Screw,4-40x.187,PHP,SS/P,w/NYL
5
211-60234-11
Screw,4-40x.437,PHP,SS/P,w/NYL
1
211-60334-08
Screw,4-40x.250,PHP,SS/BO,
2
211-63234-10
Scr,4-40x.375,FLHP100,SS/P,Nyl
7
231-00020-00
Plug,BNC Hole
1
250-00050-01
Insulator,w/Boss,Main,GNC400
1
250-00051-00
Insulator,Inverter,GNC400
1
334-00039-02
Header,Bd to Bd,2x6
1
Table 6-33. Nav Chassis Sub-Assy, GPS 400 (Unit P/N 011-00282-01, Figure 7-7)
The GPS 400 Nav Chassis Assy is the same as the GNC 420/420A Nav Chassis Sub-Assy Parts
List (Table 6-24).
Page 6-28
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table 6-34. Sub-Assembly, CDU, GPS 400, Black (Unit P/N 011-00281-03), Fig 7-4)
Bub
Part Number
Part Name
Qty
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
6
210-00021-00
Nut,Hex,Reduced
1
7
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-04
DCP,Bezel,Painted,w/Blk Trim
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-03
CDU Front Panel,GPS400,Black
1
18
430-00020-00
Knob Vol,w/Dot
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
33
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
1
34
212-00021-00
Wshr,Special,GPS400
1
36
115-00341-00
SMP,Cover,GPS400
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-000140-05
Page 6-29
Rev. C
Table 6-35. Sub-Assembly, CDU, GPS 400, Gray (Unit P/N 011-00281-06, Fig 7-4)
Bub
Page 6-30
Rev. C
Part Number
Part Name
Qty
1
011-00340-00
Sub-Assy,Inc Dec Push Switch
1
2
211-60232-06
Screw,2-56x.187,PHP,SS/P,w/NYL
6
3
410-00012-01
Rtry Sw,Pot,w/Mom Push Sw,
1
5
012-00258-00
PCB Assy,GNC400 Interface Bd
1
6
210-00021-00
Nut,Hex,Reduced
1
7
211-00030-00
Pivot Pin,Power Switch
1
8
117-00028-00
Shaft,Pot,Machined,GNC4XX
1
9
440-00016-03
LCD,Module,DSTN,Color,W/Lens
1
11
145-00267-00
PMP,Data Card Slots
1
12
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
5
13
125-00041-05
DCP,Bezel,Painted, Gray
1
14
211-63232-08
Screw,2-56x.250,FLHP100,SS/P,
3
15
012-00257-00
PCB Assy,GNC400 Keyboard
1
17
414-00034-13
CDU Front Panel,GPS400,Gray
1
18
430-00020-00
Knob Vol,w/Dot
1
22
430-00019-02
Knob,Inner,w/"PUSH CRSR"
1
23
340-00035-00
Snapdome Array,GNC4XX
1
25
012-00270-00
PCB Assy,Flex Ckt,Dsply/Kybd,
1
26
012-00271-00
PCB Assy,Flex Ckt,Pot,GNC400
1
27
335-00044-10
Skt Strip,2mm,RA,4x10
1
28
430-00013-01
Knob Assy,Outer,GNC400/500
1
33
211-14400-05
Screw,TCM,1.7x5.0,FLHP,S/C
1
34
212-00021-00
Wshr,Special,GPS400
1
36
115-00341-00
SMP,Cover,GPS400
1
37
253-00068-00
Gasket,Foam,Adh Backed
1
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
SECTION 7
ASSEMBLY DRAWINGS
7.1
INTRODUCTION
This section contains assembly drawings to aid in assembly and disassembly of the 400 Series
units. Part numbers and drawing notes can be used as reference information during disassembly
and assembly. Note: The revision levels of the drawings are current at the time of manual
publication and are subject to change without notice.
7.2
DRAWING LIST
The following drawings are included in this section:
GNS 430:
x
Figure 7-1—Sub-Assembly, GNS 430 (Dwg. No. 015-00280-XX, Rev. P)
x
Figure 7-2—Main Chassis Assembly, GNS 430(A) (Dwg. No. 015-00283-00, Rev. R)
x
Figure 7-3—Nav Chassis Assembly, GNC 400 (Dwg. No. 015-00282-00, Rev. K)
x
Figure 7-4GNC 4XX CDU Assembly (Sheet 1 of 2) (Dwg. No. 015-00281-XX, Rev. F)
x
Figure 7-4GNC 4XX CDU Assembly (Sheet 2 of 2) (Dwg. No. 015-00281-XX, Rev. F)
GNS 430A:
Use the GNS 430 Figures for the GNS 430A.
GNC 420:
x
Figure 7-5—Sub-Assembly, GNC 420 (Dwg. No. 015-00506-XX, Rev. N)
x
Figure 7-6—Main Chassis Assembly, GNC 420(A) (Dwg. No. 015-00283-01, Rev. K )
x
Figure 7-7—Sub-Assy, GNC 420 Nav Chassis, W/O Nav (Dwg. No. 015-00282-01, Rev. E )
x
GNC 420 CDU Assembly Drawing (Use Figure 7-4)
GNC 420A:
x
Figure 7-8—Sub-Assy, GNC 420A (Dwg. No. 015-00837-XX, Rev. A )
x
Main Chassis Assembly, GNC 420A (Use Figure 7-6)
x
Sub-Assy, GNC 420 Nav Chassis, W/O Nav (Use Figure 7-7)
x
GNC 420A CDU Assembly Drawing (Use Figure 7-4)
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page 7-1
Rev. C
GPS 400:
x
GPS 400 Assy Drawing (Dwg. No. 015-00504-XX, Rev. G, Figure 7-10)
x
Figure 7-9—Main Chassis Assembly, GPS 400 (Dwg. No. 015-00283-03, Rev. J)
x
GPS 400 Sub-Assy, Nav Chassis, W/O Nav (Use Figure 7-7)
x
GPS 400 CDU Assembly Drawing (Use Figure 7-4)
Page 7-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-1. Sub-Assy, GNS 430 (Dwg. No. 015-00280-XX, Rev. P)
Page 7-3 (page 7-4 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-2. Main Chassis Assy, GNS 430(A) (Dwg. No. 015-00283-00, Rev. R)
Page 7-5 (page 7-6 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-3. Nav Chassis Assy, GNC 400 (Dwg. No. 015-00282-00, Rev. K)
Page 7-7 (page 7-8 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-4. GNC 4XX CDU Assy (Sheet 1 of 2) (Dwg. No. 015-00281-XX, Rev. F )
Page 7-9 (Page 7-10 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-4. GNC 4XX CDU Assy (Sheet 2 of 2) (Dwg. No. 015-00281-XX, Rev. F )
Page 7-11 (Page 7-12 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-5. Sub-Assy, GNC 420 (Dwg. No. 015-00506-XX, Rev. N)
Page 7-13 (page 7-14 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-6. Main Chassis Assy, GNC 420(A) (Dwg. No. 015-00283-01, Rev. K)
Page 7-15 (page 7-16 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-7. Nav Chassis Assy, W/O Nav (Dwg. No. 015-00282-01, Rev. E)
Page 7-17 (page 7-18 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-8. Sub-Assy, GNC 420A (Dwg. No. 015-00837-XX, Rev. A)
Page 7-19 (page 7-20 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-9. Main Chassis Assy, GPS 400 (Dwg. No. 015-00283-03, Rev. J)
Page 7-21 (page 7-22 blank)
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Figure 7-10. Assy Dwg, GPS 400 (Dwg. No. 015-00504-XX, Rev. G)
Page 7-23 (Page 7-24 blank)
Rev. C
APPENDIX A
GNC 420A AND GNS 430A
A.1
DESCRIPTION
This appendix describes version A of the GNC 420 and the GNS 430. The ‘A’ versions contain a
16 watt VHF Com Transmitter as opposed to a 10 watt transmitter. There is one Com Board part
number for the GNC 420 and GNS 430 ‘A’ versions which is 012-00611-00.
A.2
‘A’ VERSION UNIT PART NUMBERS
GNC 420A
UNIT P/N
COLOR
OPERATING
VOLTAGE
MINIMUM
XMIT PWR
011-00837-00
BLACK
28 V Only
16 W
011-00837-10
GRAY
28 V Only
16 W
GNS 430A
A.3
UNIT P/N
COLOR
OPERATING
VOLTAGE
MINIMUM
XMIT PWR
011-00836-00
BLACK
28 V Only
16 W
011-00836-10
GRAY
28 V Only
16 W
TROUBLESHOOTING
Follow the procedures in Section 3 to troubleshoot the GNC 420A and GNS 430A. The following
exceptions are given:
Table A-1. Unit Main Board Power Supply Maximum Current
Unit (Main Board) Unit Status
Max Current (A)
@ 27.5 V
GNC 420A
ON
RX—0.99
TX—3.36
GNS 430A
ON
RX—1.17
TX—3.98
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page A-1
Rev. C
The Com Voltage and Current requirements for the GNS 420A and GNS 430A are listed in Table
A-2.
Table A-2. Voltage and Current Supply Requirements
A.4
Connector / Pin
DC Voltage
Tolerance(V)
Max Current (DC)
Conditions
J2, Pins 11 & 12
+27.5
r.4
3.0 A
Transmit Mode
DISASSEMBLY AND ASSEMBLY
Disassemble the GNS 430A according to the procedures given in Section 4.
A.5
ALIGNMENT, CALIBRATION, AND TESTING
Perform testing according to the procedures given in Section 5.
A.6
REPLACEABLE PARTS AND ASSEMBLIES
See Section 6 for replaceable parts and assemblies.
A.7
ASSEMBLY DRAWING
See Page 7-1 for a list of applicable drawings.
Page A-2
Rev. C
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
APPENDIX B
CONNECTOR I/O DESCRIPTIONS
B.1
I/O DESCRIPTION
This appendix contains tables describing various I/O information used in the 400 Series.
Table B-1. I/O Descriptions
B.2
IO Code
Description
I
INPUT
O
OUTPUT
B
BI-DIRECTIONAL
INTERNAL AND EXTERNAL CONNECTORS
Table B-2. Internal and External Connections
Board
MAIN BOARD
COM (GNC 420 AND GNS
430 ONLY)
NAV (GNS 430 ONLY)
GLIDESLOPE (J7; GNS 430
ONLY)
KEYBOARD
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Connector
Designation
J1
J8
J9
J11
J12
J14
J16
J17
P13
J2
J4
J26
J6
J5
J10
J24
J25
J7
J23
Interface
Aircraft Mounting Rack
GPS Module
Nav and Glideslope
Com Board
LCD Flex
Data Base Card Flex
Map Board
Fan
Inverter Board
Aircraft Mounting Rack
Antenna In/Out
Main Board
Aircraft Mounting Rack
Antenna In
Main Board
Glideslope
Connects Nav and Glideslope
Antenna In
LCD Flex
Page B-1
Rev. C
Table B-2. Internal and External Connections (continued)
INVERTER BOARD
GPS MODULE ( ALL UNITS)
INTERFACE BOARD
DISPLAY MODULE
DATA BASE CARDS
MAP BOARD
MOMENTARY PUSH BD (ALL
UNITS)
MOMENTARY PUSH BD (GNS
430 ONLY)
B.3
J13
J26
J27
J101
J3
J19
J20
J21
J22
----P16
J15 RIGHT
J15 LEFT
Main Board
Display Module CCTF
Display Module Heater
Main Board
Antenna In
Data Card Flex
Left Data Card
Right Data Card
LCD Flex
Interface Board
Main Board
Data Card Flex
Data Card Flex
MAIN BOARD CONNECTORS
B.3.1 J1
Table B-3. J1 Descriptions
Pin Name
VLOC ANNUNCIATE
GPS ANNUNCIATE
WAYPOINT ANNUNCIATE
TERMINAL ANNUNCIATE (ANNUNCIATOR A)
APPROACH ANNUNCIATE (ANNUNCIATOR B)
MESSAGE ANNUNCIATE
OBS ANNUNCIATE
AUTO ANNUNCIATE
INTEGRITY ANNUNCIATE (ANNUNCIATOR C)
ANNUNCIATOR D
ANNUNCIATOR E
ALTITUDE ALARM ANNUNCIATE
ANNUNCIATOR F
ILS/GPS APPROACH
RESERVED
TIME MARK OUT
MAIN LATERAL SUPERFLAG
MAIN VERTICAL SUPERFLAG
AIRCRAFT POWER
Page B-2
Rev. C
Pin #
I/O
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
O
O
O
O
O
O
O
O
O
O
O
O
O
O
NA
O
O
O
I
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table B-3. J1 Descriptions (continued)
AIRCRAFT POWER
MAIN +LEFT
MAIN +RIGHT (2.5V Common)
MAIN LATERAL +FLAG
MAIN LATERAL -FLAG (2.5V Common)
MAIN +TO
MAIN +FROM (2.5V Common)
MAIN +UP
MAIN +DOWN (2.5V Common )
MAIN VERTICAL +FLAG
MAIN VERTICAL -FLAG (2.5V Common)
MAIN OBS ROTOR C
MAIN OBS ROTOR H (Ground)
MAIN OBS STATOR D
MAIN OBS STATOR E (2.5V Common OBS)
MAIN OBS STATOR F
MAIN OBS STATOR G (2.5V Common OBS)
ALTITUDE ALARM AUDIO HI
ALTITUDE ALARM AUDIO LO (Ground)
LIGHTING BUSS HI
LIGHTING BUSS LO
GPS RS232 OUT3
GPS RS232 IN3
MAIN OBI CLOCK
MAIN OBI DATA
MAIN OBI SYNC
GPS ARINC 429 OUT A
GPS ARINC 429 OUT B
GPS ARINC 429 IN1 A
GPS ARINC 429 IN1 B
GPS ARINC 429 IN2 A
GPS ARINC 429 IN2 B
RESERVED
RESERVED
GPS RS232 OUT4
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
I
O
O
O
O
O
O
O
O
O
O
O
O
I
O
I
O
O
I
I
I
O
I
O
O
O
O
O
I
I
I
I
I
Page B-3
Rev. C
Table B-3. J1 Descriptions (continued)
GPS RS232 IN4
GPS RS232 OUT1
GPS RS232 IN1
GPS RS232 OUT2
GPS RS232 IN2
ALTITUDE COMMON (Ground)
ALTITUDE C4
ALTITUDE C2
ALTITUDE C1
ALTITUDE B4
ALTITUDE B2
ALTITUDE B1
ALTITUDE A4
ALTITUDE A2
ALTITUDE A1
ALTITUDE D4
OBS MODE SELECT
SPARE INPUT B
CDI SOURCE SELECT
SPARE INPUT A
DEMO MODE SELECT
TEST MODE SELECT
GROUND
GROUND
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
I
O
I
O
I
O
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
I
O
O
B.3.2 J8
Table B-4. J8 Descriptions
Pin Name
VCC
VCC
GND
33MHZ
GND
IF
RSSI
TRAP
Page B-4
Rev. C
Pin #
I/O
1
2
3
4
5
6
7
8
O
O
O
I
O
I
I
O
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
B.3.3 J9
Table B-5. J9 Descriptions
Pin Name
Pin #
I/O
Description
12V
5V_NAV
GND
-12V
VLOC_SERIAL_IN
1
2
3
4
5
O
O
O
O
O
12 volt Supply to NAV board and G/S board from Main CPU board.
+5 volt Supply to NAV board and G/S board from Main CPU board.
Ground.
-12 volt Supply to NAV board and G/S board from Main CPU board.
Serial output used to communicate with the processor on the NAV
board.
KEY
G/S_SERIAL_IN
6
7
O
G/S_SERIAL_OUT
NAV_VOL_CONTROL
8
9
I
O
VLOC_SERIAL_OUT
10
I
Serial output used to communicate with the processor on the G/S
board.
Serial input used to communicate with the processor on G/S board.
This is a dc output that is connected to the center tap of a pot. See
J14-41 (POT_BOT_WPR).
Serial input used to communicate with the processor on NAV board.
B.3.4 J11
Table B-6. J11 Descriptions
Pin Name
Pin #
I/O
12V_COM
-12V_COM
5V_COM
COM_SERIAL_IN
COM_SERIAL_OUT
COM_VOL_CONTROL
1
2
3
4
5
6
O
O
O
O
I
O
12 volt Supply to COM board from Main CPU board.
-12 volt Supply to COM board from Main CPU board.
+5 volt Supply to COM board from Main CPU board.
Serial output used to communicate with the COM board.
Serial input used to communicate with the COM board.
This is a dc output that is connected to the center tap of the
volume pot. See J14-70 (POT_TOP_WPR).
Not used.
Not used.
GND
GND
7
8
9
10
O
O
Ground.
Ground.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Description
Page B-5
Rev. C
B.3.5 J12
Table B-7. J12 Descriptions
Pin Name
Pin #
I/O
O
LOWER half display DATA output.
CLK_ROW
46-50
3-5
6
O
CLK_SHIFT
7
O
FLM
8
O
LCD_OFFN
T1
9
10
O
I
T2
11
I
Pulse high for typically 310 ns at a period of 33.236 us
(30.088 kHz). This line loads the next row of data in the
display drivers. There are 66 CLK_ROW pulses for each
FLM pulse.
Pulse high for a typical 120 or 180 ns. Pulses come in bursts
of 90 with about 180 ns of low time between each. The
bursts of 90 come at the CLK_ROW frequency. The rising
edge of the first pulse in a burst of 90 is about 1.22 us after
the rising edge of a CLK_ROW pulse.
First Line Marker that pulses high for 33.236 us (30.088
kHz) at period of 2.19359 ms (455.873 Hz). The rising edge
of FLM is about 1.1 us after the rising edge of a CLK_ROW
pulse.
LCD OFF Not is a output that turns off the display if low.
Thermistor 1 input is used to measure LCD temperature.
Resistance of input is 10 k ohm to VCC.
Thermistor 1 input is used to measure heater temperature.
Resistance of input is 2.2 k ohm to VCC.
12
13
14
15,
30..37,65
66..70
16
O
O
O
55
20
54
19
53
18
52
17
21
22
23
24
O
O
O
O
I
I
I
I
O
LD1 through LD8
VCC
LCD_HV
GND
SPARE
BEZEL_TEMP
PB_OUT_A
PB_OUT_B
PB_OUT_C
PB_OUT_D
PB_IN_A
PB_IN_B
PB_IN_C
PB_IN_D
GND
NOT USED
NOT USED
NOT USED
Page B-6
Rev. C
I
Description
LCD contrast voltage.
Ground.
Bezel temperature is used by the board to measure
temperature.
Push Button Matrix.
Ground.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table B-7. J12 Descriptions (continued)
NOT USED
ROT_R_LRGA
ROT_R_LRGB
ROT_R_LRGC
ROT_R_SMLA
ROT_R_SMLB
ROT_R_SMLC
GND
ROT_R_SW
UD1..UD8
PHOTOCELL
25
64
26
27
61
62
63
28
29
38..45
51
I
I
I
I
I
I
O
I
O
I
56
57
58
59
60
O
O
O
O
5V_MISC
NOT USED
NOT USED
NOT USED
LED_COMMON
Rotor Right Large A to C are the contacts of a single pole
triple throw switch. The common of the switch is ground.
Only one of the 3 is low at a time.
Rotor Right Small A to C are the contacts of a single pole
triple throw switch. The common of the switch is ground.
Only one of the 3 is low at a time.
Ground.
Push switch on right rotary. Active low input.
UPPER half display DATA output.
Photocell input is used to by the board to measure light
level. Photocells are resistive loads that change with
ambient light level.
Led common is a 4 kHz PWM output that controls bezel key
and nomenclature backlighting. The longer this signal is
low the brighter the LEDs will be.
B.3.6 J14
Table B-8. J14 Descriptions
Pin #
Pin Name
I/O
Description
1
2
40
3..22
23
ROT_L_LRGC
ROT_L_LRGB
ROT_L_LRGA
CARD_A01..A20
CARD_RDN
I
Rotor Left Large A to C are the contacts of a single pole triple
throw switch. The common of the switch is ground. Only one of
the 3 is low at a time.
O
O
24
CARD_WRN
O
25..32
CARD_DL0..7
B1
33
34
POT_TOP_SW
PWR_ON_2
I
I
35
POT_TOP_PWR
O
Card Address 01 to 20.
Card Read Not. Output pulses low typically for 150 ns or 210 ns
depending on the number of wait states when cards are accessed.
Card Write Not. Output pulses low typically for 180 ns when
cards are accessed.
Card Data Left Bit 0 .. 7. These pins float except during card
accesses.
Push switch on top pot. Active low input.
Power on number 2 contact. Powers unit on when connected to
PWR_ON_1.
Provides Power to top pot.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page B-7
Rev. C
Table B-8. J14 Descriptions (continued)
36
37
38
39
41
42
43
44
45
46
ROT_L_SMLC
ROT_L_SMLB
ROT_L_SMLA
ROT_L_SW
POT_BOT_WPR
CARD_A21
GND
VCC
CARD_A22
LFT_A22
I
I
I
I
I
O
O
O
O
47
48
49
50
51
CARD_CSR3N
CARD_CSR2N
CARD_CSR1N
CARD_CSR0N
CARD_DET_RGTN
O
52
CARD_DET_LFTN
I
53
54
55
56
57
58
59
60..67
GND
VCC
12V_REG
CARD_CSL3N
CARD_CSL2N
CARD_CSL1N
CARD_CSL0N
CARD_DR7..0
O
O
O
O
68
69
POT_BOT_SW
PWR_ON_1
I
O
70
POT_TOP_WRP
I
Page B-8
Rev. C
I
B1
Rotor Left Small A to C are the contacts of a single pole triple
throw switch. The common of the switch is ground. Only one of
the 3 is low at a time.
Push switch on left rotary. Active low input.
Bottom Pot Wiper.
Card Address 21.
Ground.
Card Address 22.
Configured for a test mode enable input from the left data card.
This input is type I and allows a special down load board that fits
into the left slot to put the unit in test mode which then allows
writing to the flash. An alternate use of this pin is Address 22 for
the left data card. This may be used in the future to allow for card
size expansion. If in this mode the pin is type O.
Card chips select right 3 ..0 not. Outputs pulses low typically for
200 or 260, depending on wait states, when cards are accessed.
Only one should be low at a time.
Card detect right not. Active low input. Insertion of a data card
causes this input to be low.
Card detect left not. Active low input. Insertion of a data card
causes this input to be low.
Ground.
Regulated 12 V output.
Card chips select left 3 ..0 not. Outputs pulses low typically for
200 or 260, depending on wait states, when cards are accessed.
Only one should be low at a time.
Card Data Right Bit 7..0. These pins float except during card
accesses.
Push switch on bottom pot. Active low input.
Power on number 1 contact. This input is connected to
AIRCRAFT POWER through approximately 3000 ohms. Powers
unit on when connected to PWR_ON_2.
Top Pot Wiper. The source is the wiper of a 10 K ohm pot
connected to VCC and GND.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
B.3.7 J16
Table B-9. J16 Descriptions
Pin Name
Pin #
I/O
Description
CS_MAPN
1
O
RDN
2
O
WRN
3
O
4..7
O
Chip Select Map Not. Output pulses low typically for 240 ns when
map is accessed.
Read Not. Output pulses low for typical times of 90, 150, and 210
ns, depending on wait states.
Write Not. Output pulses low for typical times of 60, 120, and 180 ns,
depending on wait states.
Card Chip Select Right 0..3, not and Map Chip Select 0..3. Signal
used for both card chips (only 1 should be low at a time) and selecting
map.
8, 10, 54
9
11..26
27..39
40..49
O
B1
O
O
CCSL0N_MA24.
.
CCSL3N_MA27
12V_REG
VCC
GND
M_CFG3..M_CF
G0
WR_TESTN
50..53
O
55
56
57
58..61
O
O
O
I
62
O
SPARE
HSBUS_A,
HSBUS_B
UXLA01
HSBUS_RESET
N
63..66
67, 68
I/O
69
70
O
O
CCSR0N_MCS0
N..
CCSR3N_MCS3
N
SPARE
RESETN
D00 to D15
A01..A13
CMA14..CMA23
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Reset Not output. Low when resetting.
Data I/O.
Address 01.. 13 output.
Card and Map Address output. Used for both addressing map and
card data.
Card Chip Select Left 0..3 not and Map Address 24..27. Used for
chip selects of left card (only 1 of 4 should be low at a time) and
addressing map data.
12 V dc +/- 5% output.
Ground.
Map Configuration Input 3..0.
Write Test Not. Output pulses low for typical times of 60, 120, and
180 ns, depending on wait states and only if the J1-76 (TEST MODE
SELECT) is low. Also see J14-46 (LFT_A22)
Not used.
Uart, Xilinx, LCD Address 1.
Not used.
Page B-9
Rev. C
B.3.8 J17
Table B-10. J17 Descriptions
Pin Name
FAN_HI
FAN_LO
Pin #
I/O
1
2
O
O
Description
Approx. 5 V.
Used to switch fan off and on.
B.3.9 P13
Table B-11. P13 Descriptions
Pin Name
Pin #
I/O
Description
12V
CCFT_TA_NOT
1
2
O
O
CCFT_TB_NOT
3
O
CCFT_CURRE
NT
4
I
HEATER_ON
5
O
12 V dc output.
Cold Cathode Transmit A Not logic level output. Occurs at 58.5 kHz
and is active low. This signal is capacitor coupled on the inverter.
Cold Cathode Transmit B Not logic level output. Occurs at 58.5 kHz
and is active low. This signal is capacitor coupled on the inverter.
Cold Cathode Fluorescent Tube Current in an input used to measure
the amount of current leaving the tubes. Toggles from a DC resistance
of 100 K ohm to -12 VDC to an AC resistance of 10 Kohm. The AC
resistance mode is used to sample when the CCFT is on and is used to
sample the current level. The impedance level toggles at a rate of
71.13 Hz and the duty cycle is proportional to CCFT duty cycle.
Heater on that when high enables the heater. This signal is capacitor
coupled on the inverter. The signal is either: low (heater off), duty
cycle of 12.5% hi (heater on for 27.5 VDC AIRCRAFT POWER) or
duty cycle of 50% hi (heater on for 13.8 VDC AIRCRAFT POWER).
5V_MISC
GND
INVTR_ON
BULB_ON_STA
RT
INV_V_CTRL
6
7
8
9
O
O
O
O
10
O
PWR_INVTR
11
O
PWR_HTR
12
O
Page B-10
Rev. C
Ground.
Inverter On output that when high enables the inverter flyback supply.
Not used.
Inverter Voltage control analog output ranges from 0 to 5 volts. This
signal controls the voltage output of the inverter flyback.
Inverter Power provides fused AIRCRAFT POWER to the inverter
flyback.
Heater power provides fused AIRCRAFT POWER to the heater found
on the inverter.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
B.4
COM BOARD CONNECTORS
B.4.1 J2
Table B-12. J2 Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Name
RESERVED
COM IF AGC TEST
SQUELCH / COMPRESSOR
TEST
COM MIC KEY
INTERCOM MIC HI
COM MIC AUDIO HI
500 : COM AUDIO HI
RESERVED
RESERVED
RESERVED
AIRCRAFT POWER
AIRCRAFT POWER
RESERVED
TRANSMIT INTERLOCK
COM REMOTE TRANSFER
SPARE
INTERCOM MIC LO
COM MIC AUDIO LO
500 : COM AUDIO LO
COM AUDIO IN LO
AIRCRAFT GROUND
AIRCRAFT GROUND
RESERVED
RESERVED
RESERVED
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
I/O
O
I
I
I
I
O
I
I
I
I
I
O
I
I
I
I
O
I
I
I
I
I
O
Page B-11
Rev. C
B.4.2 J26
Table B-13. J26 Descriptions
Pin #
Pin Name
I/O
1
2
3
4
5
6
+12 VDC
-12 VDC
+5 VDC
SERIAL_IN
SERIAL_OUT
DC_VOL_CONT
I
I
I
I
O
I
7
8
9
10
SPARE
SPARE
GND
GND
I
I
B.5
Description
Asynchronous serial input.
Asynchronous serial output.
High impedance A/D input. In the unit it is fed by the center tap of a 20K
pot connected between +5V and Gnd.
Spare.
Spare.
Ground.
Ground.
NAV BOARD CONNECTORS
B.5.1 J6
Table B-14. J6 Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Page B-12
Rev. C
Pin Name
I/O
VOR/LOC +TO
VOR/LOC +FROM (COMMON)
VOR/LOC +FLAG
VOR/LOC –FLAG (COMMON)
VOR/LOC +LEFT
VOR/LOC +RIGHT (COMMON)
VOR/LOC IF AGC
VOR/LOC COMPOSITE OUT
VOR OBS ROTOR C
VOR OBS ROTOR H (GND)
VOR OBS STATOR E/G (VOR/LOC
COMMON)
VOR OBS STATOR F
VOR OBS STATOR D
PARALLEL DME - 8 MHZ
VOR/LOC SUPER FLAG OUT
O
O
O
O
O
O
O
O
O
O
I
I
I
O
O
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Table B-14. J6 Descriptions (continued)
16
500 : VOR/ILS AUDIO HI
O
17
500 : VOR/ILS AUDIO LO (GND)
SERIAL DME CLOCK
SERIAL DME DATA
SER DME - CHAN REQ /PAR DME 4MHZ
SER DME - RNAV MODE /PAR DME 2MHZ
VOR/ILS DME COMMON
VOR/ILS 429 OUTB
VOR/ILS 429 OUTA
VOR OBI CLOCK
VOR OBI SYNC
VOR OBI DATA
VLOC REMOTE TRANSFER
ILS ENERGIZE
GLIDESLOPE +FLAG
GLIDESLOPE -FLAG /+DOWN
(GLIDESLOPE COMMON)
GLIDESLOPE +UP
PARALLEL DME - 1MHZ
GLIDESLOPE IF AGC
VOR/ILS 429 INB
VOR/ILS 429 INA
PARALLEL DME – 800KHZ
GLIDESLOPE SUPER FLAG OUT
PARALLEL DME - 400KHZ
PARALLEL DME - 200KHZ
AIRCRAFT GROUND
PARALLEL DME - 100KHZ
PARALLEL DME - 50KHZ
AIRCRAFT POWER
O
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
O
O
I/O
I/O
I
O
O
O
O
O
I
O
O
O
O
O
O
I
I
O
O
O
O
O
O
I
Page B-13
Rev. C
B.5.2 J10
Table B-15. J10 Descriptions
Pin #
Pin Name
I/O
1
2
3
4
5
6
7
8
+12VDC
+5VDC
GND
-12VDC
VLOC SERIAL IN
KEY
G/S SERIAL IN
G/S SERIAL OUT
I
I
I
I
I
I
O
9
NAV VOL
CONTROL
VLOC SERIAL
OUT
I
10
O
Description
Serial input from the Main CPU board to the NAV Board.
This pin is not used.
Serial input from the Main CPU board to the G/S board.
This is an asynchronous serial output from the G/S board to the Main CPU
board.
This is a dc input in the range between 0 and 5 volts coming through the
Main CPU board from the NAV volume control pot mounted on the bezel.
This is a asynchronous serial output to the Main CPU board from the NAV
Board.
B.5.3 J24
Table B-16. J24 Descriptions
Pin #
Pin Name
I/O
1
2
3
4
5
6
7
8
9
10
11
+12VDC
+5VDC
GND
-12VDC
G/S IF AGC
NOT USED
G/S SERIAL IN
G/S SERIAL OUT
G/S + FLAG
G/S + UP
G/S [COMMON]
G/S
SUPER FLAG
OUT
KEY
G/S RF AGC
SPARE
KEY
O
O
O
O
I
I
O
I
I
I
I
12
13
14
15
16
Page B-14
Rev. C
I
I
-
Description
Ground.
Glideslope board IF AGC output.
Serial output to the G/S board from Main Board.
Serial input from the G/S board to the Main Board
Input from the G/S board.
Input from the G/S board.
The G/S board COMMON, or G/S -, input. Reference for the G/S + UP and
G/S + FLAG.
G/S board superflag input. (Output on the G/S board is an open collector
output. The G/S superflag will be active (low) when the flag is out of view.)
Not Used.
SPARE
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
B.6
GLIDESLOPE BOARD CONNECTORS
B.6.1 J25
Table B-17. J25 Descriptions
Pin #
Pin Name
I/O
1
2
3
4
5
6
7
8
9
10
11
12
+12VDC
+5VDC
GND
-12VDC
G/S IF AGC
G/S Composite
G/S SERIAL_IN
G/S SERIAL_OUT
G/S + FLAG
G/S + UP
G/S -[COMMON]
GS SUPERFLAG
OUT
KEY
RF AGC
SPARE
KEY
I
I
I
I
O
O
I
O
O
O
O
O
13
14
15
16
B.7
O
DESCRIPTION
Ground.
The IF AGC output. 10K output impedance.
Not Used.
Serial input from Main Board.
Serial output from G/S Board to Main Board.
This output indicates whether course deviation is valid or not.
This is the vertical course deviation output for the G/S.
Reference for G/S + UP and G/S + FLAG outputs.
G/S superflag output is an open collector output. The G/S superflag will be
active (low) when the flag is out of view.
Polarization Pin
Not Used
SPARE
Polarization Pin
KEYBOARD CONNECTORS
B.7.1 J23
See description of LCD Flex (J12).
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page B-15
Rev. C
B.8
INVERTER BOARD CONNECTORS
B.8.1 J13
Table B-18. J13 Description
Pin #
Pin Name
I/O
1
2
12V
CCFT_TA_NOT
I
I
3
CCFT_TB_NOT
I
4
CCFT_CURRENT
O
5
HEATER_ON
I
6
7
8
VCC
GND
INVTR_ON
I
I
I
9
10
Not used.
INV_V_CTRL
I
I
11
PWR_INVTR
I
12
PWR_HTR
I
Description
11 to 14 V dc.
Cold Cathode Transmit A Not input. Occurs at 58.5 kHz
and is active low. Inverter is capacitor coupled.
Cold Cathode Transmit B Not input. Occurs at 58.5 kHz
and is active low. Inverter is capacitor coupled.
Cold Cathode Fluorescent Tube Current is an output used
to measure the amount of current leaving the tubes.
Output is a half - wave rectified wave form of a 58.5 kHz
current source with a 1 k ohm in parallel.
Heater On Input that when high enables the heater.
Heater is capacitor coupled.
Ground.
Inverter On input that when high enables the inverter flyback supply. Invertor on if Vin > 4.5 V and Invertor off if
Vin < 0.4 V.
Not used.
Inverter Voltage control analog input. Valid ranges from 0
to 5 volts.
Inverter Power provides fused power to the inverter
flyback.
Heater power provides fused power to the heater.
B.8.2 J26
Table B-19. J26 Description
Pin #
Pin Name
1
2
3
D
Not used.
C
4
5
6
7
Page B-16
Rev. C
I/O
Description
O
Bulb cathode.
I
Bulb cathode. (May not be used if single bulb 463-00003-00 is
used.)
Not used.
B
O
Bulb cathode. (May not be used if single bulb 463-00003-00 is
used.)
Not used.
A
I
Bulb cathode.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
B.8.3 J27
Table B-20. J27 Description
Pin #
Pin Name
1
2
B.9
I/O
HEATER VIN
HEATER GND
O
I
DESCRIPTION
Heater high. The heater typical resistance is 16 ohms.
Heater low.
GPS MODULE CONNECTORS
B.9.1 J101
Table B-21. J101 Descriptions
Pin #
Pin
Name
I/O
TRAP
RSSI
1
2
I
O
BASEB
AND
GND
CLK32
GND
VCC
RSFW
3
O
4
5
6
7
8
0
O
O
I
I
DESCRIPTION
0 to 12 V dc 4 Khz PWM output used to position the GPS notch.
Relative Signal Strength Indicator input used to position GPS notch via the
TRAP output. Input impedance: AC > 1 K ohm.
33 MHz clock.
Ground.
Logic high enables all power regulators.
B. 10 INTERFACE BOARD CONNECTORS
B.10.1 J19
See Data Card Flex description (J14).
B.10.2 J20
J20 is the Left Data Card Connector.
B.10.3 J21
J21 is the Right data Card Connector.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05
Page B-17
Rev. C
B.11
DISPLAY MODULE CONNECTORS
B.11.1 J22
See LCD Flex description (J12).
B.12
DATA BASE CARD CONNECTORS
J20 and J21 are the Data Base Card Connectors.
B.13
MAP BOARD CONNECTORS
B.13.1 P16
Table B-22. P16 Descriptions
Pin Name
Pin #
I/O
DESCRIPTION
CS_MAPN
1
O
RDN
2
O
WRN
3
O
4..7
O
Chip Select Map Not. Output pulses low typically for 240 ns when
map is accessed.
Read Not. Output pulses low for typical times of 90, 150, and 210
ns, depending on wait states.
Write Not. Output pulses low for typical times of 60, 120, and 180 ns,
depending on wait states.
Card Chip Select Right 0..3 not and Map Chip Select 0..3. Signal
used for both card chips (only 1 should be low at a time) and selecting
map.
8, 10, 54
9
11..26
27..39
40..49
O
B1
O
O
CCSL0N_MA24..
CCSL3N_MA27
50..53
O
12V_REG
VCC
GND
M_CFG3..M_CFG
0
WR_TESTN
55
56
57
58..61
O
O
O
I
62
O
SPARE
HSBUS_A,
HSBUS_B
UXLA01
HSBUS_RESETN
63..66
67, 68
I/O
69
70
O
O
CCSR0N_MCS0N
..
CCSR3N_MCS3N
SPARE
RESETN
D00 to D15
A01..A13
CMA14..CMA23
Page B-18
Rev. C
Reset Not output. Low when resetting.
Data I/O.
Address 01.. 13 output.
Card and Map Address output. Used for both addressing map and
card data.
Card Chip Select Left 0..3 not and Map Address 24..27. Used for
chip selects of left card (only 1 of 4 should be low at a time) and
addressing map data.
12 V dc +/- 5% output.
Ground.
Map Configuration Input 3..0.
Write Test Not. Output pulses low for typical times of 60, 120, and
180 ns, depending on wait states and only if the J1-76 (TEST MODE
SELECT) is low. Also see J14-46 (LFT_A22).
Not used.
Uart, Xilinx, LCD Address 1.
Not used.
400 SERIES MAINTENANCE MANUAL
P/N 190-00140-05