Leadshine Technology M880 User manual

User sManual
For
M880/M840
High PerformanceMicrostepping Driver
Version 1.0
2000 All RightsReserved
Attention: Please read thismanualcarefullybefore using the driver!
3/F, Block2, Nanyou Tianan IndustrialPark, Nanshan Dist, Shenzhen, China
T: (86)755-26434369F: (86)755-26402718
Website: www.leadshine.com E-Mail: [e-mail]
The contentinthismanualhas beencarefullypreparedand isbelievedtobeaccurate,butno
responsibilityisassumedforinaccuracies.
Leadshinereserves therighttomake changes withoutfurthernotice toanyproductshereinto
improvereliability,function ordesign.Leadshinedoes notassume anyliabilityarisingoutofthe
applicationoruse ofanyproductorcircuitdescribedherein;neitherdoes itconveyanylicense
underitspatentrightsofothers.
Leadshine sgeneralpolicydoes notrecommend theuse ofitsproductsinlifesupportoraircraft
applicationswhereinafailureormalfunction oftheproductmaydirectlythreatenlifeorinjury.
AccordingtoLeadshine stermsand conditionsofsales,theuserofLeadshine sproductsinlife
supportoraircraftapplicationsassumesall risksofsuchuse andindemnifies Leadshineagainstall
damages.
2000 byLeadshine TechnologyCompanyLimited.
All RightsReserved

Contents
I
Table ofContents
1. Introduction, Featuresand Applications....................................................................1
Introduction...........................................................................................................1
Features.................................................................................................................1
Applications..........................................................................................................1
2. Specifications............................................................................................................1
ElectricalSpecifications........................................................................................1
Operating Environmentand otherSpecifications..................................................2
MechanicalSpecifications.....................................................................................2
Elimination ofHeat...............................................................................................2
3. PinAssignmentand Description...............................................................................3
ConnectorP1Configurations................................................................................3
Selecting Active EdgeorAectiveLeveland ControlSignalMode.......................3
ConnectorP2Configurations................................................................................4
4. ControlSignalConnector(P1)Interface...................................................................4
5. Connecting the Motor................................................................................................5
Connectionsto 4-lead Motors...............................................................................5
Connectionsto 6-lead Motors...............................................................................5
Half Coil Configurations...............................................................................5
Full Coil Configurations................................................................................5
Connectionsto 8-lead Motors...............................................................................6
SeriesConnections........................................................................................6
ParallelConnections......................................................................................6
6. PowerSupplySelection............................................................................................7
Regulated orUnregulated PowerSupply..............................................................7
Multiple Drivers....................................................................................................7
Selecting SupplyVoltage.......................................................................................7
7. Selecting Microstep Resolution and DriverOutputCurrent.....................................8
Microstep Resolution Selection............................................................................8
CurrentSettings.....................................................................................................8
Dynamic currentsetting................................................................................9
Contents
II
Standstill currentsetting................................................................................9
8. Wiring Notes.............................................................................................................9
9. TypicalConnection..................................................................................................10
10. SequenceChart ofControlSignals.......................................................................10
11. Protection Functions..............................................................................................11
Over-voltage protection.......................................................................................11
Over-currentProtection.......................................................................................11
Short Circuit Protection.......................................................................................11
Wrong MotorConnection Protection..................................................................11
12. FrequentlyAsked Questions..................................................................................11
ProblemSymptomsand Possible Causes............................................................12
APPENDIX.................................................................................................................13
Twelve month limited warranty..........................................................................13
Exclusions...........................................................................................................13
Obtaining warrantyservice.................................................................................13
Warrantylimitations............................................................................................13

M880/M840 MicrosteppingDriverManual V1.0
Tel: [phone]WebSite: www.leadshine.com
1. Introduction, Features and Applications
Introduction
TheM880 andtheM840arehighperformance microsteppingdriversbasedon oneofthemost
advancedtechnologies intheworldtoday.Theyaresuitablefordriving2-phase and 4-phase
hybridsteppingmotors.Byusingadvancedbipolarconstant-currentchoppingtechnique,theycan
outputmorespeedand powerfromthesame motorcomparedwithtraditionaldrivers,suchas L/R
drivers.Its3-statecurrentcontroltechnologyallowscoil currenttobewell controlledwith
relativelysmall currentripple, thereforeless motorheatingisachieved.
Features
lHighperformance, lowcost
lSupplyvoltageup to+80VDC
lOutputcurrentupto7.8A(M880),3.9A
(M840)
lInaudible20KHzchoppingfrequency
lTTLcompatibleandopticallyisolatedinput
lAutomaticidle-currentreduction
lMixed-decaycurrentcontrolforless motor
heating
l14selectableresolutionsindecimaland
binary, up to51,200steps/rev
lSuitablefor2-phase and 4-phase motors
lOver-current, over-voltageprotection
lSmall size
Applications
Suitableforawiderangeofsteppingmotors,fromNEMAsize 17to43.It canbeusedinvarious
kindsofmachines,suchas X-Ytables,labelingmachines,lasercutters,engravingmachines,
pick-place devices,and soon.Particularlyadapttotheapplicationsdesiredwithlowvibration,high
speedand highprecision.
2. Specifications
ElectricalSpecifications (Tj=25 )
M880/M840
Parameters
Min Typical Max Unit
Outputcurrent 2.8/1.4 - 7.8/3.9 Amps
Supplyvoltage +24 +68 +80 VDC
Logicsignalcurrent 7 10 16 mA
Pulse inputfrequency 0 - 300 KHz
Isolationresistance 500 MΩ
M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
Operating Environmentand otherSpecifications
Cooling NaturalCoolingorForcedcooling
Environment Avoiddust, oilfogand corrosivegases
AmbientTemperature 0 －50
Humidity 40%RH －90%RH
OperatingTemperature 70Max
OperatingEnvironment
Vibration 5.9m/s2 Max
StorageTemperature -20 －65
Weight Approx. 440g(15.50oz)/M880;330 g(11.60 oz)/M840
MechanicalSpecifications (unit:mm, 1 inch =25.4 mm)
Front viewSlideviewFrontviewSlideview
(a) M880(withheatsink)(b)M840(withoutheatsink)
Figure 1:Mechanicalspecifications
*Recommendusesidemountingforbetterheatdissipation
Elimination ofHeat
lDriver sreliableworkingtemperatureshouldbe<65,andmotorworkingtemperatureshould
be<80;
lIt isrecommendedtouse automaticidle-currentmode,namelycurrentautomaticallyreduce to
60%whenmotorstops, soas toreduce driverheatingandmotorheating;
lIt isrecommendedtomountthedriververticallytomaximize heatsinkarea.

M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
3. PinAssignmentand Description
TheM880 andtheM840 havetwoconnectors,connectorP1forcontrolsignalsconnections,and
connectorP2forpowerand motorconnections.Thefollowingtables arebriefdescriptionsofthetwo
connectors.Moredetaileddescriptionsofthepinsandrelatedissuesarepresentedinsection 4,5,9.
ConnectorP1Configurations
PinFunction Details
PUL+(+5V)
PUL-(PUL)
Pulse signal: Insinglepulse (pulse/direction)mode,thisinputrepresentspulse
signal,activeateachrisingorfallingedge(setbyinsidejumperJ1); 4-5V
whenPUL-HIGH,0-0.5VwhenPUL-LOW.Indoublepulse mode
(pulse/pulse),thisinputrepresentsclockwise(CW)pulse，activeathighlevel
orlowlevel(setbyinsidejumperJ1).Forreliableresponse,pulse width
shouldbelongerthan1.2μs.Series connectresistorsforcurrent-limitingwhen
+12Vor+24Vused.
DIR+(+5V)
DIR-(DIR)
DIR signal: Insingle-pulse mode,thissignalhas low/highvoltagelevels,
representingtwodirectionsofmotorrotation;indouble-pulse mode(setby
insidejumperJ2),thissignaliscounter-clock(CCW)pulse，activeforhigh
levelorlowlevel(setbyinsidejumperJ1).Forreliablemotionresponse,DIR
signalshouldbeaheadofPULsignalby5μsatleast.4-5VwhenDIR-HIGH,
0-0.5VwhenDIR-LOW.Please notethatmotiondirectionisalsorelatedto
motor-driverwiringmatch.Exchangingtheconnectionoftwowires foracoil
tothedriverwill reverse motion direction.
ENA+(+5V)
ENA-(ENA)
Enablesignal: Thissignalisusedforenabling/disablingthedriver.Highlevel
(NPNcontrolsignal,PNPandDifferentialcontrolsignalsareon thecontrary,
namelyLowlevelforenabling.)forenablingthedriverand lowlevelfor
disablingthedriver. Usuallyleft UNCONNECTED(ENABLED).
SelectActive Edge orActive Leveland ControlSignalMode
TherearetwojumpersJ1andJ2insidetheM880 and M840specificallyforselectingactivepulse
edgeoractivelevelandcontrolsignalmode,as showninfigure2.Default settingisPUL/DIR mode
and upward-risingedgeactive.
(a) J1,J2opencircuit(b)J1 shortcircuit,J2opencircuit
PUL/DIRmodeandactiveatupward-risingedgePUL/DIRmodeandactiveatdownward-fallingedge
(c)J1opencircuit,J2shortcircuit (d)J1,J2shortcircuit
CW/CCWmodeandactiveCW/CCWmodeandactive
athigh level(Thefixedlevel)atlow level(Thefixedlevel)
Figure 2:J1andJ2jumpers
M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
ConnectorP2Configurations
PinFunction Details
GND DC powerground.
+V DC powersupply,24~80VDC,Includingvoltagefluctuation and EMF
voltage.
A+,A- MotorPhase A
B+, B- MotorPhase B
4. ControlSignalConnector(P1)Interface
TheM880andtheM840canacceptdifferentialand single-endedinputs(includingopen-collector
and PNPoutput).TheM880andtheM840have3opticallyisolatedlogicinputswhicharelocatedon
connectorP1toacceptlinedrivercontrolsignals.These inputsareisolatedtominimizeoreliminate
electricalnoises coupledontothedrivecontrolsignals.Recommenduse linedrivercontrolsignalsto
increase noise immunityofthedriverininterference environments.Inthefollowingfigures,
connectionstoopen-collectorand PNPsignalsareillustrated.
Figure 3:Connectionstoopen-collectorsignal(common-anode)
Figure 4:ConnectiontoPNPsignal(common-cathode)

M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
5. Connecting theMotor
TheM880andtheM840 candriveany2-pahse and 4-pahse hybridsteppingmotors.
Connectionsto4-lead Motors
4leadmotorsaretheleastflexiblebuteasiesttowire.Speedandtorquewill dependonwinding
inductance.Insettingthedriveroutputcurrent,multiplythespecifiedphase currentby1.4to
determinethepeakoutputcurrent.
Figure 5:4-leadMotorConnections
Connectionsto6-lead Motors
Like8leadsteppingmotors,6leadmotorshavetwoconfigurationsavailableforhighspeedorhigh
torqueoperation.Thehigherspeedconfiguration,orhalfcoil,issodescribedbecause it uses onehalf
ofthemotor sinductorwindings.Thehighertorqueconfiguration,orfull coil,uses thefull windings
ofthephases.
Half Coil Configurations
Aspreviouslystated,thehalfcoil configuration uses 50%ofthemotorphase windings.Thisgives
lowerinductance, hence,lowertorqueoutput.Liketheparallelconnection of8leadmotor,thetorque
outputwill bemorestableathigherspeeds.Thisconfigurationisalsoreferredtoas halfchopper.In
settingthedriveroutputcurrentmultiplythespecifiedperphase (orunipolar)currentratingby1.4to
determinethepeakoutputcurrent.
Figure 6:6-leadmotorhalfcoil(higherspeed)connections
Full Coil Configurations
Thefull coilconfigurationonasixleadmotorshouldbeusedinapplicationswherehighertorqueat
lowerspeedsisdesired.Thisconfiguration isalsoreferredtoasfull copper.Infullcoilmode,the
M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
motorsshouldberunatonly70%oftheir ratedcurrenttopreventoverheating.
Figure 7:6-leadmotorfull coil(higher torque) connections
Connectionsto8-lead Motors
8leadmotorsofferahighdegree offlexibilitytothesystemdesignerinthattheymaybeconnected
inseries orparallel, thussatisfyingawiderangeofapplications.
Series Connections
Aseriesmotorconfigurationwouldtypicallybeusedinapplicationswhereahighertorqueatlower
speedsisrequired. Because thisconfiguration has themostinductance, theperformance will start to
degradeathigherspeeds. Inseries mode, themotorsshouldalsoberunatonly70%oftheir rated
currenttopreventoverheating.
Figure 8:8-leadmotorseriesconnections
ParallelConnections
An8leadmotorinaparallelconfiguration offersamorestable, butlowertorqueatlowerspeeds. But
because ofthelowerinductance,therewill behighertorqueathigherspeeds.Multiplytheperphase
(orunipolar)currentratingby1.96,orthebipolarcurrentratingby1.4,todeterminethepeakoutput
current.
Figure 9:8-leadmotorparallelconnections

M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
6. PowerSupply Selection
TheM880and theM840canmatchmediumand small size steppingmotors(fromNema size 17 to
43)madebyLeadshineorothermotormanufactures around theworld.Toachievegood driving
performances,it isimportanttoselectsupplyvoltageand outputcurrentproperly.Generallyspeaking,
supplyvoltagedetermines thehighspeedperformance ofthemotor,whileoutputcurrentdetermines
theoutputtorqueofthedrivenmotor(particularlyatlowerspeed).Highersupplyvoltagewill allow
highermotorspeedtobeachieved,attheprice ofmorenoiseand heating.Ifthemotion speed
requirementislow,it sbettertouse lowersupplyvoltagetodecrease noise,heatingandimprove
reliability.
Regulated orUnregulated PowerSupply
Bothregulatedandunregulatedpowersupplies canbeusedtosupplythedriver.However,
unregulatedpowersupplies arepreferredduetotheirabilitytowithstandcurrentsurge.Ifregulated
powersupplies (suchas mostswitchingsupplies.)areindeedused,it isimportanttohavelarge
currentoutputratingtoavoidproblemslikecurrentclamp,forexampleusing4Asupplyfor3A
motor-driveroperation. Ontheotherhand, ifunregulatedsupplyisused, onemayuse apowersupply
oflowercurrentratingthanthatofmotor(typically50%～70%ofmotorcurrent).Thereason isthat
thedriverdrawscurrentfromthepowersupplycapacitoroftheunregulatedsupplyonlyduringthe
ON durationofthePWMcycle,butnotduringtheOFF duration.Therefore,theaveragecurrent
withdrawnfrompowersupplyisconsiderablyless thanmotorcurrent.Forexample,two3Amotors
canbewell suppliedbyonepowersupplyof4Arating.
Multiple Drivers
It isrecommendedtohavemultipledriverstoshareonepowersupplytoreduce cost,ifthesupply
has enoughcapacity.Toavoidcross interference, DONOT daisy-chainthepowersupplyinputpins
ofthedrivers. (Instead,please connectthemtopowersupplyseparately.)
Attention: NEVERconnectpowerand groundinthewrongdirection,as itwill damagetheM880or
theM840.
Selecting SupplyVoltage
ThepowerMOSFETSinsidetheM880andtheM840 canactuallyoperatewithin+24V～+80VDC,
includingpowerinputfluctuationand backEMF voltagegeneratedbymotorcoilsduringmotorshaft
deceleration.Highersupplyvoltagecanincrease motortorqueathigherspeeds,thushelpfulfor
avoidinglosingsteps.However,highervoltagemaycause biggermotorvibrationatlowerspeed,and
it mayalsocause over-voltageprotectionorevendriverdamage.Therefore,it issuggestedtochoose
onlysufficientlyhighsupplyvoltageforintendedapplications,and it issuggestedtouse power
supplies withtheoreticaloutputvoltageof+24～+75V,leavingroomforpowerfluctuation and
M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
back-EMF.
7. Selecting MicrostepResolutionand DriverOutputCurrent
Thisdriveruses an8-bitDIPswitchtosetmicrostepresolution,andmotoroperatingcurrent,as
shownbelow:
Microstep Resolution Selection
Microstepresolution issetbySW5, 6, 7, 8oftheDIPswitch as showninthefollowingtable:
Microstep Steps/rev.(for1.8°motor) SW5 SW6 SW7 SW8
2 400 ON ON ON ON
4 800 ON OFF ON ON
8 1600 ON ON OFF ON
16 3200 ON OFF OFF ON
32 6400 ON ON ON OFF
64 12800 ON OFF ON OFF
128 25600 ON ON OFF OFF
256 51200 ON OFF OFF OFF
5 1000 OFF ON ON ON
10 2000 OFF OFF ON ON
25 5000 OFF ON OFF ON
50 10000 OFF OFF OFF ON
125 25000 OFF ON ON OFF
250 50000 OFF OFF ON OFF
CurrentSettings
Foragivenmotor,higherdrivercurrentwill makethemotortooutputmoretorque,butatthesame
timecausesmoreheatinginthemotoranddriver.Therefore,outputcurrentisgenerallysettobesuch
thatthemotorwill notoverheatforlongtimeoperation.Since parallelandserialconnectionsof
motorcoilswill significantlychangeresultinginductance andresistance,itisthereforeimportantto
setdriveroutputcurrentdependingonmotorphase current,motorleadsandconnectionmethods.
Phase currentratingsuppliedbymotormanufacturerisimportantinselectingdrivercurrent, however
theselection alsodependson leadsand connections.
Thefirstthree bits(SW1,2,3)oftheDIPswitchareusedtosetthedynamiccurrent.Selectasetting

M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
closesttoyourmotor srequiredcurrent.
Dynamiccurrentsetting
CurrentforM840 CurrentforM880 SW1 SW2 SW3
1.4A 2.8A ON ON ON
1.8A 3.5A OFF ON ON
2.1A 4.2A ON OFF ON
2.5A 4.9A OFF OFF ON
2.9A 5.7A ON ON OFF
3.2A 6.4A OFF ON OFF
3.5A 7.0A ON OFF OFF
3.9A 7.8A OFF OFF OFF
Notes: Duetomotorinductance,theactualcurrentinthecoilmaybesmallerthanthedynamic
currentsetting,particularlyunderhighspeedcondition.
Standstill currentsetting
SW4isusedforthispurpose.OFFmeaningthatthestandstillcurrentissettobehalfoftheselected
dynamiccurrent,and ON meaningthatstandstill currentissettobethesameas theselecteddynamic
current.
Thecurrentautomaticallyreducedto60%oftheselecteddynamiccurrentonesecond afterthelast
pulse.Theoretically,thiswill reduce motorheatingto36%(duetoP=I2*R) oftheoriginalvalue.If
theapplicationneedsadifferentstandstillcurrent,please contactLeadshine.
8. Wiring Notes
lInordertoimproveanti-interference performance ofthedriver,itisrecommendedtouse
twistedpair shieldcable.
lTopreventnoise incurredinPUL/DIR signal,pulse/direction signalwires and motorwires
shouldnotbetieduptogether.Itisbettertoseparatethembyatleast10 cm,otherwise the
disturbingsignalsgeneratedbymotorwill easilydisturbpulse direction signals,causingmotor
positionerror, systeminstabilityand otherfailures.
lIfapowersupplyserves severaldrivers,separatelyconnectingthedriversisrecommended
insteadofdaisy-chaining.
lIt isprohibitedtopull andplugconnectorP2whilethedriverispoweredON,because thereis
highcurrentflowingthroughmotorcoils(evenwhenmotorisatstandstill). Pullingorplugging
connectorP2withpoweron willcause extremelyhighback-EMFvoltagesurge,whichmay
damagethedriver.
M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
9. TypicalConnection
Acompletesteppingsystemshouldincludesteppingmotor,steppingdriver,powersupplyand
controller(pulse generator).Atypicalconnectionisshownas figure10.
Figure 10: Typical connection
10. Sequence Chart ofControlSignals
Inordertoavoidsomefault operationsanddeviations,PUL,DIR and ENAshouldabidebysome
rules, shownas followingdiagram:
Figure 11:Sequencechartofcontrol signals
Remark:
a) t1:ENAmustbeaheadofDIR byatleast5ms.Usually,ENA+and ENA-areNC (not
connected).See “ConnectorP1Configurations”formoreinformation.

M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
b) t2:DIR mustbeaheadofPULactiveedgeby5mstoensurecorrectdirection;
c) t3:Pulse widthnotless than1.2ms;
d) t4:Lowlevelwidthnotless than1.2ms.
11. ProtectionFunctions
Toimprovereliability, thedriverincorporates somebuilt-inprotectionsfeatures.
Over-voltage protection
Whenpowersupplyvoltageexceeds+96VDC,protection will beactivatedand powerindicatorLED
will turnred. Whenpowersupplyvoltageislowerthan+22VDC,thedriverwill notworksproperly.
Over-currentProtection
Protectionwill beactivatedwhencontinuouscurrentreaches to14A.
ShortCircuit Protection
Protectionwill beactivatedincaseofshort circuitbetweenmotorcoilsorbetweenmotorcoil andground.
Wrong MotorConnectionProtection
Protectionwill beactivatedwhenthemotorisconnectedinawrongway.
Whenaboveprotectionsareactive,themotorshaftwill befreeortheLEDwill turnred.Resetthe
driverbyrepoweringit tomakeit functionproperlyafterremovingaboveproblems.
Attention:Since thereisno protectionagainstpowerleads(﹢,﹣)reversal,it iscriticaltomake
surethatpowersupplyleadscorrectlyconnectedtodriver.Otherwise,thedriverwill bedamaged
instantly.
12. FrequentlyAskedQuestions
Intheeventthatyourdriverdoesn toperateproperly,thefirststepistoidentifywhethertheproblem
iselectricalormechanicalinnature.Thenextstepistoisolatethesystemcomponentthatiscausing
theproblem.Aspart ofthisprocess you mayhavetodisconnecttheindividualcomponentsthatmake
up yoursystemand verifythattheyoperateindependently.It isimportanttodocumenteachstepin
thetroubleshootingprocess.You mayneedthisdocumentation toreferbacktoatalaterdate,and
these detailswill greatlyassistourTechnicalSupport staffindeterminingtheproblemshouldyou
needassistance.
M880/M840MicrosteppingDriverManualV1.0
Tel: [phone]WebSite: www.leadshine.com
Manyoftheproblemsthataffectmotioncontrolsystemscanbetracedtoelectricalnoise,controller
softwareerrors, ormistakeinwiring.
ProblemSymptomsand Possible Causes
Symptoms PossibleProblems
Nopower
Microstepresolution settingiswrong
DIPswitchcurrentsettingiswrong
Fault conditionexists
Motorisnotrotating
Thedriverisdisabled
Motorrotates inthewrongdirection
Motorphases maybeconnectedinreverse
DIPswitchcurrentsettingiswrong
Thedriverinfault Somethingwrongwithmotorcoil
Controlsignalistooweak
Controlsignalisinterfered
Wrongmotorconnection
Somethingwrongwithmotorcoil
Erraticmotormotion
Currentsettingistoosmall, losing steps
Currentsettingistoosmall
Motorisundersizedfortheapplication
Acceleration issettoohigh
Motorstallsduringacceleration
Powersupplyvoltagetoo low
Inadequateheatsinking/cooling
Automaticcurrentreduction function notbeingutilized
Excessivemotoranddriverheating
Currentissettoohigh

M880/M840 MicrosteppingDriverManual V1.0
Tel: [phone]WebSite: www.leadshine.com
APPENDIX
Twelve month limited warranty
LeadshineTechnologyCo., Ltd.warrantsitsproductsagainstdefectsinmaterialsand
workmanshipforaperiodof12monthsfromshipment outoffactory.Duringthewarrantyperiod,
Leadshinewill either, atitsoption, repair orreplace productswhichprovedtobedefective.
Exclusions
Theabovewarrantydoes notextendtoanyproductdamagedbyreasonsofimproperorinadequate
handlingsbycustomer,improperorinadequatecustomerwirings,unauthorizedmodification or
misuse,oroperation beyond theelectricalspecificationsoftheproductand/oroperation beyond
environmentalspecificationsfortheproduct.
Obtaining warranty service
Toobtainwarrantyservice,areturnedmaterialauthorization number(RMA)mustbeobtained
fromcustomerservice ate-mail: [e-mail] beforereturningproductforservice.
Customershall prepayshippingcharges forproductsreturnedtoLeadshineforwarrantyservice,
and Leadshineshallpayforreturnofproductstocustomer.
Warranty limitations
Leadshinemakes no otherwarranty,eitherexpressedorimplied,withrespecttotheproduct.
Leadshinespecificallydisclaimstheimpliedwarranties ofmerchantabilityand fitness fora
particularpurpose.Somejurisdictionsdonotallowlimitationsonhowlongandimpliedwarranty
lasts, sotheabovelimitation orexclusion maynotapplytoyou. However, anyimpliedwarrantyof
merchantabilityorfitness islimitedtothe12-monthdurationofthiswrittenwarranty.
Shipping failed product
Ifyourproductfail duringthewarrantyperiod,e-mail customerservice at [e-mail] to
obtainareturnedmaterialauthorizationnumber(RMA)beforereturningproductforservice.
Please includeawrittendescriptionoftheproblemalongwithcontactnameand address.Send
failedproducttodistributorinyourarea or: LeadshineTechnologyCo., Ltd.Floor3,Block2,
Nanyou TiananIndustrialPark,NanshanDist,Shenzhen,China. Alsoenclose information
regardingthecircumstances priortoproductfailure.