Darkflash GD68 Mechanical Keyboard User Manual

1. Introduction

The Darkflash GD68 is a versatile 68-key mechanical keyboard designed for various operating systems including Windows, Android, Apple, and iOS. It offers three connection modes: Bluetooth, 2.4G wireless, and wired (USB Type-C), allowing seamless switching between up to 5 devices. Featuring PBT two-color keycaps, hot-swappable red switches, and a compact layout, the GD68 provides a responsive and customizable typing experience.

Figure 1: Darkflash GD68 Mechanical Keyboards (Ink Dyeing and Jasmine colors)

2. Specifications

Figure 2: Detailed Product Parameters

Figure 3: Red Switch (Linear Axis) Characteristics

3. Setup and Connection

The Darkflash GD68 keyboard supports three connection modes: 2.4G wireless, Bluetooth, and wired (USB Type-C). You can connect up to 5 devices simultaneously (1 via 2.4G, 3 via Bluetooth, 1 via wired).

3.1 Power On/Off and Mode Switch

Locate the ON/OFF switch on the back of the keyboard. Slide it to the "ON" position to power on the keyboard. The power-on indicator light will illuminate.

Figure 4: Power Switch and USB Receiver Storage

3.2 2.4G Wireless Connection

1. Plug the USB receiver into an available USB port on your PC or notebook.
2. Ensure the keyboard's power switch is in the "ON" position.
3. Short press the FN + R keys simultaneously to switch to 2.4G channel.
4. To enter pairing mode, press and hold FN + R for 3-5 seconds. The green light will flash quickly.
5. Insert the receiver within 20 seconds. If the connection is successful, the green light will turn solid, and then turn off. If pairing fails, the keyboard will power off after 20 seconds. Exit pairing mode by pressing FN + R again.

Figure 5: 2.4G Wireless Connection Steps

3.3 Bluetooth Connection

The keyboard supports up to three Bluetooth connections (BT1, BT2, BT3).

1. Ensure the keyboard's power switch is in the "ON" state; the power-on indicator light should be on.
2. Short press FN + Q, FN + W, or FN + E to select one of the Bluetooth groups (BT1, BT2, BT3). The blue light will flash nine times every time a device is switched, indicating the switch is successful.
3. To enter Bluetooth pairing mode, press and hold FN + Q/W/E (for the selected group) for 3-5 seconds. The blue light of the corresponding button indicator will flash quickly.
4. On your device (computer, tablet, phone), search for Bluetooth devices and select "Darkflash GD68".
5. After the connection is successful, the indicator light stops flashing, indicating that the code pairing is successful.

Figure 6: Bluetooth Connection Steps

3.4 Wired Connection

1. Connect the Type-C end of the charging cable to the keyboard and the USB end to your computer.
2. In wired mode, the "ON/OFF" switch has no function.
3. Short press FN + T to switch to wired mode.

Figure 7: Wired Connection Diagram

Figure 8: Multi-Device Connectivity Overview

4. Operating Instructions

4.1 Key Functions and Combinations

The GD68 features a compact 68-key layout. Many functions are accessed via the FN key in combination with other keys. The keyboard supports full-key no punch design, ensuring all key combinations are registered accurately and promptly.

• FN + 1 to 0: Typically used for F1-F10 functions or other programmed shortcuts.
• FN + - / =: Often used for F11/F12 functions.
• FN + Q/W/E: Switch between Bluetooth devices (BT1, BT2, BT3).
• FN + R: Switch to 2.4G wireless mode.
• FN + T: Switch to wired mode.
• FN + Win: Lock/Unlock Windows key.
• FN + Alt: Switch between Mac and Windows layouts (if applicable, check specific keycap legends).
• FN + Shift: Access secondary functions printed on keycaps (e.g., multimedia controls, brightness).

Refer to the keycap legends for specific secondary functions accessible via the FN key.

4.2 Visible State Indicator Lights

The keyboard features four visual status indicator lights located near the spacebar. These lights provide quick information about the keyboard's power status and connection mode.

• Power Prompt: Indicates battery status (e.g., low battery, charging).
• Connection Status: Shows the active connection mode (2.4G, Bluetooth 1/2/3, or wired).
• Pairing Status: Flashes during pairing mode for 2.4G or Bluetooth.

Figure 9: Visible State Indicator Lights

4.3 Battery Management

The keyboard is equipped with a 1200mAh rechargeable lithium polymer battery. Connect the keyboard via the USB Type-C cable to charge it. A full charge takes approximately 2 hours and provides up to 90 days of usage time under laboratory conditions (actual usage may vary).

Figure 10: Battery Life and Charging Information

5. Maintenance

5.1 Hot-Swappable Switches

The GD68 features a full-key hot-swappable design, allowing you to easily replace the mechanical switches without soldering. This enables customization of typing feel and simplifies switch replacement if needed.

1. Gently remove the keycap using a keycap puller.
2. Use a switch puller to carefully extract the switch from the PCB.
3. Align the pins of the new switch with the holes on the PCB and press firmly until it clicks into place.
4. Replace the keycap.

Caution: Ensure the switch pins are straight before inserting to avoid bending or damaging the PCB sockets.

Figure 11: Hot-Swappable Switch Replacement

5.2 Cleaning

To maintain your keyboard's performance and appearance:

• Disconnect the keyboard from all devices before cleaning.
• Use a soft brush or compressed air to remove dust and debris from between the keycaps.
• For stubborn dirt, gently remove keycaps (refer to 5.1) and clean with a damp cloth or mild cleaning solution. Ensure keycaps are completely dry before reattaching.
• Wipe the keyboard surface with a soft, lint-free cloth.
• Avoid using harsh chemicals or abrasive materials.

6. Troubleshooting

• Keyboard not connecting via 2.4G or Bluetooth:
  • Ensure the keyboard is powered on and fully charged.
  • Verify the correct mode is selected (FN+R for 2.4G, FN+Q/W/E for Bluetooth).
  • Re-enter pairing mode (hold FN+R or FN+Q/W/E for 3-5 seconds).
  • For 2.4G, try plugging the USB receiver into a different port.
  • For Bluetooth, remove the keyboard from your device's Bluetooth list and attempt to pair again.
  • Ensure no other wireless devices are causing interference.
• Keys not responding or double-typing:
  • Check if the keyboard is in wired mode (FN+T) and the cable is securely connected.
  • If using wireless, ensure the battery is not low.
  • Consider if a switch might be faulty. Thanks to the hot-swappable design, you can easily replace individual switches (refer to 5.1).
  • Clean under the keycaps to remove any debris.
• Indicator lights not working as expected:
  • The GD68 does not have full RGB backlighting; it features specific indicator lights for status.
  • If a light is not illuminating, ensure the keyboard is powered on and functioning.
  • A flashing light usually indicates pairing mode or low battery.
• Keyboard not charging:
  • Ensure the USB Type-C cable is securely connected to both the keyboard and a power source/computer.
  • Try a different USB port or charging cable.
  • Verify the power source is active.

7. User Tips

• Multi-Device Efficiency: Take full advantage of the keyboard's ability to connect to up to 5 devices. Assign different Bluetooth channels (BT1, BT2, BT3) to your tablet, phone, and a secondary computer for quick switching.
• Customization with Hot-Swapping: Experiment with different types of 3-pin mechanical switches to find your preferred typing feel. The hot-swappable design makes this process simple and risk-free.
• Understanding Indicator Lights: Pay attention to the indicator lights near the spacebar. They provide crucial feedback on battery status, connection mode, and pairing status, helping you quickly diagnose issues.

8. Warranty and Support

For specific warranty information and technical support, please refer to the documentation provided with your purchase or contact the Darkflash Official Store directly. Keep your proof of purchase for warranty claims.

The manufacturer warrants this product to be free from defects in materials and workmanship under normal use for a period specified at the time of purchase. This warranty does not cover damage caused by accident, abuse, misuse, or unauthorized modification.