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Page ii
GNS 400W Series Maintenance Manual
Rev. A
190-00356-05
RECORD OF REVISIONS
Revision
Date
Section
Page
Description
A 10/2/08
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Initial
Release
DOCUMENT PAGINATION
Section
Pages
Table of Contents
i-vi
Section 1
1-1 to 1-2
Section 2
2-1 to 2-10
Section 3
3-1 to 3-6
Section 4
4-1 to 4-58
Section 5
5-1 to 5-18
Section 6
6-1 to 6-4
Appendix A
A-1 to A-8
SERVICE BULLETIN HISTORY
The following table identifies hardware service bulletins for the GNS 400W series of units. The
table below 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 changes are listed with the associated service bulletin number, service
bulletin date, and the purpose of the bulletin in the table below.
Bulletin #
Date of Publication
Name/Summary/MOD Level
740
11/29/07
400W Series Unit’s software upgrade to Main
Software version 3.00 & GPS. There was no mod
level change associated with this upgrade.
628
1/17/08
NAV Software Version 5.02 for the GNS 430W
Series Units. There was no mod level change
associated with this upgrade.