Page 6-32 GTN 625/635/650 TSO Installation ManualRev. C 190-01004-026.10 Ground Checks (Configuration Mode)The following checks are done in Configuration Mode. For instructions concerning enteringConfiguration Mode, see Section 6.4.6.10.1 Main Indicator Check (Analog Only)NOTEIf the GTN is interfaced to an electronic HSI and the main indicator analog output is notused, this check is not required.If the GTN is interfaced to an analog indicator on the mainCDI/OBS, perform the following steps:1. Access the Main Indicator (Analog) Diagnosticspage, as shown in Figure 6-37 by touching the‗Main Indicator (Analog)‘ key on the GTNDiagnostics page.2. Verify correct operation of the lateral deviation,flag and TO/FROM flag using the correspondingselections.3. Verify correct operation of the vertical deviationand flag using the corresponding selections.4. Verify correct operation of the OBS knob using the SELECTED COURSE display. At 30°increments around the OBS card, ensure that the indicated value is within 2° of the value set onthe indicator. If the resolver is not within 2°, calibrate the resolver as described in Section 6.6.5.6.10.2 VOR/ILS Indicator (Analog) DiagnosticsIf the GTN is interfaced to an analog indicator on theVOR/ILS Indicator output, perform the following steps:1. Access the VOR/ILS Indicator (Analog)Diagnostics page, as shown in Figure 6-38, bytouching the ‗VOR/ILS (Analog)‘ key on theGTN Diagnostics page.2. Verify correct operation of the lateral deviation,flag and TO/FROM flag using the correspondingselections.3. Verify correct operation of the vertical deviationand flag using the corresponding selections.4. Verify correct operation of the OBS knob using the SELECTED COURSE display. At 30°increments around the OBS card, ensure that the indicated value is within 2° of the value set onthe indicator. If the resolver is not within 2°, calibrate the resolver as described in Section 6.6.11.Figure 6-37. Main Indicator (Analog)Diagnostics PageFigure 6-38. VOR/ILS Indicator (Analog)Diagnostics Page
