Bedienungsanleitung Garmin GTN 650 (Seite 93 von 412) (Englisch)

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190-01007-A3 GTN 6XX/7XX AML STC Installation Manual

Rev. 4 Page 3-13

3.6 Electrical Installation Procedure

3.6.1 Special Tools Required

A crimp tool meeting MIL specification M22520/2-01 and a positioner/locator are required to ensure

consistent, reliable crimp contact connections for the rear D-sub connectors. Refer to Table 2-14 for a list

of recommended crimp tools. A milliohm meter is required to check GTN and optional GMA 35

installation bonding to aircraft structure or instrument panel.

3.6.2 Wire Harness Buildup

The installation kit for the GTN and optional GMA 35 include connectors and crimp contacts. Use wire

specified in Section 2.3.2 for all connections. Make the crimp connections with a crimp tool as specified

in Table 2-14.

Refer to the interconnect diagrams in Appendix E and Appendix F for the appropriate connections. Use

22 or 24 AWG wire for all connections. For power and ground, use the wire gauge specified in the

interconnect drawing in Appendix E, then 22 AWG for the short length from the splice to the connector,

for high-density connectors only. Install the configuration module as described in Section 3.6.3.2. Once

the cable assemblies have been made, use anti-chafe tape and attach the backshell/connector to the rear of

the mounting unit. Route the wiring bundle as appropriate. Avoid sharp bends that may damage the wire

bundle.

Allow adequate space for installation of cables and connectors. The installer supplies and fabricates all of

the cables. See interconnect diagrams in Appendix E and Appendix F. Refer to Section 4 for connector

pinout information. All electrical connections to the GTN are made through the following connectors

provided by Garmin:

• J1001 Main – 78-pin high-density D-Subminiature connector (male)

• J1002 Main – 26-pin high-density D-Subminiature connector (male)

• J1003 COM – 44-pin high-density D-Subminiature connector (male) (GTN 635/650/750 only)

• J1004 NAV – 62-pin high-density D-Subminiature connector (male) (GTN 650/750 only)

• J1005 I/O – 62-pin high-density D-Subminiature connector (male) (GTN 7XX only)

All electrical connections to the GMA 35 are made through the following connectors provided by

Garmin:

• J3501 – 44-pin high-density D-Subminiature connector (male)

• J3502 – 44-pin high-density D-Subminiature connector (male)

Construct the wiring harness according to the information contained in this and the following sections.

Cable lengths will vary depending upon installation. Strip all wires going to the connectors 0.17”. Insert

the wire into the pin and crimp with one of the recommended (or equivalent) crimping tools. Insert the pin

into the connector housing location as specified by the interconnect drawing in Appendix E. Verify that

the pin is properly engaged into the connector by gently tugging on the wire. Route and secure the cable

runs from the GTN and GMA 35 away from sources of electrical noise.

Section 4 provides the pin-out information for the GTN as well as the GMA 35. Required connectors and

associated hardware are supplied with the connector kits.

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