YUNZII B75 PRO Wireless Mechanical Keyboard

Introduction

This manual provides detailed instructions for the YUNZII B75 PRO Wireless Mechanical Keyboard. It covers essential information regarding setup, operation, maintenance, and troubleshooting to ensure you get the most out of your keyboard. The B75 PRO features a 75% layout with a multi-function knob, hot-swappable switches, gasket-mount structure, and versatile connectivity options.

The YUNZII B75 PRO keyboard, showcasing its compact 75% layout and distinct purple and white keycaps.

Key Features

• 75% Layout with Knob: Compact design with 82 keycaps, including number keys, function keys, and arrow keys, plus a multi-function knob for media and backlight control.
• Gasket Mount Structure with Five-Layer Padding: Advanced gasket design with 5-layer padding for noise cancellation, providing a creamy sound and solid typing feel.
• Tri-mode Connectivity: Supports Bluetooth, 2.4GHz wireless, and stable wired (Type-C) connections for versatile use across devices.
• Hot-Swappable PCB: Compatible with 3-pin/5-pin mechanical switches, allowing for easy customization of typing feel and sound.
• Pre-lubed Linear Switches: Features pre-lubricated Cocoa Cream V2 switches for a smooth and consistent keystroke.
• South-facing RGB LEDs: Over 20 built-in backlight modes with customizable dynamic RGB effects.
• Programmable Software: Allows for key redefinition, macro settings, and RGB customization on Windows systems.
• 4000mAh High-Capacity Battery: Ensures extended usage times in wireless mode.

An overview of the YUNZII B75 PRO's primary features, highlighting its design and technical capabilities.

Setup

Package Contents

Before you begin, please ensure all items are present in the package:

• YUNZII B75 PRO Mechanical Keyboard
• Extra 7 keycaps and 4 switches
• Keycap and switch puller
• Keyboard cable (USB Type-C)
• User Manual
• Dust cover

All items included in the YUNZII B75 PRO keyboard package.

Connection Modes

The B75 PRO supports three connection methods:

• Bluetooth: Press FN + 1 / 2 / 3 to switch between up to 3 Bluetooth devices.
• 2.4GHz Wireless: Press FN + 4 to activate 2.4GHz mode. Insert the 2.4GHz receiver into your device's USB port.
• Wired (Type-C): Connect the keyboard to your device using the provided USB Type-C cable. This mode also charges the keyboard.

Visual guide to the three available connection modes for the B75 PRO keyboard.

Hot-Swappable Switches

The B75 PRO features a hot-swappable PCB, allowing you to easily change mechanical switches without soldering. This provides flexibility to customize your typing feel and sound. The PCB is compatible with both 3-pin and 5-pin switches.

To replace a switch:

1. Use the included keycap puller to gently remove the keycap.
2. Use the included switch puller to carefully grip the switch and pull it straight up.
3. Align the pins of the new switch with the holes on the PCB and press it firmly until it clicks into place. Ensure pins are straight to avoid bending.
4. Re-attach the keycap.

Detailed view of the hot-swappable PCB and Cocoa Cream V2 switches.

Illustration of the full key hot-swappable design, highlighting its components.

Operating Instructions

Multimedia Control Knob

The multi-function knob located on the top right of the keyboard provides quick access to multimedia and RGB controls:

• Short Press: Mute/unmute audio.
• Rotate: Adjust volume up or down.
• Long Press (2-3 seconds): Switch between Multimedia Mode (default) and RGB Mode.

In RGB Mode, rotating the knob will adjust the RGB backlight brightness.

Functions of the multi-media knob for both multimedia and RGB control.

RGB Backlighting

The B75 PRO features vibrant RGB backlighting with multiple effects. Use the following key combinations to control the lighting:

• FN + INSERT: Change backlight effect.
• FN + BACKSPACE: Turn backlight effect ON/OFF.
• FN + ↑ (Up Arrow): Increase brightness.
• FN + ↓ (Down Arrow): Decrease brightness.
• FN + ← (Left Arrow): Change backlight color.
• FN + → (Right Arrow): Change lighting effect direction.
• FN + [ : Decrease blinking speed.
• FN + ] : Increase blinking speed.

Basic controls for RGB backlight effects.

Advanced controls for customizing RGB backlight settings.

Programmable Software

For advanced customization, including key remapping, macro settings, and detailed RGB control, download the official YUNZII software. This software is compatible with Windows systems.

• Visit the official YUNZII website to download the latest software version.
• Install the software and connect your keyboard via wired mode for optimal performance during configuration.
• Explore options for light settings, button settings, macro management, and other preferences.

The programmable software interface for customizing keyboard settings.

FN Key Functions (Windows Quick Start)

Utilize the FN key in combination with function keys for quick access to various system controls:

Common FN key shortcuts for Windows users.

Maintenance

Cleaning the Keyboard

To maintain the longevity and appearance of your keyboard:

• 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 keycaps and frame.
• For dust and debris between keycaps, use compressed air or a small brush.
• Avoid using harsh chemicals or abrasive materials that could damage the surface.

Keycap and Switch Replacement

As detailed in the Setup section, the B75 PRO's hot-swappable design allows for easy replacement of keycaps and switches. Regularly inspect switches for any signs of wear or damage. If a switch feels inconsistent or stops responding, it can be replaced using the provided tools and spare switches.

Troubleshooting

Here are solutions to common issues you might encounter:

• Q1: Why is the keyboard's red light flashing below the spacebar?
  A: When the battery is lower than 15%, the spacebar will flash red slowly. When charging, the spacebar will stay green. After charging is complete, the spacebar will restore to the normal RGB mode.
• Q2: The keyboard doesn't work or doesn't charge.
  A: Please download the firmware from the official YUNZII website and try updating it. Stop any background software and update the firmware in wired mode.
• Q3: The Windows key doesn't work.
  A: Please try pressing FN + WIN to unlock it. This should resolve the issue.
• Q4: Keyboard goes to sleep too quickly in wireless mode.
  A: The default sleep function is set to save battery. You can adjust the sleep timer using the programmable software. Connect the keyboard via wired mode, open the software, and modify the sleep settings.

Quick solutions to frequently asked questions.

Specifications

Battery Information

The YUNZII B75 PRO is equipped with a 4000mAh Lithium Ion battery. To check the battery level in wireless mode, long press FN + Ctrl. The RGB lighting will indicate the approximate battery percentage:

• 25%
• 50%
• 75%
• 100%

Instructions for checking the keyboard's battery level.

Compatibility

The YUNZII B75 PRO keyboard is designed for broad compatibility, working seamlessly with various operating systems and devices:

• Windows (PC)
• macOS (Mac)
• Laptop
• Smartphone
• Tablet

The keyboard's compatibility with a wide range of systems and devices.

Warranty and Support

YUNZII products are designed for quality and durability. For specific warranty information, please refer to the warranty card included with your product or visit the official YUNZII website. For technical support, firmware updates, or any inquiries, please contact YUNZII customer service through their official channels or visit their brand store:

Visit the YUNZII Store on Amazon