Helmer BM212 Simple manual

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ManualInstructions
BM212
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Contents
SafetyInformation
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Chapter1:Understandingyouramplifier
1.1Features
1.2PackageContent
1.3WiringInstruction
1.4DeviceLayout
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Chapter2:Installation
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Chapter3:GettingStarted
3.1Display
3.2TurnON/OFFthedevice
3.3Setting
3.4Musiclibrary
3.5Bluetooth
3.6ModifyBluetoothnameandpassword
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Chapter4:TechnicalParameters

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SafetyInformation
1.Don’tusethisproductinawetenvironment.
2.TheproductappliestopowersupplyAC100‐250V,ifyoudon'tuseitfora
longtime,pleaseturnoffthepower.
3.Pleasemakesurethatthespeakerline,powerline,audioinputlineare
connectedcorrectly.
4.Don’topenandrepairtheproductbyyourself.
5.Iftheproductcrashes,youcanpresstheresetbuttoninthelowerleft
corneroftheproducttoreset.
Chapter1:Understandingyouramplifier
1.1Features
1.2.8‐inchresistivetouchscreen.
2.StereoAmplifierModule(2x20Wmax)
3.Bluetoothconnectivityforwirelessaudioinputofsmartphone,pad,etc.
4.AdjustableBluetoothnameandpasswordviaUSBbyRS485.
5.1xWiredAudioInput(onrearPCB)
6.TFcardplayer(atbackofunit)
7.Settimetoturnondevicewithmusicplaying.
8.SupportMP3,WMA,APE,FLAC,ACC,etcformat.
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1.2PackageContent
1xamplifier
2xscrewsformounting
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1.3WiringDiagram
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1.4DeviceLayout
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Chapter2:Installation
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Chapter3:QuickStart
3.1Display
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PLAY/PAUSE:PutTFcardindevice,defaultmodeispauseondevice.Presstoplay.
PLAYMODE:Allrepeat,playinorder,shuffle,repeatone.
PREVIOUSSONGNEXTSONG
VOLUMEUPVOLUMEDOWN
BLUETOOTH:Pairwithyourmobile/padtoplaymusicfromyourmobile/pad.
SETTING:SetwithMusiclibrary,touchscreencalibration,backlight,audioinput,
language,poweronplay
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3.2TurnON/OFFthedevice
LongpressON/OFFbuttonondevicetoturnonoroffthedevice. 
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3.3Setting

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1.Other:ItshowsallthesongsinTFcard.
2.TouchCalibration:Press”+”onscreentoadjust.
3.Backlightstatus:toturnon/offthescreensavingpage.
4.AUX:tochooseaudioinputtoplay
5.Language:tochangelanguage
6.Poweronplay:Enableordisablethefunction.
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3.4MusicLibrary
1.AllthesongsneedtobeattherootofTFcard.
2.SupportMP3,WAV,APE,FALC,AAC,etcformat
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3.5Bluetooth
EnterBluetoothfunction,searchBluetoothnameinyourmobile/pad.
Thedefaultnameis8888.Pairwithit.Thedefaultpasswordis8888.
Playmusicfrommobileorpaddirectly.
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3.6ModifyBluetoothnameandpassword
Bluetoothmodificationinstructions:use485toolstomodifytheBluetooth
nameandpassword:485logicprotocolanalysis
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1.Eachcommunicationtosendastringofdata,packetheader,data,frame
tail.Asfollows:
StartcharacterIDnumberDataLengthPacketCheckCodeEndCharacter
1byte2bytes1byte<12bytes1byte1byte
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2.Startcharacter(1bit)IDnumber(2bits)Datalength(1bit)Packet
(instruction+parameter)(Lessthan12bits)Checkcode(1bit)Endcharacter
(1bit)
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Checkbit(andcheck)=IDnumber+datalength+datainstruction+
parameter
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3.HostIDmodification
FA0000036A+0002(IDtobemodified)6FFE
StartcharacterIDnumberdatalengthinstruction+packet(lessthan12
bytes)  checkcode  endcharacter
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4.BluetoothModificationNameandPassword:FormatUnicode
SettheBluetoothname:
FA00000570+41424344(Nametobemodified)F9FE
StartcharacterIDnumberdatalengthinstruction+packet(lessthan12
bytes)   checkcode   endcharacter
SettheBluetoothpassword:
FA00000572+41424344(Passwordtobemodified)F9FE
StartcharacterIDnumberdatalengthinstruction+packet(lessthan12
bytes)  checkcode  endcharacter
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Chapter4:TechnicalParameters
2.8‐inchresistivetouchscreen 
PowerSupply:AC100‐240V
OutputPower:20W+20W(Max)
InputImpedance:10KΩ
OutputImpedance:4‐8Ω
THD:0.03%
Frequencyresponse:20Hz‐20KHz
BluetoothTransmissionDistance:≤15M
Productsize:86x86x42mm