Grs/Gmu Software Installation And Testing; Marker Beacon Symbology - Garmin G1000 Maintenance Manual

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3. Close the circuit breaker to continue testing.
Marker Beacon Test
Figure 7-6. Marker Beacon Symbology
Using a ramp tester, simulate the outer marker, middle marker and inner marker signals by
following the test equipment manufacturer's instructions. Verify that each marker audio signal is
present over the headphones and speaker. Verify that the outer, middle, and inner
annunciations appear on the PFD when the corresponding signal is applied. Marker beacon
annunciations appear at the upper left corner of the altitude indicator on the PFD as shown in
Figure 7-6. Operate the MKR MUTE key on the GMA and ensure that the audio signal is
muted.
7.5

GRS/GMU SOFTWARE INSTALLATION AND TESTING

Original GRS is Reinstalled:
If the original GRS is reinstalled, no software loading is required. This does not include units
that were returned for repair as their software and configuration files are deleted during the
repair testing process.
New, Repaired or Exchanged GRS is Installed:
If a new, repaired or exchange GRS is installed; load the file listed below after removing the
supplemental database cards from the bottom slots of each display. Note which card was
removed from the MFD so it may be identified later for reinsertion in the MFD when software
and configuration loading is complete. It contains a FliteChart or ChartView database which is
only used by the MFD. Reinstall all the cards after the software and configuration file loads are
complete.
•
GRS Software
New GRS Configuration Module is Installed:
If the GRS 77 configuration module was replaced, no software loading is required.
Original GMU is Reinstalled:
If the original GMU is reinstalled, no software loading is required. This does not include units
that were returned for repair as their software and configuration files are deleted during the
repair testing process.
New, Repaired or Exchanged GMU is Installed:
If a new, repaired or exchange GMU is installed; load the file listed below after removing the
Supplemental Database cards from the bottom slots of each display. Note which card was
Page 7-14 G1000 System Maintenance Manual
Rev. B 190-00907-00