Logitech K400 Plus Wireless Touch TV Keyboard User Manual

Introduction

The Logitech K400 Plus is a wireless keyboard with an integrated touchpad, designed for comfortable control of your PC-to-TV entertainment from the comfort of your couch. It eliminates the need for separate keyboard and mouse devices, offering a streamlined experience for navigating your connected computer on a television screen.

This compact and lightweight keyboard features quiet keys and a large 3.5-inch touchpad for effortless navigation. It offers a reliable wireless range of up to 10 meters (33 feet), ensuring uninterrupted enjoyment. The K400 Plus is compatible with Windows, Android, and Chrome OS, and is designed for quick plug-and-play setup using the small Logitech Unifying receiver.

Image: Top view of the Logitech K400 Plus keyboard, showing the full QWERTY layout and integrated touchpad on the right.

Setup

Setting up your Logitech K400 Plus keyboard is a simple plug-and-play process.

1. Insert Batteries: The keyboard requires two AA batteries. Open the battery compartment on the underside of the keyboard and insert the batteries, ensuring correct polarity.
2. Locate the Unifying Receiver: The small Logitech Unifying receiver is typically stored inside the battery compartment of the keyboard for safe transport.
3. Connect the Receiver: Plug the Logitech Unifying receiver into an available USB port on your computer or TV device.
4. Power On: Turn on the keyboard using the power switch, usually located on the top left side of the keyboard.
5. Automatic Connection: The keyboard should automatically connect to the receiver. No additional pairing steps are typically required.

For advanced customization of controls, you can download and install the Logitech Options software from the official Logitech website.

Image: The Logitech Unifying receiver, illustrating its ability to connect up to six compatible Logitech devices simultaneously.

Operating Instructions

The Logitech K400 Plus is designed for intuitive control of your media and computer functions.

Keyboard Layout and Functions

The keyboard features a standard AZERTY layout for French users, along with dedicated media control keys and function keys (F-keys) that can be used for various shortcuts.

• Standard Typing: Use the keys as you would on any standard keyboard for text input.
• Function Keys (F1-F12): These keys often have secondary functions (e.g., media controls, volume, brightness) accessible by pressing the Fn key simultaneously.
• Windows/Android Shortcuts: The keyboard includes shortcuts optimized for Windows and Android operating systems, providing quick access to common functions.

Image: A user's hands on the Logitech K400 Plus, illustrating the layout and key areas for media control (5), touchpad (6), and navigation shortcuts (1-4).

Integrated Touchpad

The large 3.5-inch touchpad allows for precise cursor control and navigation without the need for an external mouse.

• Pointing: Move your finger across the touchpad surface to move the cursor on the screen.
• Clicking: Use the left and right click buttons located below the touchpad, or tap the touchpad surface for a left click.
• Scrolling: Use two fingers to scroll vertically or horizontally on the touchpad.
• Multi-touch Gestures: The touchpad supports various multi-touch gestures for enhanced navigation, depending on your operating system. Refer to your OS documentation for specific gestures.

Image: A detailed view of the integrated touchpad, highlighting the "Point" (single finger) and "Scroll" (two fingers) gestures.

Media Controls

Dedicated media keys provide quick access to playback and volume controls.

• Volume Control: Buttons for Mute, Volume Down, and Volume Up are located above the touchpad.
• Media Playback: Dedicated keys for Play/Pause, Previous Track, and Next Track are integrated into the function row (F-keys).

Image: A person comfortably using the Logitech K400 Plus keyboard from a couch, demonstrating the reliable 10-meter wireless range to a TV.

Maintenance

Proper care and maintenance will ensure the longevity of your Logitech K400 Plus keyboard.

• Battery Replacement: The keyboard boasts an 18-month battery life. When the battery indicator light (if present) signals low power, or if performance degrades, replace the two AA batteries. Always use fresh, high-quality batteries.
• Power Management: Utilize the On/Off switch on the keyboard when not in use to conserve battery life.
• Cleaning: Clean the keyboard and touchpad with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, but ensure no liquid enters the keyboard.
• Spill Resistance: The keyboard features a spill-resistant design (tested for up to 60 ml of liquid). In case of a spill, immediately power off the keyboard, disconnect it, and allow it to dry completely before reuse. Do not immerse the keyboard in liquid.

Troubleshooting

If you encounter issues with your Logitech K400 Plus keyboard, try the following steps:

• No Connection/Lag:
  • Ensure the keyboard is powered on.
  • Check that the Unifying receiver is securely plugged into a working USB port.
  • Move the keyboard closer to the receiver. The wireless range is up to 10 meters, but obstacles or interference can reduce it.
  • Replace the batteries if they are low.
  • Try plugging the Unifying receiver into a different USB port.
• Keys Not Responding:
  • Check battery level.
  • Ensure the keyboard is connected (see "No Connection/Lag" above).
  • Restart your computer or device.
• Touchpad Not Working:
  • Ensure the keyboard is powered on and connected.
  • Clean the touchpad surface to remove any dirt or debris.
  • Check your device's settings to ensure the touchpad is enabled.
• Unexpected Behavior:
  • If you have other wireless devices nearby, try moving them away to reduce potential interference.
  • Re-pair the keyboard with the Unifying receiver using the Logitech Unifying Software (available for download from Logitech's website) if connection issues persist.

If these steps do not resolve the issue, please refer to the Logitech support website for further assistance.

Specifications

Image: The Logitech K400 Plus keyboard displaying its physical dimensions (35 cm length, 14 cm width) and indicating the use of AA batteries.

Warranty and Support

Logitech provides a manufacturer's warranty for the K400 Plus keyboard.

• Manufacturer's Warranty: This product comes with a 2-year manufacturer's warranty.
• Spare Parts Availability: Spare parts are guaranteed to be available for 2 years.
• Software Updates: Software updates are guaranteed until April 13, 2030.
• Customer Support: For technical support, warranty claims, or further assistance, please visit the official Logitech support website. You can find detailed FAQs, troubleshooting guides, and contact information there.

For the most up-to-date information, please refer to the official Logitech website or the documentation included with your product.