Logitech K855 Wireless Mechanical Keyboard User Manual

Introduction

This manual provides comprehensive instructions for setting up, operating, maintaining, and troubleshooting your Logitech K855 Wireless Mechanical Keyboard. Designed for both office and gaming use, this 84-key keyboard offers versatile connectivity and a comfortable typing experience.

Setup Guide

Package Contents

Ensure all items are present in the package:

• Logitech K855 Wireless Mechanical Keyboard
• Logi Bolt USB Receiver
• User Documentation (this manual)

System Requirements

Before connecting your keyboard, ensure your device meets the following requirements:

• Logi Bolt USB Receiver: Available USB port. Compatible with Windows 10, Windows 11 or later; macOS 10.15 or later; Chrome OS™; Linux®.
• Bluetooth Low Energy: Bluetooth low energy wireless technology. Compatible with Windows 10 or later; macOS 10.15 or later; iPadOS 14.0 or later; iOS 14.0 or later; Chrome OS™; Linux; Android 8.0 or higher.
• Internet connection for downloading Logi Options+ software (optional, for advanced customization).

Connecting Your Keyboard

The Logitech K855 offers two connection methods: Logi Bolt USB Receiver or Bluetooth Low Energy.

Method 1: Using the Logi Bolt USB Receiver

1. Locate the Logi Bolt USB receiver in your keyboard's packaging.
2. Plug the Logi Bolt USB receiver into an available USB port on your computer.
3. Turn on the keyboard. It should automatically connect to the receiver.

Method 2: Using Bluetooth Low Energy

1. Turn on your keyboard.
2. Activate Bluetooth on your device (computer, tablet, or smartphone).
3. On your keyboard, press and hold one of the Easy-Switch keys (usually F1, F2, or F3, indicated by a Bluetooth icon) until the LED indicator starts blinking rapidly, indicating pairing mode.
4. On your device, search for Bluetooth devices and select "Logitech K855" from the list.
5. Follow any on-screen prompts to complete the pairing process. The LED indicator on the keyboard will turn solid when connected.

Figure 1: Top view of the Logitech K855 keyboard, showing key layout.

Figure 2: Bottom view of the Logitech K855 keyboard, showing the battery compartment and adjustable feet.

Operating Instructions

Basic Keyboard Functions

The Logitech K855 features an 84-key layout with standard alphanumeric keys, function keys, and navigation keys. The mechanical TTC red switches provide a smooth, linear feel for comfortable and responsive typing.

Easy-Switch Functionality

The keyboard supports connecting to up to three devices simultaneously. Use the Easy-Switch keys (typically F1, F2, F3) to seamlessly switch between your paired devices. Press the desired Easy-Switch key to instantly connect to the corresponding device.

Function Keys (Fn)

The function keys (F1-F12) can perform special actions when pressed in combination with the 'Fn' key. These actions may include media control, volume adjustment, and other system shortcuts. Refer to your device's operating system for specific Fn key functionalities.

Logi Options+ Software (Optional)

For advanced customization, download and install the Logi Options+ software. This software allows you to:

• Reassign keys to perform custom actions.
• Adjust keyboard settings.
• Manage connected devices.
• Utilize Logitech Flow with compatible mice for seamless multi-computer control.

Figure 3: Close-up view of the mechanical TTC red switches, highlighting the linear feedback.

Figure 4: The compact design of the K855 keyboard, suitable for various workspaces.

Maintenance

Cleaning the Keyboard

To maintain optimal performance and appearance, clean your keyboard regularly:

• Disconnect the keyboard from your device before cleaning.
• Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe down the keys and surface.
• Avoid using harsh chemicals, abrasive cleaners, or spraying liquids directly onto the keyboard.
• For debris between keys, use compressed air.

Battery Replacement

The Logitech K855 keyboard has a battery life of up to 36 months, depending on usage. When the battery indicator light signals low power, replace the batteries:

1. Turn off the keyboard.
2. Locate the battery compartment on the underside of the keyboard (refer to Figure 2).
3. Open the compartment and remove the old batteries.
4. Insert new batteries, ensuring correct polarity.
5. Close the battery compartment and turn on the keyboard.

Troubleshooting

Keyboard Not Connecting

• Check Power: Ensure the keyboard is turned on and has sufficient battery power.
• USB Receiver: If using the Logi Bolt receiver, ensure it is securely plugged into a working USB port. Try a different USB port.
• Bluetooth: If using Bluetooth, ensure Bluetooth is enabled on your device and the keyboard is in pairing mode (blinking LED). Remove "Logitech K855" from your device's Bluetooth list and try pairing again.
• Distance: Ensure the keyboard is within the 10-meter wireless reception range of your device.
• Interference: Move away from other wireless devices or sources of interference (e.g., Wi-Fi routers, cordless phones).

Keys Not Responding

• Battery: Replace the batteries if the battery indicator is low.
• Connection: Re-establish the connection (see "Keyboard Not Connecting").
• Cleaning: Check for debris under the keys and clean as described in the Maintenance section.

Lag or Delayed Input

• Interference: Reduce wireless interference.
• Distance: Ensure the keyboard is close to the receiver or Bluetooth device.
• Battery: Low battery can affect performance. Replace if needed.

Specifications

Warranty and Support

Product Warranty

Your Logitech K855 keyboard is covered by a warranty that includes:

• Free Returns: Free returns are available within 90 days of purchase.
• Fast Delivery Guarantee: In case of delayed delivery, a $1.00 coupon code may be provided. Refunds are available if the package is lost or items are damaged during transit, or if no delivery occurs within 60 days.

Security and Privacy

Logitech is committed to protecting your personal information:

• Safe Payments: Personal details are not shared with third parties without your consent.
• Secure Personal Details: Your privacy is protected, and personal details are kept safe and secure.

Customer Support

For further assistance, technical support, or warranty claims, please refer to the official Logitech support channels or contact your retailer.