LENKENG LKV422 4×2 HDMI Matrix Switch User Manual
- June 9, 2024
- LENKENG
Table of Contents
LENKENG LKV422 4×2 HDMI Matrix Switch User Manual
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 device 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 third-party power supply is used, please ensure that the power supply specifications meet the product requirements
Introduction
This is a 4-in 2-out HDMI matrix switch, which can switch 4 HDMI input signals to 2 HDMI displays as required. It supports up to 4096×2160@60Hz HDR resolution, with multiple switching methods (IR remote control, buttons, RS-232) to flexibly match input and output devices. HDMI outputs supportauto down-scaling. Additional audio output is supported through the S/PDIF port and stereo jack. This device is a reliable, ultra-high-definition video transmission solution widely used in security monitoring, education and training, exhibition and broadcasting, command center, and other scenarios.
Features
- Support 4 HDMI input and 2 HDMI output
- Support up to 4096×2160@60Hz resolution and is backward compatible
- Support HDR10
- Support multiple switching mode: IR remote control, buttons, RS-232
- Support additional audio output from stereo jack and S/PDIF port
- HDMI outputs support auto down-scaling
- Lightning protection, surge protection, ESD protection
Package Contents
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Matrix switch x1
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Power adapter 5V/1A x1
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User manual x1
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Remote control x1
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Mounting ear x2
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Screw x6
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Grounding screw x2
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Terminal block x1
Installation Requirements
- HDMI source device (DVD, game console, PC, etc.)
- HDMI display device (TV, projector, LED screen, etc.)
Panel Description
| ① | Power input | Connect with DC 5V/1A power adapter |
|---|---|---|
| ② | Reset pinhole | Press the pinhole reset button with a straightened paper |
clip
③| HDMI output 1,2| Connect with HDMI display devices
④| HDMI input 1,2,3,4| Connect with HDMI source devices
⑤| S/PDIF out| Connect to the audio device with optical audio cable
⑥| 3.5mm L/R out| Connect to the audio device with stereo audio cable
⑦| RS-232| Used for RS-232 command control
⑧| Power indicator| The indicator will be solid yellow if there is power
⑨| Audio output indicator 1,2| Corresponding to the audio output of HDMI 1, 2
⑩| Audio switch| Audio output can be switched between HDMI 1, 2
11| IR window| Receive IR signal
12| HDMI input indicator 1,2,3,4| Corresponding to HDMI inputs 1,2,3,4
---|---|---
13| HDMI outputswitch 1,2| Choose an output from HDMI inputs 1,2,3,4
Remote Control
The remote control is used to switch inputs and outputs.
Installation Procedures
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Connection Diagrams
-
Connection Instructions
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Connect the source devices to the HDMI input ports with HDMI cables.
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Connect the display devices to the HDMI output ports with HDMI cables.
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If using RS-232 control, connect the control device to the RS-232 port.
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lf you need to output audio additionally, connect the audio device to the L/R port and/or S/PDIF port with stereo or optical audio cable.
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Power on the devices to get started.
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RS-232 control
- Baud rate: 9600
- Data bits: 8
- Stop bits:
- Parity: none
Operation mode one
| /| HDMI1 input| HDMI2 input| HDMI3 input|
HDMI4 input
---|---|---|---|---|---
HDMI1output| PS11R| PS12R| PS13R| PS14R
HDMI2output| PS21R| PS22R| PS23R| PS24R
HDMI1/2output| PA1R| PA2R| PA3R| PA4R
Operation mode two
| 
PAPXPXPA is the command prefix,
and the “X” of PX can be any number from 1 to 4; P1 represents HDMI 1 source
content for output, P2 represents HDMI 2 source content for output.E.g. PAP3P1
represents:Output port HDMI 1 outputs content from input port HDMI 3. Output
port HDMI 2 outputs content from input port HDMI 1.
Return value| PAXXR is the command to read the status of all
interfaces; after sending the command, OKPXPX is displayed, where X is 1 to 4;
if the command sent is incorrect, ERR appears.
Reset| Device restart
Recover| Restore device factory setting
BaudXX| Set baud rate value: 9600 (default), 19200
FAQ
Q: No video or audio signal output on the displays?
A：
- Make sure the matrix switch is powered on and all the cables are connected properly.
- Please check and make sure the input channel of displays are correct.
Q: Picture quality is not fluent and stable?
A：
- Please check and make sure all HDMI cables are connected firmly.
- Try to connect the source device to display device directly, or change to another source device for a try to see the picture quality if is improved.
- Please use high quality HDMI cable for 4K signal.
Specification
| Items | Description |
|---|---|
| HDMI version | HDMI 2.0（HDR, YUV444） |
Compatible with HDCP 2.2, HDCP 1.4
HDMI interface| 4 HDMI input, 2 HDMI output
Transmission rate| 18Gbps
Resolutions| 480i@60Hz, 480p@60Hz, 576i@50Hz, 576p@50Hz,720p@50/60Hz,
1080i@50/60Hz,
1080p@50/60Hz,3840×2160@24/25/30/50/60Hz,4096×2160@24/25/30/50/60Hz
Audio format| LPCM7.1/DTS-HD/DTS-Audio/Dolby Digital plus/ Dolby TrueHD
7.1/Dolby Digital 7.1CH/Dolby Atmos
---|---
RS-232| 3 Pin (GND/Rx/Tx), Baud rate 9600
Voltage| DC 5V/1A
Power consumption| ＜4W
Working temperature| -20℃~60℃
Storage temperature| -30℃~70℃
Humidity| 0~90%RH (No Condensation)
Housing| Iron
Color| Black
Weight| 375g
Dimensions| 250.0(L) x 80.0(W) x 21.0(H) mm
Protection
| ESD protection1a 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 trademark of related manufactures. ™ and ® may be omitted on the user manual. The pictures in this user manual are just for reference. The terms HDMI, HDMI
High-Definition Multimedia Interface, and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing Administrator, Inc. We reserve the rights to make changes without further notice to a productor system described herein to improve reliability, function or design.