Garmin G3X Installation Manual page 7

The following table identifies hardware modification (Mod) Levels for the GSU 73 LRU. 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.
SERVICE
MOD
BULLETIN
LEVEL
NUMBER
1 N/A
2 N/A
190-01115-01
Rev. L
GSU 73 HARDWARE MOD LEVEL HISTORY
SERVICE
BULLETIN
DATE
N/A Improved HSCM accuracy when using +28 V supply
Improved backup capacitor circuit to increase backup time
N/A
in certain under-voltage conditions
PURPOSE OF MODIFICATION
G3X Installation Manual
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