LKV422 4x2 HDMI Matrix Switch User Manual
Important Safety Instructions
- To prevent electric shock, ensure all devices are properly grounded.
- Do not place the 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. Liquid ingress may cause failure, fire, or electric shock.
- Do not place the device on an uneven or unstable surface, as it may fall and malfunction.
- Never insert metallic objects into the open parts of this device, as this may cause a danger of electric shock.
- The device should only be repaired by a qualified technician.
- If a third-party power supply is used, ensure its specifications meet the product requirements.
Features
- Supports 4 HDMI inputs and 2 HDMI outputs.
- Supports resolutions up to 4096x2160@60Hz and is backward compatible.
- Supports HDR10.
- Offers multiple switching modes: IR remote control, buttons, RS-232.
- Provides additional audio output via a stereo jack and S/PDIF port.
- HDMI outputs support auto down-scaling.
- Includes lightning protection, surge protection, and ESD protection.
Package Contents
- Matrix switch x1
- Power adapter 5V/1A x1
- User manual x1
- Remote control x1
- Mounting ears x2
- Screws x6
- Grounding screws x2
- Terminal block x1
Introduction
The LKV422 is a 4-input, 2-output HDMI matrix switch that allows for flexible switching of 4 HDMI input signals to 2 HDMI displays. It supports resolutions up to 4096x2160@60Hz with HDR, offering multiple control methods (IR remote, buttons, RS-232). The device features auto down-scaling on HDMI outputs and provides additional audio outputs via S/PDIF and stereo jack. It is a reliable solution for ultra-high-definition video transmission in applications such as security monitoring, education, broadcasting, and command centers.
Installation Requirements
- HDMI source device (e.g., DVD player, game console, PC).
- HDMI display device (e.g., TV, projector, LED screen).
Panel Description
| Indicator/Port | Description |
|---|---|
| ① Power input | Connect with DC 5V/1A power adapter. |
| ② Reset pinhole | Press with a straightened paper clip to reset. |
| ③ HDMI output 1,2 | Connect to HDMI display devices. |
| ④ HDMI input 1,2,3,4 | Connect to HDMI source devices. |
| ⑤ S/PDIF out | Connect to an audio device with an optical audio cable. |
| ⑥ 3.5mm L/R out | Connect to an audio device with a stereo audio cable. |
| ⑦ RS-232 | Used for RS-232 command control. |
| ⑧ Power indicator | Solid yellow indicates power is on. |
| ⑨ Audio output indicator 1,2 | Corresponds to the audio output of HDMI 1 and 2. |
| ⑩ Audio switch | Switches audio output between HDMI 1 and 2. |
| ⑪ IR window | Receives IR signals from the remote control. |
| ⑫ HDMI input indicator 1,2,3,4 | Indicates the active HDMI input source (1-4). |
| ⑬ HDMI output switch 1,2 | Selects the input source for HDMI output 1 and 2. |
Remote Control
The included remote control allows for convenient switching of input and output signals.
Installation Procedures
Connection Diagram Overview
Connect HDMI source devices (e.g., DVD, PC) to the HDMI inputs and HDMI display devices (e.g., TV, projector) to the HDMI outputs. Optional connections include RS-232 for control and audio devices to the S/PDIF or stereo L/R ports.
Connection Steps
- Connect source devices to the HDMI input ports using HDMI cables.
- Connect display devices to the HDMI output ports using HDMI cables.
- If using RS-232 control, connect the control device to the RS-232 port.
- For additional audio output, connect audio devices to the L/R port and/or S/PDIF port with appropriate cables.
- Power on all connected devices to begin operation.
RS-232 Control
Communication Parameters: Baud rate: 9600, Data bits: 8, Stop bits: 1, Parity: none.
Operation Modes:
Mode One (Output Selection Commands):
| HDMI Input | HDMI Output 1 Command | HDMI Output 2 Command | HDMI Output 1/2 Command |
|---|---|---|---|
| HDMI1 | PS11R | PS21R | PA1R |
| HDMI2 | PS12R | PS22R | PA2R |
| HDMI3 | PS13R | PS23R | PA3R |
| HDMI4 | PS14R | PS24R | PA4R |
Mode Two (Status Read & Control):
The command PAXXR reads the status of all interfaces. Upon successful execution, the response is OKPXPX (where X is 1-4). An incorrect command results in ERR.
Example Command: PAP3P1 sets Output port HDMI 1 to receive content from input port HDMI 3, and Output port HDMI 2 to receive content from input port HDMI 1.
General Commands:
- Reset: Initiates a device restart.
- Recover: Restores the device to its factory default settings.
- BaudXX: Sets the baud rate (e.g.,
Baud9600,Baud19200). Default is 9600.
FAQ
Q: No video or audio signal output on the displays?
A: 1) Ensure the matrix switch is powered on and all cables are connected correctly. 2) Verify that the input channel on the displays is set correctly.
Q: Picture quality is not fluent and stable?
A: 1) Confirm all HDMI cables are securely connected. 2) Try connecting the source device directly to the display device, or test with a different source device to see if picture quality improves. 3) Use high-quality HDMI cables for 4K signals.
Specifications
| Item | Description |
|---|---|
| HDMI version | HDMI 2.0 (HDR, YUV444) |
| HDMI interface compatibility | Compatible with HDCP 2.2, HDCP 1.4 |
| HDMI interface ports | 4 HDMI inputs, 2 HDMI outputs |
| Transmission rate | 18Gbps |
| Resolutions Supported | 480i@60Hz, 480p@60Hz, 576i@50Hz, 576p@50Hz, 720p@50/60Hz, 1080i@50/60Hz, 1080p@50/60Hz, 3840×2160@24/25/30/50/60Hz, 4096x2160@24/25/30/50/60Hz |
| Audio format support | LPCM7.1/DTS-HD/DTS-Audio/Dolby Digital plus/ Dolby TrueHD 7.1/Dolby Digital 7.1CH/Dolby Atmos |
| RS-232 port | 3 Pin (GND/Rx/Tx), Baud rate 9600 |
| Voltage | DC 5V/1A |
| Power consumption | <4W |
| Working temperature | -20°C to 60°C |
| Storage temperature | -30°C to 70°C |
| Humidity | 0-90% RH (No Condensation) |
| Housing material | Iron |
| Color | Black |
| Weight | 375g |
| Dimensions (LxWxH) | 250.0mm x 80.0mm x 21.0mm |
| Protection features | ESD protection (Contact: ±4KV, Air: ±8KV, IEC61000-4-2 compliant), Lightning protection, Surge protection. |
Disclaimer
Product names and brand names may be registered trademarks of their respective manufacturers. TM and ® symbols may be omitted in this manual. The illustrations are for reference only. The company reserves the right to make changes to the product or system described herein without prior notice to improve reliability, function, or design.
