Post Installation Configuration And Checkout; System Configuration Overview; Mounting, Wiring, And Power Checks; Connector Engagement Check - Garmin GTX 3x5 Series Installation Manual

6 POST INSTALLATION CONFIGURATION AND CHECKOUT

6.1 System Configuration Overview

Checkout and configuration instruction for the GTX 3x5 is provided in this section.
• Perform the installation checks
• Configure the GTX 3x5 for the specific installation
• Perform ground checks to verify interfaces to external equipment
• Perform the specified flight checks

6.2 Mounting, Wiring, and Power Checks

Verify that all cables are properly secured and shields are connected to the shield block of the connectors.
Check the movement of the flight and engine controls to verify there is no interference between cabling
and control systems. Ensure that all wiring is installed as described in section _____.
Prior to installing and powering up the GTX 3x5, the wiring harness must be checked for proper
connections to the aircraft systems and other avionics equipment. Point to point continuity must be
checked to expose any faults such as shorting to ground or wiring discrepancies. All faults or
discrepancies must be corrected before proceeding.
After installing the GTX 3x5 or completing a continuity check, perform power and ground checks to verify
proper power distribution to the GTX 3x5. All faults are discrepancies should be corrected at this time.
The GTX 3x5 can be installed after completion of the continuity and power checks. The GTX 3x5 should
be installed in the rack and secured appropriately. See Appendix A for applicable drawings.

6.3 Connector Engagement Check

Check the connector engagement prior to configuration and checkout of the GTX 3x5.
1. Turn on the avionics master switch (if installed).
2. Place the GTX 3x5 in the rack and engage the cam mechanism.
3. Turn the Allen screw of the locking cam (located on the lower left side of the unit) slowly
clockwise until the unit just powers on. A T-handle can be used for this, but ensure that the screw
is not over-tightened.
4. Count the number of complete revolutions the Allen screw can be turned until it cannot turn any
more.
Do not over-tighten. Three turns is the minimum for proper installation. If fewer than three turns are
possible, the mounting rack should be moved aft (toward the pilot) such that the aircraft panel does not
obstruct the unit from properly engaging in the rack.

6.4 Configuration Setup

The GTX 3x5 configuration menu is used configure the settings and interfaces, such as serial port
connections, for each specific installation. The configuration settings are stored in internal memory as well
as the external configuration module if connected. The optional pressure sensor also serves as a
configuration module.
The GTX 3x5 panel mount units include a configuration mode using the front panel controls and display.
To access the configuration mode, with the unit turned off, press and hold the ENT key and turn the unit
power on. To exit the configuration mode, turn the power off.
The GTX 3x5R remote units can be configured using the USB interface and a configuration program
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GTX 3x5 TSO Installation Manual
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