YUNZII B75 Mechanical Keyboard User Manual

1. Introduction

This manual provides detailed instructions for the setup, operation, and maintenance of your YUNZII B75 Mechanical Keyboard. The YUNZII B75 is a 75% layout mechanical keyboard featuring hot-swappable switches, RGB backlighting, a gasket-mounted design, and double-shot PBT keycaps. It is designed for compatibility with Windows and Mac operating systems.

Figure 1: YUNZII B75 Mechanical Keyboard Overview

2. Package Contents

Verify that all items are present in your package:

• YUNZII B75 Mechanical Keyboard
• Dust Cover
• Keycap Puller
• USB Cable (Type-C to Type-A)
• Extra Keycaps and Switches
• User Manual (this document)

Figure 2: Keyboard and Included Accessories

Unboxing and Initial Inspection

Upon opening the package, carefully remove the keyboard and all accessories. Inspect for any visible damage. The keyboard is protected by a dust cover during transit.

Video 1: YUNZII B75 Black Hot Swappable Mechanical Keyboard with Knob - Unboxing and Overview

3. Setup

3.1 Connecting the Keyboard

The YUNZII B75 keyboard connects via a detachable USB-C cable. Ensure the cable is securely connected to both the keyboard and your computer.

1. Locate the USB-C port on the back of the keyboard.
2. Connect the USB-C end of the provided cable to the keyboard.
3. Connect the USB-A end of the cable to an available USB port on your computer.
4. For Mac users with only USB-C ports, a USB hub or adapter may be required.

Video 2: How to connect your B75 Keyboard to your devices

3.2 Adjusting Keyboard Height

The keyboard features dual-stage adjustable stands on the underside to customize the typing angle for ergonomic comfort.

Figure 3: Dual-Stage Adjustable Feet

4. Operating the Keyboard

4.1 Key Layout and Design

The B75 features a 75% layout, providing a compact form factor while retaining essential keys, including a dedicated function row and arrow keys. The keyboard incorporates a gasket-mounted structure and multi-layer padding for a consistent and comfortable typing experience.

Figure 4: Gasket Keyboard Structure Diagram

4.2 RGB Backlighting Control

The keyboard features customizable RGB backlighting with multiple effects and colors. Use the following shortcuts to adjust the lighting:

• Fn + Backspace: Turn ON/OFF backlights.
• Fn + Insert: Change backlight mode (19 types available).
• Fn + End: Change backlight color (9 types available).
• Fn + PgUp: Change lighting effect direction.
• Fn + Up Arrow: Increase brightness (5 levels).
• Fn + Down Arrow: Decrease brightness (5 levels).
• Fn + Left Arrow: Decrease blinking speed (5 levels).
• Fn + Right Arrow: Increase blinking speed (5 levels).

Video 3: Backlight Adjustment of YUNZII B75 Mechanical Keyboard

Figure 5: RGB Shortcuts

4.3 Multi-Function Rotary Knob

The keyboard includes a rotary knob for quick adjustments. Long press the knob to switch between RGB control mode and Multimedia control mode.

• Multimedia Mode: Rotate to adjust volume (+/-), press to mute/unmute.
• RGB Mode: Rotate to adjust backlight brightness, press to change backlight mode.

Figure 6: Multi-Function Rotary Knob

4.4 FN Key Shortcuts

Utilize the FN key in combination with the F-row keys for quick access to various functions:

4.5 Custom Software

The YUNZII B75 supports custom software (Windows only) for advanced personalization. This software allows you to:

• Program macro keys.
• Customize lighting colors and effects.
• Set custom shortcut keys.
• Edit macros.
• Adjust sleep time settings.

Figure 7: Custom Software Interface

5. Maintenance

5.1 Cleaning the Keyboard

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

• Use the provided dust cover when the keyboard is not in use.
• Gently wipe the keycaps and frame with a soft, damp cloth.
• For deeper cleaning, use the keycap puller to remove keycaps and clean underneath.

5.2 Hot-Swappable Switches and Keycaps

The YUNZII B75 features hot-swappable switch sockets, allowing you to easily change mechanical switches without soldering. It supports both 3-pin and 5-pin mechanical switches.

Figure 8: Hot-Swappable Switches

The keyboard comes with durable double-shot PBT keycaps in a Cherry profile, known for their resistance to wear and shine. Use the included keycap puller to safely remove and replace keycaps.

Figure 9: Double-Shot PBT Keycaps

6. Troubleshooting

6.1 Connection Issues

If the keyboard is not responding or backlights are off after connecting:

• Ensure the USB-C cable is fully inserted into both the keyboard and the computer.
• Try connecting the keyboard to a different USB port on your computer.
• If using a USB hub, try connecting the keyboard directly to the computer or a different hub port.
• Test with a different USB-C cable if available.

6.2 Resetting the Keyboard

To reset the keyboard to its factory default settings (white backlight, default speed):

• Press and hold Fn + ESC for 3-5 seconds.
• The keyboard will reset, and the backlights will restore to white.

6.3 Windows Key Lock

To lock or unlock the Windows key:

• Press Fn + Win. The WIN indicator light will illuminate when locked and turn off when unlocked.

7. Specifications

8. Warranty and Support

For warranty information, technical support, or any product-related inquiries, please refer to the official YUNZII website or contact their customer service directly. Contact details are typically provided on the product packaging or the manufacturer's official support page.