FL ESPORTS CMK75 Mechanical Keyboard User Manual

1. Product Overview

The FL ESPORTS CMK75 is a versatile 75% layout mechanical keyboard designed for both gaming and productivity. It features a unique TFT color screen, a multi-function knob, and advanced tri-mode connectivity (2.4G wireless, Bluetooth, and USB-C wired). Its hot-swappable PCB allows for easy switch customization, and durable PBT keycaps ensure longevity. The gasket structure provides a comfortable and responsive typing experience.

Figure 1.1: Overview of the CMK75 Mechanical Keyboard.

2. Package Contents

Please verify that all items are present in the package:

• CMK75 Mechanical Keyboard
• USB-C Cable
• 2.4G Wireless Receiver (stored in keyboard)
• User Manual (this document)

3. Setup

3.1 Initial Setup and Charging

Before first use, it is recommended to fully charge the keyboard. Connect the provided USB-C cable to the keyboard's USB-C port and the other end to a powered USB port on your computer or a wall adapter. The keyboard features a 3000mAh battery.

Figure 3.1: USB-C port and connection mode switch on the side of the keyboard.

3.2 Connection Modes

The CMK75 keyboard supports three connection modes: 2.4G Wireless, Bluetooth, and USB-C Wired. Use the switch located on the side of the keyboard to select your desired mode.

Figure 3.2: The CMK75 supports 2.4G Wireless, USB-C Wired, and Bluetooth 5.0 connections.

3.2.1 2.4G Wireless Connection

1. Locate the 2.4G wireless receiver, which is magnetically stored in a compartment on the underside of the keyboard.


Figure 3.3: The 2.4G wireless receiver is conveniently stored in the keyboard's base.

2. Plug the 2.4G receiver into an available USB port on your computer.
3. Set the connection mode switch on the keyboard to the 2.4G wireless icon. The keyboard will automatically connect.

3.2.2 Bluetooth Connection

1. Set the connection mode switch on the keyboard to the Bluetooth icon.
2. Press and hold Fn + 1, Fn + 2, or Fn + 3 for 3-5 seconds to enter Bluetooth pairing mode. The indicator light on the TFT screen will flash, indicating it's ready to pair.
3. On your device (computer, tablet, phone), open Bluetooth settings and search for available devices.
4. Select "CMK75 BT3.0 KB" or "CMK75 BT5.0 KB" from the list to connect.
5. Once connected, the indicator light will become solid. You can pair up to three Bluetooth devices and switch between them using Fn + 1/2/3.

3.2.3 USB-C Wired Connection

1. Connect the provided USB-C cable to the keyboard's USB-C port.
2. Connect the other end of the USB-C cable to a USB port on your computer.
3. Set the connection mode switch on the keyboard to the wired (USB) icon. The keyboard will be recognized automatically by your system.

4. Operating Instructions

4.1 TFT Color Screen Functions

The integrated TFT color screen displays various useful information and allows for customization:

• Information Display: Shows date, time, battery level, current WIN/OS system, active connection mode (2.4G/BT/Wired), RGB light mode, and language.
• Customization: Supports custom hand-drawn patterns and GIF animations via the dedicated software.

Figure 4.1: The TFT color screen provides real-time information and customization options.

4.2 Multi-Function Knob

The metal knob located next to the TFT screen provides quick control over multimedia functions:

• Rotate: Adjusts system volume.
• Press: Mutes/unmutes audio.

4.3 Hot-Swapping Switches

The CMK75 features a hot-swappable PCB, allowing you to change mechanical switches without soldering. It supports both 3-pin and 5-pin switches.

1. Gently pull the keycap off the switch using a keycap puller.
2. Use a switch puller to carefully remove the switch from the PCB. Ensure you pull straight up to avoid bending the pins.
3. Align the pins of the new switch with the holes on the PCB.
4. Press the new switch firmly into place until it clicks. Ensure it is seated properly and the pins are not bent.
5. Replace the keycap.

Figure 4.2: The hot-swappable PCB allows for easy switch replacement.

4.4 RGB Lighting Control

The keyboard features customizable RGB backlighting. You can cycle through various lighting effects and adjust brightness directly on the keyboard or through the software.

• Fn + \|: Cycle through RGB lighting modes.
• Fn + ↑: Increase brightness.
• Fn + ↓: Decrease brightness.
• Fn + ←: Decrease lighting speed.
• Fn + →: Increase lighting speed.

Figure 4.3: The CMK75 features dynamic RGB backlighting.

4.5 Pro Software Customization

For advanced customization, including RGB backlight modes, macro settings, and TFT screen GIF uploads, download the official FL ESPORTS software. The software allows for detailed configuration of keybindings and personalized animations.

Figure 4.4: The Pro Software provides extensive customization options for the keyboard.

5. Maintenance

5.1 Cleaning

To maintain your keyboard's appearance and functionality:

• Disconnect the keyboard from power before cleaning.
• Use a soft, lint-free cloth slightly dampened with water or a mild cleaning solution to wipe down the keycaps and chassis.
• For dust and debris between keycaps, use compressed air or a small brush.
• Avoid harsh chemicals or abrasive materials.

5.2 Battery Care

The keyboard is equipped with a 3000mAh Lithium Polymer battery. To prolong battery life:

• Avoid fully discharging the battery frequently.
• Store the keyboard in a cool, dry place when not in use for extended periods.
• If storing for a long time, charge the battery to about 50% to prevent deep discharge.

6. Troubleshooting

• Keyboard not responding: Ensure the keyboard is charged. Check the connection mode switch is set correctly (2.4G, BT, or Wired). For wireless modes, ensure the receiver is properly plugged in or Bluetooth is paired. Try connecting via USB-C cable to rule out wireless issues.
• Bluetooth connection issues: Ensure the keyboard is in pairing mode (Fn + 1/2/3 held until flashing). Remove previous pairings from your device's Bluetooth list and try re-pairing. Ensure your device's Bluetooth is enabled.
• TFT screen not displaying: Ensure the keyboard is powered on. If the backlight is off, the screen might also be off. Check the keyboard's power switch.
• Keys not registering: If specific keys are not working, try hot-swapping the switch with a known working one to determine if the issue is with the switch or the PCB. Ensure switches are fully seated.
• Software not detecting keyboard: Ensure the keyboard is connected via USB-C cable. Restart the software and/or your computer. Check for updated software versions on the official FL ESPORTS website.
• RGB lighting issues: Use Fn key combinations to cycle through modes and adjust brightness. If issues persist, try resetting the keyboard (refer to software or manufacturer website for specific reset instructions) or reinstalling the software.

7. Specifications

8. Warranty and Support

For warranty information and technical support, please refer to the official FL ESPORTS website or contact their customer service directly. Specific warranty terms may vary by region and retailer.

For the latest software and drivers, please visit the official FL ESPORTS support page.