Garmin MX20 Installation Manual - page 74
Troubleshooting
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560-1025-09 Rev E
MX20 Installation Manual
5.2 Integration Troubleshooting Procedure
Use this procedure to check the integration of external data sources with the MX20.
1. Remove power to all external data sources and power on just the MX20.
2. Verify the correct power up sequence and access to the different functions of the MX20.
3. Verify that amber data flags are presented and own-ship is ‘X’d, indicating that external data sources are
not available. Allow the system to operate for several minutes to verify correct basic operation.
4. Apply power to each external data source one at a time. Verify that the corresponding amber data flag
extinguishes with each data source.
5. Verify that system operates correctly with the new data source by switching between different functions
and allowing the system to operate for several minutes. Repeat with the next data source. Note that the
external GPS may need to acquire and set a destination waypoint before the ALT, POS, and RTE
flags clear.
6. If a given external data source causes a system error, verify compatibility and wiring. Re-verify port
assignments.
5.3 Contacting the Factory for Assistance
If the MX20 fails to operate despite troubleshooting efforts, contact Customer Service for assistance.
GARMIN International, Inc.
1200 East 151
st
Street
Olathe, KS 66062-3426
USA
Phone: 913 397 8200
FAX: 913 397 8282
http://www.garmin.com
Be prepared to offer the following information about the installation:
Installation configuration (accessories, antenna, ...)
Model number, part number with mod levels, and serial number
Software version
Description of problem
Efforts made to isolate the problem