Garmin GPS 640 Manual

The Garmin GPS 640 is a high-performance automotive navigation system featuring a 6.1-inch touchscreen display, preloaded maps, voice-guided turn-by-turn directions, real-time traffic updates, Bluetooth connectivity for hands-free calling, and advanced lane guidance. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Navigation Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 6.1-inch touchscreen display, GPS antenna, Vehicle power adapter, USB cable, Dashboard mount, Remote Control (if included).

Feature	Description
Touchscreen Display	6.1-inch color display with anti-glare coating
Preloaded Maps	Detailed street maps of North America
Voice Guidance	Turn-by-turn directions with spoken street names
Real-Time Traffic	Lifetime traffic updates with compatible receiver
Bluetooth	Hands-free calling and smartphone notifications
Lane Assist	Shows proper lanes for navigation
Points of Interest	Millions of preloaded POIs
Speed Limit Display	Shows current road speed limits
Trip Planner	Plan routes with multiple destinations
Where Am I?	Emergency location information

Installation

Unpack and inspect contents. Choose mounting location.

Mount device: Clean dashboard area, attach mount using adhesive disk or suction cup.
Connect power: Plug vehicle power adapter into 12V accessory socket.
Position GPS: Attach device to mount, adjust for optimal viewing angle.
External antenna: Connect optional external GPS antenna for improved reception.

WARNING! Do not mount in driver's line of sight. Ensure mount is secure before driving.

First-Time Setup

Power on device; follow on-screen prompts.

Initial setup: Select language, agree to terms, set time zone.
GPS acquisition: Place device with clear view of sky for satellite lock.
Configure preferences: Set measurement units, voice preferences, map display options.
Pair Bluetooth: Enable Bluetooth on smartphone, pair with GPS 640.

CAUTION! Complete initial setup before driving. Do not operate while vehicle is in motion.

Specifications

Display: 6.1-inch WQVGA color touchscreen.
GPS Receiver: High-sensitivity WAAS-enabled receiver.
Memory: Internal flash memory with microSD card slot.
Battery: Rechargeable lithium-ion, up to 1 hour battery life.
Connectivity: Bluetooth, USB 2.0.
Audio: Built-in speaker, 3.5mm headphone jack.
Power: 12V vehicle adapter, 5V USB.
Dimensions: 6.3" W x 3.7" H x 0.8" D.
Weight: 7.2 ounces.
Operating Temp: -4° to 140°F (-20° to 60°C).

Controls and Settings

Access menus via touchscreen. Physical buttons: Power, Volume.

Main Menu: Where To?, View Map, Trip Planner, Traffic, Settings.

Navigation Settings: Route preferences (Fastest, Shortest, Avoidances), Voice guidance volume, Map detail level. System Settings: Brightness, Volume, Language, Units, Bluetooth, System Information. Map Display: 2D/3D view, Day/Night mode, Points of Interest categories.

Connecting Devices

Bluetooth: For hands-free calling and smartphone notifications. USB: For computer connection and map updates.

Turn on Bluetooth on both devices.
On GPS 640: Settings > Bluetooth > Add Device.
Select your phone from discovered devices.
Enter pairing code if prompted (typically 0000 or 1234).

Tip: For best Bluetooth performance, keep phone within 10 feet of GPS unit.

Navigation Features

Supports address search, POI search, recent destinations, favorites.

Enter destination: Tap Where To? > Address or Points of Interest.
Route calculation: Device calculates route based on selected preferences.
Start navigation: Tap Go! to begin guided navigation.
During navigation: View turn-by-turn directions, estimated arrival time, distance to next turn.
Detour: Tap Detour to avoid current road segment.
Stop navigation: Tap Stop or X to cancel route guidance.
Save location: Tap Save to add to Favorites.
Trip computer: View trip statistics including distance, time, average speed.

WARNING! Always verify route safety. Device suggestions may not account for all road conditions.

Accessibility Features

Voice Guidance: Multiple language options, adjustable volume. Screen Settings: High contrast mode, adjustable brightness for day/night driving. Simplified Menus: Option for simplified interface with larger buttons.

Care & Cleaning

Unplug before cleaning. Use soft, dry cloth only; no liquids or abrasive cleaners.

CAUTION! Do not use alcohol, ammonia, or window cleaners on screen. Avoid extreme temperatures.

Regulatory Information

FCC Compliance: This device complies with Part 15 of FCC rules. Operation is subject to conditions that device does not cause harmful interference. Copyright © Garmin Ltd. or its subsidiaries. For support, visit www.garmin.com/support or contact 1-800-800-1020.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Loose connection	Check power adapter connection; try different 12V socket.
Poor GPS signal	Obstructed view	Move to location with clear view of sky; wait 5 minutes.
Touchscreen not responding	Screen protector/dirt	Remove screen protector; clean screen; restart device.
Bluetooth not connecting	Pairing issue	Delete pairing on both devices; restart and re-pair.
Incorrect route	Outdated maps	Update maps via Garmin Express; check route preferences.
Device freezing	Software issue	Perform soft reset (hold power button 10 seconds).

Reset: Settings > System > Master Reset (erases all user data).

Updates: Connect to computer with Garmin Express for software and map updates.

Service: 1-800-800-1020; www.garmin.com/support