UGREEN 90478 CM571 HDMI 2.0 KVM Switch User Manual

Introduction

The UGREEN 90478 CM571 is an HDMI 2.0 KVM (Keyboard, Video, Mouse) switch designed to allow two computers to share a single monitor, keyboard, and mouse. This device supports 4K resolution at 60Hz and enables the sharing of additional USB peripherals, such as printers and USB drives, between the connected computers. It is ideal for environments where space is limited or for users who need to manage multiple systems efficiently.

UGREEN 90478 CM571 HDMI 2.0 KVM Switch device overview — Figure 1: UGREEN 90478 CM571 HDMI 2.0 KVM Switch. This image shows the compact design of the KVM switch with its various ports.

Setup Instructions

Follow these steps to connect your UGREEN KVM switch:

Power Off Devices: Ensure both computers, the monitor, and any peripherals are powered off before beginning the connection process.
Connect Monitor: Connect your monitor to the HDMI OUT port on the KVM switch using an HDMI cable.
Connect Computers:
- Connect the HDMI output of Computer 1 to HDMI IN 1 on the KVM switch.
- Connect the HDMI output of Computer 2 to HDMI IN 2 on the KVM switch.
- Connect a USB-A to USB-B cable from Computer 1 to USB IN 1 on the KVM switch.
- Connect a USB-A to USB-B cable from Computer 2 to USB IN 2 on the KVM switch.
Connect Keyboard & Mouse: Connect your USB keyboard and mouse to the dedicated USB 2.0 ports on the KVM switch (often labeled with keyboard/mouse icons or 'USB 2.0').
Connect Other USB Peripherals: Connect any other USB devices (e.g., printer, USB drive) to the available USB 2.0 ports on the KVM switch.
Power On: Power on the KVM switch (if it has a separate power input, though often bus-powered), then power on your monitor, and finally, power on your computers.

Connection diagram for UGREEN KVM switch — Figure 2: Connection Diagram. This diagram illustrates how to connect two computers, a monitor, keyboard, and mouse to the KVM switch.

User operating two computers with one monitor, keyboard, and mouse — Figure 3: Shared Monitor/Keyboard & Mouse Setup. This image demonstrates a user efficiently managing two computer hosts with a single set of peripherals.

Operating Instructions

The UGREEN KVM switch offers convenient methods for switching between connected computers:

Physical Button Switching: Press the button located on the top of the KVM switch to toggle between Computer 1 and Computer 2. An LED indicator will typically show which computer is currently active.
Desktop Controller Switching: Use the included wired desktop controller for remote switching. Connect the controller to the designated port on the KVM switch. Press the button on the desktop controller to switch between computers.

KVM switch with physical button and desktop controller — Figure 4: Switching Methods. This image highlights the physical button on the KVM switch and the separate desktop controller for convenient switching.

When you switch between computers, the monitor, keyboard, mouse, and any other connected USB peripherals will automatically switch to the selected computer.

KVM switch sharing printer and USB drives — Figure 5: Shared Peripherals. This diagram illustrates how the KVM switch allows sharing of printers, USB drives, and other devices, eliminating the need for repeated plugging and unplugging.

Maintenance

Keep the device in a dry, well-ventilated area, away from direct sunlight and heat sources.
Clean the exterior of the KVM switch with a soft, dry cloth. Do not use liquid cleaners or aerosols.
Avoid placing heavy objects on the KVM switch.
Ensure all cables are securely connected to prevent signal loss or intermittent issues.

Troubleshooting

No Display on Monitor:

Ensure all HDMI cables are securely connected to both the KVM switch and the computers/monitor.
Verify that the correct input source is selected on your monitor.
Try connecting the monitor directly to the computer to confirm the monitor and computer's video output are working.
Check if the KVM switch is receiving power (if applicable).

Keyboard/Mouse Not Responding:

Ensure the keyboard and mouse are connected to the correct USB ports on the KVM switch.
Verify the USB cables connecting the computers to the KVM switch are properly connected.
Try connecting the keyboard/mouse directly to the computer to confirm they are functional.
Some specialized gaming keyboards/mice with advanced features may require direct connection or specific drivers; try a standard keyboard/mouse first.

Resolution or Refresh Rate Issues (e.g., not 4K@60Hz):

Ensure your monitor and graphics card both support 4K@60Hz.
Use high-quality HDMI 2.0 certified cables for all video connections. Lower quality or older HDMI cables may not support the full bandwidth required for 4K@60Hz.
Update your graphics card drivers on both computers.
Check display settings on your operating system to ensure the correct resolution and refresh rate are selected.

Specifications

Feature	Detail
Model	90478 CM571
Brand	UGREEN
HDMI Version	HDMI 2.0
Video Resolution	Up to 4K@60Hz
Inputs	2 x HDMI, 2 x USB-B (for computers)
Outputs	1 x HDMI, Multiple x USB 2.0 (for keyboard, mouse, peripherals)
Switching Method	Physical button on device, Wired desktop controller
Wattage	1W (typically bus-powered via USB)
Origin	Mainland China

User Tips

For optimal performance, especially with 4K@60Hz, ensure you use high-quality, certified HDMI 2.0 cables.
Utilize the KVM's USB ports to share not just your keyboard and mouse, but also other USB peripherals like printers, scanners, or external hard drives, to reduce cable clutter and save time.
If you experience any lag or unresponsiveness with your keyboard or mouse, try connecting them to the dedicated USB 2.0 ports on the KVM switch first, as these are often optimized for HID devices.

Warranty and Support

UGREEN products are designed for reliability and performance. For warranty information, technical support, or service inquiries, please refer to the official UGREEN website or contact their customer support directly. Keep your purchase receipt for warranty claims.