LG LH-CX640 Series Manual

The LG LH-CX640 Series is a high-performance home entertainment system featuring advanced audio technologies, multiple connectivity options, and user-friendly controls. This manual provides comprehensive guidance on setup, operation, maintenance, and troubleshooting for optimal performance. Below are key sections covering features, installation, configuration, specifications, and support.

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

Features at a Glance

Key components: High-fidelity speaker system, Remote Control, Multiple audio inputs, Bluetooth connectivity, USB port, Optical input, Ethernet port.

Feature	Description
Bluetooth Connectivity	Wireless audio streaming from compatible devices
USB Port	For playing audio files from USB storage devices
Optical Input	Digital audio connection for TV and other sources
Ethernet Port	Wired network connection for firmware updates
AC Power Input	For power connection
Auxiliary Input	3.5mm audio jack for external devices
POWER	Turns system on/off
VOLUME	Adjusts audio output level
SOURCE	Selects input source
BLUETOOTH	Activates pairing mode

Installation

Unpack and inspect all components. Place main unit on stable, level surface.

Position speakers: Place left and right speakers at ear level, angled toward listening area.
Connect speakers: Use provided cables to connect speakers to main unit terminals.
Connect power: Plug AC power cord into wall outlet.
Connect audio sources: Use appropriate cables for TV, media players, or other devices.

WARNING! Ensure proper ventilation around unit; do not block vents. Keep away from heat sources.

First-Time Setup

Power on system; follow initialization sequence.

Select language: Press SETUP button, navigate to LANGUAGE menu, select preferred language.
Pair Bluetooth: Press BLUETOOTH button, enable Bluetooth on your device, select "LG LH-CX640" from list.
Configure network: Connect Ethernet cable or use wireless setup for firmware updates.
Adjust audio settings: Use SOUND menu to set equalizer, balance, and surround effects.

CAUTION! Handle speakers with care; avoid dropping or placing heavy objects on them.

Specifications

Audio Output: 2.1 Channel, 100W Total RMS Power.
Frequency Response: 50Hz - 20kHz.
Connectivity: Bluetooth 4.2, USB 2.0, Optical Input, Auxiliary Input, Ethernet.
Supported Formats: MP3, WMA, AAC, FLAC, WAV.
Power Requirements: 120V AC, 60Hz, 50W.
Dimensions: Main Unit: 15.7" x 3.9" x 8.3"; Speakers: 9.8" x 6.3" x 7.1".
Weight: Main Unit: 8.8 lbs; Each Speaker: 4.4 lbs.
Operating Temperature: 41°F to 95°F (5°C to 35°C).

Controls and Settings

Access menu system via remote or front panel buttons. Front Panel: POWER, VOLUME, SOURCE, BLUETOOTH.

Remote: POWER, Numeric presets, VOLUME, MUTE, SOURCE, MENU, NAVIGATION arrows, ENTER, RETURN.

Audio Settings: Equalizer presets (MOVIE, MUSIC, SPORTS, GAME), Bass/Treble adjustment, Balance, Surround mode. Network: Ethernet/Wi-Fi setup, Firmware update. System: Language, Auto standby, Factory reset. Bluetooth: Pairing, Device list management.

Connecting Devices

TV: Use optical cable for best audio quality. Media Players: Use auxiliary or USB connection. Smartphones/Tablets: Use Bluetooth or auxiliary cable.

Turn off system and device before making connections.
Use appropriate cables for each connection type.
Select correct input source using SOURCE button or remote.

Tip: For optimal digital audio quality, use optical connection when available.

Audio Playback

Supports various audio sources and playback modes.

USB playback: Insert USB device, select USB source, navigate folders using remote.
Bluetooth streaming: Pair device, select Bluetooth source, control playback from device.
Preset stations: Store up to 30 FM radio presets using auto-scan feature.
Sound modes: Cycle through presets for different content types.
Volume control: Adjust using remote or front panel; set maximum volume limit in menu.
Mute function: Press MUTE to temporarily silence audio.

WARNING! Do not remove USB device during playback; use safe ejection procedure.

Network Features

Firmware Updates: Connect to internet for automatic or manual updates. Network Audio: Stream from compatible DLNA servers. Control App: Use LG Music Flow app for enhanced control (available for iOS/Android).

Care & Maintenance

Unplug from power before cleaning. Use soft, dry cloth for exterior surfaces. For stubborn stains, dampen cloth slightly with water only.

CAUTION! Do not use chemical cleaners, solvents, or abrasive materials. Keep liquids away from unit.

Regulatory Information

FCC Compliance: This device complies with Part 15 of FCC Rules. Operation is subject to conditions: (1) device may not cause harmful interference, (2) device must accept any interference received. ICES-003: Complies with Canadian ICES-003. Copyright © 2023 LG Electronics Inc. All rights reserved. For support, visit www.lg.com or contact LG Customer Service at 1-800-243-0000.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power cord/outlet	Check power connection; try different outlet; ensure power switch is on.
No sound from speakers	Connections/volume	Verify speaker connections; check volume level; ensure correct source selected.
Bluetooth not connecting	Distance/pairing	Move devices closer; delete old pairing; restart both devices.
USB not recognized	Format/compatibility	Ensure USB is FAT32 formatted; try different USB device; check file formats.
Poor audio quality	Source/connections	Check audio source quality; ensure secure cable connections; adjust equalizer settings.

Reset: Hold POWER button for 10 seconds to soft reset; Factory reset via menu.

Service: 1-800-243-0000; www.lg.com