4x1 HDMI KVM Switch User Manual
Model: LKV441
Important Safety Instructions
- To prevent electric shock, please ensure that all devices are properly grounded.
- Do not place this device near or over a radiator or heat register, or where it is exposed to direct sunlight.
- Place the device in a well-ventilated area, do not block any ventilation openings.
- Do not expose this device to rain or place it near water. Any liquid that goes into the apparatus may cause a failure, fire, or electric shock.
- Do not place the device on an uneven or unstable surface. The device may fall resulting in a malfunction.
- Never insert anything metallic into the open parts of this device. This may cause a danger of electric shock.
- The device should be repaired only by a qualified technician.
- If a three-party power supply is used, please ensure that the power supply specifications meet the product requirements.
Introduction
This is a 4-in 1-out ultra-high-definition switcher, supporting 4 HDMI signal inputs and 1 HDMI signal output. The highest resolution is 4Kx2K@60Hz and it is backward compatible, supporting KVM control. A variety of control methods (IR remote control, button, and RS-232) allow for easy switching of content from the 4 HDMI signal sources to the display. The product is widely used in security monitoring, education and training, exhibitions and broadcasting, command centers, etc.
Features
- Supports 4 HDMI input signals and 1 HDMI output signal.
- Supports up to 4096x2160@60Hz resolution and is backward compatible.
- Supports KVM functionality.
- Supports multiple switching modes: IR remote control, button, RS-232.
- Supports USB 2.0.
- Supports EDID passthrough and auto downscaling.
- Supports HDR10.
- Plug and play, easy installation.
Package Contents
- KVM Switch x1
- Power Adapter 5V/1A x1
- User Manual x1
- Remote Control x1
- Mounting Ear x2
- Screw x6
- Grounding Screw x1
- Terminal Block x1
- USB 2.0 Type A to Type B Cable x4
Installation Requirements
- HDMI source device (e.g., DVD player, game console, set-top box, PC).
- HDMI display device (e.g., TV, projector with HDMI port).
- HDMI cable: Standard HDMI 2.0 cable (supports 4Kx2K@60Hz).
Panel Description
| Port/Indicator | Description |
|---|---|
| ① USB 2.0 (Type-A) | Connect with USB devices (keyboard, mouse). |
| ② IR receiving window | Receive IR signal for remote control. |
| ③ HDMI input indicator | Corresponding to HDMI input 1, 2, 3, 4 respectively. Indicates which input is active. |
| ④ Switch button | Press the button to switch the input signal source. |
| ⑤ Power indicator | When there is power, the indicator will light solid yellow. |
| ⑥ DC 5V | Connect with DC 5V/1A power adapter. |
| ⑦ RS-232 | Used for RS-232 command control. |
| ⑧ HDMI input (1-4) | Connect with HDMI source devices. |
| ⑨ USB 2.0 (Type-B) | Connect to the computer's USB ports with USB cables for KVM function. |
| ⑩ HDMI output | Connect with HDMI display device. |
| ⑪ USB 2.0 (Type-A) | Connect with keyboard and mouse for KVM function. |
Remote Control
The remote control features:
- "<" and ">" buttons: To choose the channel forward or backward.
- "1-4" number buttons: To choose any source device as needed.
Installation
Connection Diagrams
The connection diagram illustrates the setup: Four PCs (PC1, PC2, PC3, PC4) are connected via HDMI cables and USB cables to the KVM switch. An HDMI display is connected to the HDMI output. A DC 5V power adapter and an RS-232 control connection are also shown.
Connection Instructions
- Connect the source devices to the HDMI input ports using HDMI cables.
- Connect the display device to the HDMI output port using an HDMI cable.
- To use the KVM function, connect the mouse and keyboard to the USB Type-A ports of the switch, and connect the computer to the switch using a USB Type A to Type B cable.
- Power on all devices to begin.
Note: Signal source switching can be done by pressing the switch button on the unit or by using the remote control.
RS-232 Control
RS-232 communication parameters:
- Baud rate: 9600
- Data bits: 8
- Stop character: 1
- Parity: None
RS-232 Commands
| Command | Description | Example/Status |
|---|---|---|
| PS1XR | Reset: Restart the device. | |
| PS11R | HDMI1 input | |
| PS12R | HDMI2 input | PS12R OK |
| PS13R | HDMI3 input | |
| PS14R | HDMI4 input | |
| Recover | Restore factory settings. | |
| Status | Query for status information. | If no HDMI port is inserted, 'NA' is displayed. 'PS12R' is displayed if HDMI 2 was the last to be inserted. |
| Baud XX | Set baud rate value. | 9600 (default), 19200 |
FAQ
Q: No image output?
A:
- Check the power supply and ensure the power indicator is on.
- Verify that HDMI cables are connected securely.
- Ensure the TV is set to the correct input channel.
- When connecting via HDMI to a PC or laptop, confirm the display output mode is set to 'mirror' or 'extend'.
Q: Picture quality is not fluent and stable?
A:
- Check and ensure all HDMI cables are connected properly.
- Try connecting the source device directly to the display device, or test with a different source device to assess picture quality.
- Use a high-quality HDMI standard cable when inputting HDMI 4K signals.
Specification
| Item | Description |
|---|---|
| HDMI version | HDMI 2.0 (HDR, YUV4:4:4), Compatible with HDCP 2.2, HDCP 1.4 |
| HDMI interface | 4 HDMI inputs, 1 HDMI output |
| Transmission rate | 18Gbps |
| Bandwidth | 600MHz |
| Resolution | 4096x2160@24/25/30/50/60Hz, 3840x2160@24/25/30/50/60Hz, 1080i@50/60Hz, 1080p@50/60Hz, 720p@50/60Hz, 576i@50Hz, 576p@50Hz, 480i@60Hz, 480p@60Hz, 3440x1600, 3440x1440, 2560x1600, 2560x1440, 2048x1080, 1920x1440, 2560x1080 |
| Audio format | LPCM7.1/DTS-HD/DTS-Audio/Dolby Digital plus/Dolby TrueHD 7.1/Dolby Digital/Dolby Atmos |
| RS-232 | 3 Pin (GND/Rx/Tx), Baud rate 9600 |
| Voltage | DC 5V/1A |
| Power consumption | < 3W |
| Working temperature | -20°C to 60°C |
| Storage temperature | -30°C to 70°C |
| Humidity | 0-90%RH |
| Housing | Iron |
| Color | Black |
| Weight | 510g |
| Dimension | 250.0(L) x 80.0(W) x 21.0(H) mm |
| Protection | ESD protection: 1a Contact discharge level 2 (±4KV), 1b Air discharge level 3 (±8KV). Implementation of the standard: IEC61000-4-2. Lightning protection, Surge protection. |
Disclaimer
The product name and brand name may be registered trademarks of their respective manufacturers. ™ and ® symbols may be omitted in this user manual. The images in this user manual are for reference only. The terms HDMI, HDMI High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. The company reserves the right to make changes without further notice to the product or system described herein to improve reliability, function, or design.
