LG SoundPlate LAP340 - User Manual

Questions and Answers

T
thomascochranJul 26, 2025
What to do if my LG SoundPlate LAP340 remote control isn't working?
- P
  Patricia ReyesJul 27, 2025
  If your LG Speaker System remote isn't working, try these steps: 1. Make sure you're within 7 meters of the unit. 2. Remove any obstacles between the remote and the unit. 3. Replace the battery with a new one.
A
Ashley WebbJul 31, 2025
Why is there no sound coming from my LG SoundPlate LAP340 Speaker System?
- B
  Bianca MaddenJul 31, 2025
  First, ensure the correct input source is selected. If the input source is correct, check if the mute function is activated. If it is, press i or adjust the volume to cancel it.
B
Brian GarrettAug 6, 2025
How to fix low output sound on LG SoundPlate LAP340 Speaker System?
- K
  Karen RodriguezAug 6, 2025
  If the sound output from your LG speaker system is low: * When connected to a TV, change the AUDIO DIGITAL OUT setting on the TV Setup Menu from [PCM] to [AUTO] or [BITSTREAM]. * When connected to a Player, change the AUDIO DIGITAL OUT setting on the Player Setup Menu from [PCM] to [PRIMARY PASS-THROUGH] or [BITSTREAM]. * Change the Audio DRC setting on the Player setup menu to the [OFF] state.
H
hcunninghamAug 11, 2025
What to do if my LG Speaker System has no power?
- B
  brandy85Aug 11, 2025
  First, verify that the power cord is properly plugged in. If it is, check the condition by operating other electronic devices.
F
fieldsdavidAug 16, 2025
Why is the LG Speaker System Auto power on/off function not working?
- P
  pruittmarcAug 16, 2025
  The Auto Power On/Off function may not work depending on the connected device. Check the status of the AUTO POWER ON/OFF switch on the rear panel of the unit.
C
Christine BonillaAug 21, 2025
How to stop noise on the periphery of the LG SoundPlate LAP340 Speaker System?
- F
  figueroamargaretAug 21, 2025
  If you notice noise around your LG speaker system, it might be due to the furniture it's placed on. Check if the furniture is firm and horizontal. If the noise persists, try placing a tablecloth between the unit and the surface.

Summary

Getting Started

Safety Information

Crucial safety warnings and precautions for operating the SoundPlate unit.

Important Safety Instructions

Lists 14 essential safety instructions for proper use and maintenance.

Setting Up the Unit

Guides on positioning and weight/size considerations for placing the unit.

Connecting the Unit

Instructions for connecting the optical cable and power cord to the unit and TV.

Unit Placement Cautions

Warnings against placing the TV on the unit's edge or if the TV exceeds weight limits.

Operating

Using Bluetooth Technology

Overview of Bluetooth connectivity for wireless audio streaming.

Listening to Music Stored on Bluetooth Devices

Troubleshooting

No Power

Troubleshooting steps for when the unit does not turn on.

No Sound

Solutions for issues where no audio output is detected from the unit.

Remote Control Malfunction

Steps to resolve problems with the remote control's functionality.

This document is an owner's manual for the LG SoundPlate™ models LAP340, LAP345C, and LAP347C. It provides information on safety, setup, operation, troubleshooting, and specifications for the device.

Function Description

The LG SoundPlate™ is a sound system designed to be positioned under a TV, enhancing the audio experience with optimized sound effects, prominent bass, and cinematic surround sound. It offers various input options and connectivity features for versatile use.

Important Technical Specifications

Power Requirements: AC 120 V, 60 Hz
Power Consumption: 25 W
Dimensions (W x H x D): 700 mm x 38.5 mm x 320 mm (27.6" x 1.5" x 12.6") (With foot)
Net Weight (Approx.): 3.8 kg (8.4 lb)
Operating Temperature: 5 °C to 35 °C (41 °F to 95 °F)
Operating Humidity: 5% to 90%
Digital In (Optical In): 3.3 V (p-p), Optical jack
Available Digital Input Audio Sampling Frequency: 32 kHz, 44.1 kHz, 48 kHz, 96 kHz
Amplifier Total Output: 120 W
Stereo Mode: 20 W x 2 (8 Ω at 1 kHz)
Surround Mode: 20 W x 2 (8 Ω at 1 kHz)
Built-In Subwoofer: 40 W (4 Ω at 100 Hz)
THD: 0.1%

Usage Features

LG Sound Sync: This feature allows control of the unit's volume level using the remote control of a compatible LG TV. It supports both wired (optical cable) and wireless connections.
- Wired Connection: Connect the unit to the TV via an optical cable. Set up LG Sound Sync (Optical) on the TV. The green LED on the unit indicates successful connection and sound output.
- Wireless Connection: Turn on the unit, select LG TV function, and set up LG Sound Sync (Wireless) on the TV. A blinking white LED indicates pairing, and a solid white LED indicates a successful connection.
Bluetooth Technology: Enables wireless connection to Bluetooth devices (mobile phones, MP3 players, laptops, PDAs, etc.) for listening to music. The unit supports the A2DP (Advanced Audio Distribution Profile).
- Pairing: Select the Bluetooth function on the remote control (orange LED blinks). Operate the Bluetooth device to search for "LG SOUND PLATE (XX:XX)" (where XX:XX are the last four digits of the BT address) and perform pairing. The orange LED becomes solid for about 3 seconds upon successful pairing.
- Limitations: Bluetooth connection is limited to one device at a time, and multi-pairing is not supported. Sound interruption may occur due to interference or distance. Reconnection is required if the unit is restarted or the function is changed.
Optical Input Operation: Connect the TV to the unit using an optical cable. Select the OPTICAL function on the remote control. The green LED lights up for 3 seconds, indicating sound output from the TV. It is recommended to turn off TV speaker sound to avoid sound differences.
AUTO POWER On/Off: This function automatically turns the unit on/off when the connected TV or external device (DVD Player, Blu-ray Disc Player) is turned on/off. It is supported only on OPTICAL and LG TV functions and can be enabled/disabled via a switch on the rear panel.
- Note: The unit will automatically turn off if there is no signal for a certain period. If the unit is turned off directly, AUTO POWER function will not turn it on automatically unless an optical signal is received after 5 seconds of no signal.
Auto Power Down: The unit will turn itself off to save power if it is not connected to an external device and unused for 25 minutes.
CINEMA SOUND: Optimizes sound for movies, providing prominent bass and cinematic surround effects. This feature can be toggled on/off using the CINEMA SOUND button on the remote control. It is turned off when the unit restarts.
Remote Control: A dedicated remote control is provided for power on/off, volume adjustment, mute, CINEMA SOUND, Optical function selection, and Bluetooth function selection. The LED indicator on the unit changes color to reflect the current status (Off, Standby, Booting, Mute, Bluetooth ready, Cinema Sound on/off, LG Sound Sync ready/paired, Optical function selected).

Maintenance Features

Handling the Unit:
- Shipping: Retain the original shipping carton and packing materials for maximum protection if the unit needs to be shipped.
- Exterior Surfaces: Avoid using volatile liquids like insecticide spray. Do not wipe with strong pressure. Do not leave rubber or plastic products in contact with the unit for extended periods.
Cleaning the Unit: Use a soft, dry cloth for cleaning. For extremely dirty surfaces, a soft cloth lightly moistened with a mild detergent solution can be used. Avoid strong solvents such as alcohol, benzine, or thinner, as they may damage the surface.
Battery Installation (Remote Control): The remote control uses a coin/button cell battery (CR2025). To install, turn the battery cover counterclockwise with a coin, insert the battery with the minus (-) side facing correctly, and then turn the cover clockwise to close.
- Warning: Do not ingest the battery as it can cause severe internal burns. Keep new and used batteries away from children. If the battery compartment does not close securely, stop using the product and seek immediate medical attention if batteries are swallowed or placed inside the body.
Ferrite Core (Optional): A ferrite core may be affixed to the power cord to reduce or eliminate electrical interference. To attach, open the stopper, wind the power cord around the core once, and close the core until it clicks.