MMD KM40 Mechanical Keyboard User Manual

Introduction

The MMD KM40 is a versatile mechanical keyboard designed for both gaming and professional use. Featuring a robust CNC aluminum body and an O-Ring gasket structure, it offers a premium typing experience. With three connection modes (Bluetooth 5.0, 2.4G Wireless, and wired Type-C), QMK/VIA compatibility for full key customization, and vibrant RGB lighting, the KM40 provides flexibility and performance for various computing environments.

Package Contents

• MMD KM40 Mechanical Keyboard
• Type-A to Type-C Data Cable
• User Manual (this document)

Setup

1. Charging the Keyboard

Before initial use, ensure the keyboard is fully charged. Connect the provided Type-A to Type-C data cable to the keyboard's Type-C port and a computer's USB port. A full charge typically takes a few hours.

Important Charging Precaution: Always use a computer's standard USB port for charging. Avoid using fast chargers or high-current charging adapters, as this may damage the battery or PCB and void the warranty.

2. Connection Modes

The MMD KM40 supports three connection methods:

The MMD KM40 supports Bluetooth, 2.4G wireless, and wired Type-C connections.

Wired Connection (Type-C)

1. Connect the Type-C end of the data cable to the keyboard and the Type-A end to your computer's USB port.
2. The keyboard will be automatically recognized and ready for use.

2.4G Wireless Connection

1. Locate the 2.4G USB receiver (usually stored in a compartment on the keyboard).
2. Plug the 2.4G USB receiver into an available USB port on your computer.
3. Switch the keyboard to 2.4G mode (refer to the keyboard's function keys or switch for mode selection).
4. The keyboard should connect automatically. If not, press the pairing button (if available) or consult the QMK/VIA software for pairing instructions.

Bluetooth 5.0 Connection (Three Channels)

1. Switch the keyboard to Bluetooth mode.
2. On your computer or device, enable Bluetooth and search for new devices.
3. Select "MMD KM40" (or similar name) from the list of available devices.
4. If prompted, enter the pairing code.
5. The KM40 supports up to three Bluetooth devices. Use the designated function keys (e.g., Fn + 1, Fn + 2, Fn + 3) to switch between paired devices.

Operating Instructions

1. Key Customization (QMK/VIA)

The MMD KM40 keyboard is fully customizable using QMK/VIA software. This allows you to remap keys, create macros, and configure multiple layers of key functions.

The keyboard supports open-source QMK/VIA for advanced customization.

The keyboard features 44 keys with 10 customizable layers, offering up to 430 actual usable key values. The default key values are for display purposes; actual settings need to be configured by the user.

The 10 customizable layers include settings for regular use, gaming, modeling, editing, color grading, office tasks, tables, drawing, code, and connection/lighting.

To customize:

1. Download the QMK Toolbox or VIA software from the official QMK/VIA website.
2. Connect your keyboard via the Type-C cable.
3. Follow the software instructions to remap keys, create macros, and manage layers.

2. Lighting Effects

The KM40 features 22 types of lighting effects and 16 million color RGB dazzling lights. Use the designated function keys (e.g., Fn + specific key) to cycle through lighting modes, adjust brightness, and change colors. Refer to the QMK/VIA software for advanced lighting customization.

3. Hot-Swappable Switches

The keyboard features full-key hot-swappable sockets, allowing you to easily change mechanical switches without soldering. This enables users to customize the typing feel to their preference.

4. Compatible Platforms

The MMD KM40 is compatible with Windows and Mac operating systems.

Maintenance

1. Cleaning

• Use a soft, dry cloth to wipe the keyboard surface.
• For stubborn dirt, slightly dampen the cloth with water or a mild cleaning solution.
• To clean between keycaps, use compressed air or a small brush.
• Keycaps can be removed for deeper cleaning. Use a keycap puller to avoid damage.

2. Keycap Care

The keycaps are made of 1.7mm thick PBT with five-sided dye-sublimation, which is durable and resistant to wear and shine. Avoid using harsh chemicals or abrasive materials that could damage the keycap legends.

Troubleshooting

1. Keyboard Not Responding

• Wired Mode: Ensure the Type-C cable is securely connected to both the keyboard and the computer. Try a different USB port or cable.
• 2.4G Wireless Mode: Ensure the 2.4G receiver is plugged in and the keyboard is switched to 2.4G mode. Re-pair if necessary.
• Bluetooth Mode: Check if Bluetooth is enabled on your device and the keyboard is in Bluetooth mode. Try re-pairing the device. Ensure the keyboard is charged.

2. Keys Not Working

• If individual keys are not working, try removing and re-inserting the switch for that key, as the keyboard is hot-swappable.
• Ensure no debris is lodged under the keycap or switch.
• If using custom key mappings, reset to default or check your QMK/VIA configuration.

3. Charging Issues

If the keyboard is not charging, ensure you are using a standard computer USB port and not a fast charger. Refer to the charging precautions in the Setup section.

4. Lighting Not Working

• Check if the lighting is turned off or set to minimum brightness.
• Cycle through lighting effects using function keys.
• Verify lighting settings in QMK/VIA software.

Specifications

Detailed configuration list for the MMD KM40 keyboard.

Force curves for Colorful INK, New Star NP, and INK White Linear switches.

Detailed diagram of the keyboard's O-Ring gasket structure and internal components.

User Tips

• Experiment with different switch types to find your preferred typing feel, thanks to the hot-swappable design.
• Utilize the QMK/VIA software to create custom key layouts for specific applications or games to enhance productivity and gaming performance.
• Take advantage of the three connection modes to seamlessly switch between multiple devices (e.g., desktop, laptop, tablet).

Warranty and Support

For warranty information, technical support, or any product-related inquiries, please contact the seller or the official MMD customer service. Keep your purchase receipt as proof of purchase.