Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 3-17
3.6.3.1 Shield Block Assembly Procedure
The parts for the connector and backshell assemblies for the GTN installation are listed in Table 3-8. The
parts for the connector and backshell assemblies for the GMA 35 installation are listed in Table 3-9.
Backshell connectors give the installer the ability to terminate shield grounds at the backshell housing
using the Shield Block ground kit. Table 3-8 and Table 3-9 list Garmin part numbers for the GTN and
GMA 35 D-sub connectors and the backshell assemblies.
The three tapped holes on the shield block above the GTN fan must not be used for grounding shield
terminal lugs on P1001. There is insufficient clearance between the fan case and the P1001 shield block to
allow these holes to be used for grounding shield terminal lugs. Refer to Section 3.6.4 for more
information. If the remaining three tapped holes on the shield block are unable to accommodate the shield
terminal lugs, the extra shields can be daisy chained to allow the shields to be grounded to the shield
block. A maximum of two shields can be daisy chained together. The daisy chaining method must only be
used if the three tapped holes are insufficient to ground the shields on P1001. See Figure 3-3 for the daisy
chaining method.
9
8
7
1
2X
2
3
4X
6
5X
Figure 3-2. Connector and Backshell Assembly