GTN 625/635/650 TSO Installation Manual
190-01004-02
Page 6-52
Rev. F
6.10 Ground Checks (Configuration Mode)
The following checks are done in Configuration Mode. For instructions concerning entering Configuration
Mode, see Section 6.4.
6.10.1
Main Indicator Check (Analog Only)
NOTE
If the GTN is interfaced to an electronic HSI and the main indicator analog output is not
used, this check is not required.
If the GTN is interfaced to an analog indicator on
the main CDI/OBS, perform the following steps:
1. Access the Main Indicator (Analog) Diag-
nostics page, as shown in Figure 6-50 by
touching the ‘Main Indicator (Analog)’ key
on the GTN Diagnostics page.
2. Verify correct operation of the lateral devia-
tion, flag and TO/FROM flag using the cor-
responding selections.
3. Verify correct operation of the vertical
deviation and flag using the corresponding
selections.
4. Verify correct operation of the OBS knob using the SELECTED COURSE display. At 30° incre-
ments around the OBS card, ensure that the indicated value is within 2° of the value set on the indi-
cator. If the resolver is not within 2°, calibrate the resolver as described in Section 6.6.5.
6.10.2
VOR/ILS Indicator (Analog) Diagnostics
If the GTN is interfaced to an analog indicator
on the VOR/ILS Indicator output, perform the
following steps:
1. Access the VOR/ILS Indicator (Ana-
log) Diagnostics page, as shown in
Figure 6-51.
2. Verify correct operation of the lateral
deviation, flag and TO/FROM flag
using the corresponding selections.
3. Verify correct operation of the vertical
deviation and flag using the corre-
sponding selections.
4. Verify correct operation of the OBS knob using the SELECTED COURSE display. At 30° incre-
ments around the OBS card, ensure that the indicated value is within 2° of the value set on the indi-
cator. If the resolver is not within 2°, calibrate the resolver as described in Section 6.6.12.
Figure 6-50. Main Indicator (Analog)
Diagnostics Page
Figure 6-51. VOR/ILS Indicator (Analog)
Diagnostics Page
Summary of Contents for GTN 625
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