190-01007-A1 System Maintenance Manual GTN 6XX/7XX Part 23 AML STCRev. 5 Page 7-17 EQUIPMENT CONFIGURATION AND TESTINGThis section provides procedures to be followed after an LRU is replaced. At the beginning of each LRUsection, instructions are given to guide the technician for various removal and replacement scenarios.These instructions define necessary procedures to be followed for situations in which original equipmentwas reinstalled as well as for situations in which new equipment (new serial number) is installed.7.1 GTN 6XX/7XXOriginal GTN 6XX/7XX ReinstalledIf the removed GTN is installed in its original position, no software loading or configuration settingchanges are required. This does not include units that were returned for repair as their software andconfiguration files are deleted during the repair testing progress. It is recommended to perform theconnector engagement check to ensure that the GTN is properly seated to the connectors.See Section 7.1.2.1.New, Repaired, or Exchanged GTN InstalledIf a new, repaired, or exchanged GTN is installed, the correct software must be loaded to the unit. Someconfiguration files must be set. See the summary in Table . Any enabled features such as TAWS-B orChartView will not need to be re-enabled if the configuration module was left in the aircraft.This section covers the necessary steps to configure and test a replacement GTN unit. The steps providedin this section are only applicable for replacement of an equivalent GTN unit (i.e. 750 for 750, 625 for 625etc.). If wiring updates are needed or the configuration module is being replaced simultaneously, refer tothe GTN 6XX/7XX AML STC Installation Manual P/N 190-01007-A3 for installation instructions.
