Garmin GPS 750s Manual

The Garmin GPS 750s is a high-performance aviation GPS navigator featuring a large touchscreen display, integrated WAAS GPS/SBAS receiver, support for flight plan management, terrain and obstacle awareness, traffic information display, and compatibility with various aviation databases. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Large touchscreen display, WAAS GPS/SBAS receiver, Terrain Awareness and Warning System (TAWS), Traffic Information Service (TIS), Flight plan storage, Database compatibility.

Installation

Unpack and inspect contents. Ensure proper aircraft compatibility.

1. Mount unit: Install in approved aircraft location using mounting kit.
2. Connect power: Wire to aircraft 10-32 VDC power source per wiring diagram.
3. Connect antennas: Attach GPS antenna to designated connector.
4. Connect avionics: Interface with other systems via data ports as needed.
5. Secure all connections and test installation.

WARNING! Installation must be performed by qualified aviation technician. Ensure proper grounding and circuit protection.

First-Time Setup

Power on unit; follow initial configuration prompts.

1. Language selection: Choose interface language (default ENGLISH).
2. Units setup: Select preferred units (nautical miles, feet, etc.).
3. Database loading: Install current navigation database via SD card.
4. System configuration: Set up COM frequencies, transponder codes if integrated.
5. GPS initialization: Allow time for satellite acquisition (typically 2-5 minutes).

CAUTION! Ensure aircraft is stationary with clear sky view during initial GPS acquisition.

Specifications

• Display: 10.4-inch diagonal, sunlight-readable touchscreen.
• GPS Receiver: WAAS/SBAS enabled, 10 Hz update rate.
• Navigation: Supports VFR and IFR operations.
• Terrain Database: Worldwide terrain and obstacle data.
• Traffic: TIS compatible (requires traffic receiver).
• Power Requirements: 10-32 VDC, 3.5A typical.
• Operating Temperature: -20°C to +55°C.
• Dimensions: Standard 3 ATI short case.
• Weight: Approximately 4.5 lbs (2.0 kg).
• Certification: TSO-C146a, TSO-C151b, TSO-C63e.

Controls and Settings

Primary interface via touchscreen. Physical buttons: POWER, BACKLIGHT, AUDIO.

Touchscreen Functions: Direct-touch interface for all operations including map panning, waypoint selection, and menu access.

Navigation Pages: Map, Nearest, Waypoint, Flight Plan, Traffic, Terrain. System Settings: Units, Time, Display brightness, Audio volume, Database management. Flight Planning: Create, edit, activate, and reverse flight plans. Map Settings: Range, orientation (North up/Track up), terrain display, traffic display.

Connecting Devices

GPS Antenna: TNC connector. Power: Aircraft power bus. Avionics: RS-232 or ARINC 429.

1. Ensure aircraft power is OFF before making connections.
2. Connect GPS antenna with clear view of sky.
3. Connect to compatible traffic receiver for traffic display.
4. Interface with autopilot for navigation steering commands.
5. Connect audio output to aircraft intercom or audio panel.

Tip: Use shielded cables for all data connections and maintain proper separation from high-current wiring.

Navigation and Flight Planning

Supports VFR and IFR navigation with flight plan management.

1. Create flight plan: Touch FLIGHT PLAN button, enter departure, destination, and waypoints.
2. Activate flight plan: Select ACTIVATE from flight plan page.
3. Direct-to navigation: Touch DIRECT button, enter waypoint identifier.
4. Nearest functions: Access nearest airports, intersections, VORs, NDBs.
5. Approach selection: Choose instrument approaches at destination airports.
6. Holding patterns: Create and execute holding patterns.
7. Vertical navigation: Set altitude constraints for waypoints.
8. Traffic avoidance: Monitor traffic display and follow ATC instructions.

WARNING! GPS navigation is supplemental to proper flight planning and pilot judgment. Always carry appropriate paper charts as backup.

Safety Features

Terrain Awareness: Color-coded terrain display with alerts. Traffic Display: Shows proximate traffic with resolution advisories. Obstacle Warning: Alerts for man-made obstacles. Minimum Safe Altitude Warning (MSAW): Alerts when below minimum safe altitude. Database Alerts: Notices for special use airspace and temporary flight restrictions.

Care & Cleaning

Power off before cleaning. Use only approved screen cleaners and microfiber cloth. Do not use abrasive materials or harsh chemicals.

CAUTION! Never spray liquids directly on screen. Ensure unit is completely dry before powering on.

Regulatory Information

FCC Compliance: This device complies with part 15 of the FCC Rules. Operation is subject to the condition that this device does not cause harmful interference. FAA Approval: TSO-C146a (Standalone GPS), TSO-C151b (TAWS), TSO-C63e (TIS). Copyright © Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com/aviation or contact Garmin Aviation Support at 1-800-800-1020.

Troubleshooting

Reset: System > Maintenance > Reset to Factory Defaults (use caution).

Service: Contact authorized Garmin dealer or Garmin Aviation Support at 1-800-800-1020.