LINK-MI LM-MH31 User manual

USER MANUAL
LM-MH31
4K HDMI Switcher 3X1 with Audio Amplifier
Support PIP and MHL function

Introduction
4K HDMI Switcher 3X1
This HDMI switcher 3x1 allows 3 HDMI sources to be switched to a single display terminal by remote
control or buttons on switch.Support picture-in-picture (PIP ) video preview, which makes it simple and
intuitive to switch.The HDMI 1 input support HDMI/MHL dual-mode,available for the equipments with
MHL interface. The resolution of this HDMI switcher is 3840X2160/30Hz.
In addition, the switcher can strip audio signal from HDMI signal, output via optical fiber, coaxial, and 3.5
mm headphone.Support heavy bass,integrating Amplifier,let users enjoy the excellent audio experience.

Features:
Support HDMI1.4b
Support 3D video format
Support the resolution up to 3840X2160/30HZ
Support 3.2Gbps data rate for TMDS clock up to 320MHz
Support 8/10/12 bit deep color
Support 2.1 audio signal power amplifier,up to 30W
Support heavy bass
With headphone both input and output,which support 2.1 audio channel
With Optical and coaxial audio inputs,which support 5.1 audio channel
Optical audio input
Picture-in-picture (PIP ) function
Switched seamlessly, Switch one input source to the other quickly
Support HDMI/MHL dual-mode input
12V/5A power supply
Specifications:
HDMI version …………………………………………………........................…………………...….... HDMI 1.4b
HDMI resolution ………………………………...………...……..........................…...…up to 3840x2160/30Hz
Support video format ………………………………..………….………..…………....….... 8/10/12 bit deep color
Support audio format………………..………..….....…….....DTS-HD/Dolby-trueHD/DTS/Dolby-AC3/DSD
Max bandwidth…………………………………………………..........................………………………….…....320MHz
Max Baud rate……………….…….………………….…………...........................………………………..…....3.2Gbps
Input cable distance..…………(1080P mode)≤12M,(4K mode)≤10M AWG26 HDMI standard cable
Output cable distance……..…(1080P mode)≤20M,(4K mode)≤12M AWG26 HDMI standard cable
Max working current………………………………..............…..…………………………………….....…....…....2.38 A
Power adapter format ……………………….....Input:AC (50HZ, 60HZ) 100V-240V; Output: DC12V/5A
Operating temperature range…………………………..…………….………………….……………… (-15 to +55℃)
Dimension(L x W x H)…………...............………………………………...………….…………….167x103x25 (mm)
Weight…….…..………………………………………………………..……...............................………………………390g

Product Picture:
Physical interface diagram:

○
1
:SPEAKER: Amplifier output
○
2
:SUB OUT: heavy bass output
○
3
:R/L OUT：R/L audio output
○
4
:COAXIAL: coaxial audio output
○
5
:OPTICAL OUT: optical audio output
○
6
:OUTPUT：HDMI signal output
○
7
-○
9
:HDMI input
○
10
：OPTICAL IN：optical audio input
○
11
：R/L IN：R/L audio input
○
12
：IR: IR receiving head
○
13
-○
15
：operation buttons
○
16
：power indicator light
○
17
：power input
○
18
：signal input indicator lights
The product description:
Audio Power Amplifier ：signal sources are from 3 HDMI inputs,stereo audio input,and optical audio
input.The outputs include two channels(15W max power for each) and the heavy
bass output
Optical and coaxial audio outputs：the two audio signals stripped from HDMI input sources,support 5.1
audio channel
HDMI switch ：Support 3 HDMI sources to be switched to a single display terminal ，the MHL/HDMI1
input support both HDMI input and MHL input,HDMI2 and HDMI3 support
HDMI input only
Special features:
* Switched seamlessly:
Switch one input source to the other input source quickly.
With InstaPor technology, this product achieves seamless switching among input sources. and gets big
advantages compared to the previous switcher which needs to wait for a period of time in the switching
process.
* Picture-in-picture (PIP ) video preview
User can make an accurately switch via picture-in-picture (PIP ) video preview,no need to remember
the input signal source of each input.

Button operation instructions：
+/PIP Key: 1)short pressing,to adjust the audio power amplifier——Volume+.
2)long pressing about 5 seconds,appear PIP mode,via “select” button to choose the HDMI
inputs,and then press “+/PIP” for sure.
-/5.1H Key: Adjust audio power amplifier,— —volume-;When press this button about 5 seconds, can
switch the audio channel between 5.1 and 2.1.
SELECT Key: when in non-PIP mode ,for input resources selection and switch audio among R/L
input,optical input and the HDMI input from HDMI1~HDMI3.When in PIP
mode,switch the input resources only.
Remote control operation instructions：
2.1H Key：Switch 2.1 audio channel output
5.1H Key：Switch 5.1 audio channel output
Select Key：when in non-PIP mode,for input resources selection and switch
audio among R/L input,optical input and the HDMI input from
HDMI1~HDMI3
OK/PIP Key ：Press the key,it appears PIP mode,then choose HDMI inputs
through “CH+” and “CH- ” then confirm by “OK”
Volume Key：Adjust audio power amplifier, which means volume +/-
Bass Key：Adjust heavy bass volume +/-

Notes
1. When the Resolution is over 1080P,the switcher does not support PIP function
2. What this manual said “4K mode “ refers to a resolution higher than 1080P @ 60Hz
3.In the non-4k mode, when a new signal source put in, it will appear a new source of input preview on
the left of the screen
4.In PIP function, the 2 small screens are with fixed size on the left of the main screen
5.In PIP function, the position of each small picture is corresponding fixed with their input source（pic
1:1080P mode；pic 2:4K mode）
The package include:
1.HDMI switcher
2. Power adapter
3. User Manual
4. IR remote control