Gcu 476 Boot Block Upgrade - Garmin G1000 Maintenance Manual

The following softkeys provide an easy way to select files:
CHK ALL: Selects all files, both configuration and software
CHK SW: Selects all software files only.
CHK CFG: Selects all configuration files only.
CLR ALL: Clears all selections.
5. After verifying that the GCU keypad software and configuration files are checked, press the LOAD
softkey. It is acceptable to simply load the pre-selected software and config files. The G1000 system
automatically begins loading software and default configuration files to the selected LRUs in the
proper order.
6. When the system finishes loading, it prompts the technician accordingly. Press the ENT key to
acknowledge that the upload is finished:
7. Verify that each column indicates
inspect the SUMMARY window as well to ensure that the load is successful.
8. After the software and configuration files are loaded, turn off the system and reinsert the
Supplemental Database Cards in the bottom slot of each display. Be sure to insert the card removed
from the MFD back into the MFD.

6.11.4 GCU 476 Boot Block Upgrade

The GCU 476 requires a boot block version of 3.01 or higher. If the configuration does not load it is an
indicator that boot block upgrade is required (GCUs with older dates of manufacture may not have this
version). If it was determined in one of the previous software loading procedures that the GCU 476 does
not have boot block version 3.01 or higher, follow this procedure to update the GCU 476's software boot
block.
It is critical for electrical power to remain on during the boot block update procedure.
Take steps to ensure that a 28 VDC ground power supply is properly connected and is not
disturbed during the update.
1. Obtain the required GCU 476 Boot Block loader card (SD Card,G1000,GCU476 BB v3.01 GPN 010-
00533-02) from Garmin.
2. If required, remove any loader card present in the top slot of the PFD. Insert the boot block loader
card into the top slot of the PFD.
3. On the PFD, press and hold the ENT key and apply system power to the G1000.
4. Press and hold the ENT key until the message "INITIALIZING SYSTEM" appears in the upper left
corner of the PFD.
5. Release the ENT key.
6. On the PFD, use the FMS knob to get to the System Upload page.
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Revision C
in green when the loading process has finished and
NOTE
G1000-Columbia 350/400 System Maintenance Manual
190-00577-03