LENKENG LKV422 4×2 HDMI Matrix Switch User Manual

June 9, 2024
LENKENG

LENKENG LKV422 4×2 HDMI Matrix Switch User Manual
LENKENG LKV422 4x2 HDMI Matrix Switch

Important Safety Instructions

  1. To prevent electric shock, please ensure that all devices are properly grounded.
  2. Do not place this device near or over a radiator or heat register, or where it is exposed to direct sunlight.
  3. Place the device in a well-ventilated area, do not block any ventilation openings.
  4. 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.
  5. Do not place the device on an uneven or unstable surface. The device may fall resulting in a malfunction.
  6. Never insert anything metallic into the open parts of this device. This may cause a danger of electric shock.
  7. The device should be repaired only by a qualified technician.
  8. 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

  1. Support 4 HDMI input and 2 HDMI output
  2. Support up to 4096×2160@60Hz resolution and is backward compatible
  3. Support HDR10
  4. Support multiple switching mode: IR remote control, buttons, RS-232
  5. Support additional audio output from stereo jack and S/PDIF port
  6. HDMI outputs support auto down-scaling
  7. Lightning protection, surge protection, ESD protection

Package Contents

  • Matrix switch x1

  • Power adapter 5V/1A x1

  • User manual x1

  • Remote control x1

  • Mounting ear x2

  • Screw x6

  • Grounding screw x2

  • Terminal block x1

Installation Requirements

  1. HDMI source device (DVD, game console, PC, etc.)
  2. HDMI display device (TV, projector, LED screen, etc.)

Panel Description

Panel Description

Power input Connect with DC 5V/1A power adapter
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

  1. Connection Diagrams
    Installation Procedures

  2. Connection Instructions

  3. Connect the source devices to the HDMI input ports with HDMI cables.

  4. Connect the display devices to the HDMI output ports with HDMI cables.

  5. If using RS-232 control, connect the control device to the RS-232 port.

  6. 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.

  7. Power on the devices to get started.

  8. 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

| Installation Procedures 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:

  1. Make sure the matrix switch is powered on and all the cables are connected properly.
  2. Please check and make sure the input channel of displays are correct.

Q:   Picture quality is not fluent and stable?
A:

  1. Please check and make sure all HDMI cables are connected firmly.
  2. 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.
  3. 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.

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