Garmin GTN 6 series Maintenance Manual - page 74

GTN 6XX/7XX Part 27 AML STC Maintenance Manual

190-01007-B1

Page 6-10

Rev. 1

6.3.5.2

Navigation Indicator Ground Checks (Configuration Mode)

6.3.5.2.1

Main Indicator Check (Analog Only)

NOTE

If the GTN is interfaced to an electronic HSI/EFIS and the main indicator analog output is 

not used, this check is not required.

NOTE

To verify if the indicator is interfaced with the GTN on the main connector (P1001), 

examine the response of the indicator during the GTN self test upon power-up. If the 

indicator responds according to the values described on the screen, then it is connected to 

the main connector.

If the GTN is interfaced to an analog indicator on the main connector (P1001), perform the following steps 

in configuration mode (Section 3.3):

1. From the configuration mode page (Figure 3-8), touch GTN Diagnostics key.

2. Touch the Main Indicator (Analog) key. 

3. Verify correct operation of the lateral deviation, flag and TO/FROM flag using the corresponding 

selections. 

4. Verify correct operation of the vertical deviation and flag using the corresponding selections. 

5. Verify correct operation of the OBS knob using the OBS Resolver Setting display. At 30° 

increments around the OBS card, ensure that the indicated value is within 2° of the value set on the 

indicator. If the resolver is not within 2°, calibrate the resolver as described in Section 6.3.5.1.2. 

6.3.5.2.2

VOR/LOC/GS Indicator

If the GTN is interfaced to an analog indicator on the VOR/ILS connector (P1004), perform the following 

steps:

1. From the configuration mode page (Figure 3-8), touch GTN Diagnostics key. 

2. Touch the VOR/ILS Indicator (Analog) key. 

3. Verify correct operation of the lateral deviation, flag and TO/FROM flag using the corresponding 

selections. 

4. Verify correct operation of the vertical deviation and flag using the corresponding selections.

5. 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 on the indicator. 

If the resolver is not within 2°, calibrate the resolver as described in Section . 

6.3.6

Transponder

1. For remote transponders, configure transponder per Section 6.3.6.1.

2. Perform interface check per Section 6.3.6.2.