Garmin GTN6XX Benutzerhandbuch
190-01007-A1
System Maintenance Manual GTN 6XX/7XX Part 23 AML STC
Rev. 7
Page 6-20
Figure 6-11. TVS2 Assembly
6.9.2.1 TVS2 Assembly Polarity Check
Using a multimeter that is set to the diode mode, check conductivity across the entire TVS2 assembly. In
one direction, the meter should read open and in the other direction it should read 2.0 to 2.5 volts. When
installed in the aircraft, the TVS assembly should be oriented so that it does not normally conduct from
power to ground. The meter should indicate open when the red lead is attached to the power bus terminal
lug, and the black lead is attached to the ground terminal lug. The meter should indicate 2.0 to 2.5 volts
when the red lead is attached to the ground terminal lug, and the black lead is attached to the power bus
terminal lug.
Using a multimeter that is set to the diode mode, check conductivity across the entire TVS2 assembly. In
one direction, the meter should read open and in the other direction it should read 2.0 to 2.5 volts. When
installed in the aircraft, the TVS assembly should be oriented so that it does not normally conduct from
power to ground. The meter should indicate open when the red lead is attached to the power bus terminal
lug, and the black lead is attached to the ground terminal lug. The meter should indicate 2.0 to 2.5 volts
when the red lead is attached to the ground terminal lug, and the black lead is attached to the power bus
terminal lug.
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