CORBOBO SK90 75% Wireless Gaming Keyboard User Manual

1. Introduction

Thank you for choosing the CORBOBO SK90 75% Wireless Gaming Keyboard. This manual provides detailed instructions for setting up, operating, and maintaining your keyboard to ensure optimal performance and longevity. The SK90 keyboard features a compact 75% layout, tri-mode connectivity, vibrant RGB backlighting, and convenient dual multimedia knobs, designed for both gaming and office use.

Package Contents:

• SK90 Keyboard x 1
• USB-C Cable x 1
• User Manual x 1

Figure 1.1: The CORBOBO SK90 75% Wireless Gaming Keyboard, showcasing its compact layout and RGB backlighting.

Figure 1.2: Overview of the SK90 keyboard's main features, highlighting its PBT keycaps, long battery life, dual knobs, ergonomic design, quiet operation, RGB lighting, and versatile connectivity.

2. Safety Information

Please read these safety instructions carefully before using the keyboard to prevent damage or injury:

• Do not expose the keyboard to extreme temperatures, humidity, or direct sunlight.
• Avoid dropping or subjecting the keyboard to strong impacts.
• Keep the keyboard away from liquids. While it features a spill-resistant design, excessive liquid exposure can cause damage.
• Do not attempt to disassemble or modify the keyboard. This will void the warranty.
• Use only the provided USB-C cable for charging and wired connection.

3. Setup

3.1 Unboxing

Carefully remove all components from the packaging. Inspect the keyboard and accessories for any signs of damage. Locate the USB receiver, which is conveniently stored in a compartment under one of the adjustable feet on the keyboard's underside.

Figure 3.1: The adjustable feet and the hidden USB receiver storage compartment.

3.2 Connecting the Keyboard

The SK90 keyboard supports three connection modes: Bluetooth (BT5.0), 2.4GHz Wireless, and USB-C Wired. You can switch between these modes using the toggle switch located on the side of the keyboard.

Figure 3.2: Tri-mode connection options for the SK90 keyboard.

3.2.1 2.4GHz Wireless Connection

1. Locate the USB receiver stored under the keyboard's adjustable foot.
2. Plug the USB receiver into an available USB port on your computer.
3. Toggle the connection switch on the keyboard to the '2.4G' position.
4. The keyboard should automatically connect to your device.

3.2.2 Bluetooth Connection (BT5.0)

1. Toggle the connection switch on the keyboard to the 'BT' position.
2. On your device (PC, Mac, Tablet, Smartphone), go to Bluetooth settings and enable Bluetooth.
3. The keyboard will appear as 'SK90' or similar in the list of available devices. Select it to pair.
4. The keyboard supports up to three Bluetooth devices. Use Fn + BT1/BT2/BT3 to switch between paired devices.

3.2.3 USB-C Wired Connection

1. Connect one end of the provided USB-C cable to the keyboard's USB-C port.
2. Connect the other end of the USB-C cable to an available USB port on your computer.
3. Toggle the connection switch on the keyboard to the 'USB-C' position.
4. The keyboard will function as a wired keyboard and also charge simultaneously.

3.3 Charging the Keyboard

The SK90 keyboard is equipped with a built-in 4000mAh battery. To charge, connect the keyboard to a USB power source using the provided USB-C cable. The charging indicator light will show the charging status. A full charge provides extended battery life for daily office and gaming needs.

4. Operating Instructions

4.1 Basic Keyboard Functions

The SK90 keyboard features a standard 75% layout with a dedicated number pad. All standard keys function as expected. Some keys have secondary functions accessible via the 'Fn' key.

4.2 RGB Backlighting Control

The keyboard offers 14 adjustable RGB backlighting modes with adjustable brightness. You can control the lighting effects using the dedicated left knob or the 'Fn' key combinations.

• Left Knob: Rotate to adjust RGB backlight brightness. Press to cycle through the 14 stunning lighting effects.
• Fn + ON/OFF Key: Press this combination to effortlessly switch between captivating RGB lighting effects.

Figure 4.1: Customizing RGB lighting effects on the SK90 keyboard.

4.3 Multimedia Control

The innovative dual-knob design provides quick and convenient multimedia control.

• Right Knob: Rotate to adjust multimedia volume. Press to toggle mute on/off.
• Left Knob: As mentioned above, controls RGB lighting modes and brightness.

Figure 4.2: Dual knob functionality for enhanced control.

4.4 Ergonomic Design and Adjustable Feet

The SK90 keyboard features an ergonomic tilt-angle design and adjustable feet at the bottom, allowing you to customize the typing angle for a comfortable experience. This promotes a more natural hand positioning during extended use.

Figure 4.3: Ergonomic design with adjustable feet for personalized comfort.

4.5 Quiet Typing Experience

The SK90 utilizes a high-quality membrane switch structure, providing soft, silent keystrokes. This minimizes noise disturbance, making it ideal for offices, libraries, or nighttime use.

Figure 4.4: Cushioned feel and silent membrane switches for quiet operation.

4.6 PBT Keycaps and Spill-Resistant Design

The keycaps are made from durable PBT material, which is resistant to oil, wear, and fading, ensuring a great feel even after prolonged use. The keyboard also features splash-proof and dust-resistant construction, protecting against accidental spills and making cleaning easy, thereby extending its lifespan.

Figure 4.5: Spill-resistant design protecting the keyboard from minor liquid exposure.

5. Maintenance

5.1 Cleaning

To keep your keyboard clean and functioning optimally:

• 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 surface.
• For dust and debris between keys, use compressed air.
• Do not use harsh chemicals, abrasive cleaners, or immerse the keyboard in water.

5.2 Storage

When not in use for extended periods, store the keyboard in a cool, dry place away from direct sunlight and extreme temperatures.

6. Troubleshooting

If you encounter issues with your SK90 keyboard, please refer to the following common solutions:

If the problem persists after trying these solutions, please contact CORBOBO customer support for assistance.

7. Specifications

8. Warranty and Support

CORBOBO products come with a standard manufacturer's warranty. For detailed warranty information, product support, or technical assistance, please refer to the warranty card included in your package or visit the official CORBOBO website. Please retain your proof of purchase for warranty claims.