LRP electronic iX8 User manual

Specifications
USER MANUAL
Connections & Explanations
Installation Guide
Calibrate Speed-Control to Radio
USB Software Updateability
Multi Protection System 3
• Positionthespeed-controlwhereisprotectedintheeventofacrashandgivesyoueasyaccesstotheconnec-
torsandbuttons.
• Mountthespeedousingthesuppliedthick/blackdoubled-sidedtape
• Makesurethereisenoughclearancebetweenthespeed-control,power-wires,antennaandreceiver.Avoid
anydirectcontactbetweenpowercomponents,thereceiverortheantennaasthiscancauseinterference.If
interferenceoccurs,positionthecomponentsatadifferentplaceinthemodel.
• Theaerialshouldberunverticallyupandawayfromthereceiver.Avoidcontactwithanypartsmadeofcarbon
fibreormetal.Iftheaerialistoolong,don’tcoiluptheexcesslength.Seealsotheinstructionssuppliedwith
yourradiocontrolsystem.
Receiver & Switch Connecting Wires:TheiX8 isequippedwithpluggableLRPMulticonreceiverwire+plug-
gableswitchwire.Assupplied,itwilleasilyfitinallordinaryreceivers.Makesureyouconnectthereceiverwire
withcorrectpolarityandusechannel2.
Sensor Connector:Thebi-directionalmultipolesensorwireconnectsthespeed-controlandthemotor.Alwaysuse
thesensorwireanddonotalterormodifythiscable!Therearereplaceable/optionalhallsensorwiresavailable.
Throughthissensorconnector,theiX8canalsobeupdatedwiththelatestsoftwareupdatesusingtheoptional
„USBBridge#81800“.Pleaserefertochapter„USBSoftwareUpdateability“fordetails
Power Wires: Formaximumconvienceandperformance,theflexiblesiliconepowerwiresareaplug-indesign
usinghigh-power4.0mmpowersockets&connectors.Therearereplacementpowerwiresavailable,pleaserefer
tocompleteline-upatwww.LRP.cc.
Heatsink: Toachievebestperfomanceevenunderextremeconditions,theheatsinkisanintegralpartofthedesign
anddirectlyconnectedtothefets.Thisensuresthebestpossibleheattransferawayfromthespeed-control.
Plugged Cooling Fan:theiX8comeswithahigh-performancelow-profile(30x30x6mm)fan,protectioncoverand
mountingscrews.Thefancanbemountedontopoftheheatsinkandshouldbeusedfortoughapplicationsinhot
conditions.Itget‘spluggedintothe3-pinconnectoronthefront.
PureBrushlessCompetition yes ReverseMotorRotationMode yes
Forward/Brake yes X-Brake yes
Forward/Brake/Reverse yes Multi-Protection-System3 yes
Size 55x40mm Internal-Temp-CheckSystem3 yes
Height 25mm BlueLED yes
Weight(excl.wires) 62.0g PowerWires 3.3mm²+G4
VoltageInput 7.2-22.2V(2S-6S) USBSoftwareUpdateability yes
Typ.VoltageDrop*@20A 0.007V/phase PluggedFan yes
RatedCurrent* 600A/phase 4adjustableModes(ACS2,Drive
Select,Powerprofiles,Autobrake) yes
SwitchingBEC 6.0V/6.0A
TheiX8 comessuppliedwithflexible3.3mm²siliconepower-wiresandattached4.0mmbulletconnectors.Bevery
carefulwiththecorrectwiresequence/colorssinceanincorrectconnectionmaydamagethespeed-control!Avoid
creatingsolderbridgesonthesolder-tabsandisolateallconnectionscarefully.
 •Connectthespeed-controltothereceiver(position:Channel2
 •Bluepower-wire  SpeedoMOT.Atomotor„A“
 •Yellowpower-wire  SpeedoMOT.Btomotor„B“
 •Orangepower-wire  SpeedoMOT.Ctomotor„C“
 •Connectthehallsensorcabletothespeed-controlandthemotor.
 •Doublecheckallconnectionsbeforeconnectingthespeed-controltoabattery.
 Caution: Ifbatteryisconnectedwithreversedpolarityitwilldestroyyourspeed-control!
 •Redpower-wire  SpeedoBAT+tobattery„Plus“
 •Blackpower-wire  SpeedoBAT-tobattery„Minus“
Yourspeed-controlisnowreadytobeset-up.
RA00299 Version: 15.9.11
© LRP electronic GmbH 2011
*Transistorsratingat25°CjunctiontemperatureSpecificationssubjecttochangewithoutnotice.
LRP electronic GmbH
Wilhelm-Enssle-Str. 132-134
73630 Remshalden, Germany
[e-mail] - www.LRP.cc
iX8
Receiverwire
MODEbutton/LED
SETbutton/LED
On/Off-Switch
Motor„C“
OrangeWire
Motor„B“
YellowWire
Motor„A“
BlueWire
Battery+
RedWire
Battery-
BlackWire
Sensor
Connector
Fan
Connector
Insetupmodethespeed-controlstoreseverystep(e.g.learningyourradiosneutralandendpoints)bypressingthe
SETbutton.Allthesettingswillbestoredinthememoryevenifitwillbedisconnectedfromthebattery.
ThrottleTravel HighATV,EPA 100%
BrakeTravel LowATV,EPA,ATL 100%
ThrottleExponential EXP,EXPO startwith0
NeutralTrim SUBTrim centre
ServoReverse ThrottleReverse anysetting,don‘tchangeafterset-upprocedure!
TRANSMITTER SETTINGS: Setupthefollowingbasicfunctionsonyourtransmitter(ifavailable):
Ifyourtransmitterdoesn‘tofferanyofabovefunctions,it‘salreadyin„basicsetup“mode.
•Ensurethatthespeed-controlisnotconnectedtothedrivebatteryandisswitchedoff.
•Removemotorpinionorensurethatthewheelsofthemodelarefreetorotate.
•Switchthetransmitteronandsetthetransmitterthrottlesticktoneutral.
•Connectthespeed-controltothebatteryandswitchtheuniton.
•HoldtheSETbuttonpressedforatleast3sec.
YouenteredsetupmodeandtheSETLEDflashesblue(itwillflashuntilthesetupiscompleted).
•LeavetransmitterinneutralpositionandpresstheSETbuttononce.
Neutralsettingisstored,MODELEDflashesyellowandthemotorbeeps.
•HoldfullthrottleontransmitterandpresstheSETbuttononce.
Full-throttlesettingisstored,MODELEDflashesred.
•HoldfullbrakeontransmitterandpresstheSETbuttononce.
Brakesettingisstored,LED‘sglowred(MODE)andblue(SET).
• ThiscompletesthesetupprocedureandyouriX8 isreadytouse.
• Ifyoumakeamistakeduringthesetupprocedure,don‘tworry:Disconnectthebatteryforabout10secandstart
againfromthefirststep.
• Atthestartofeachrunswitchonthetransmitterfirst,thenswitchonthecar.
• Attheendofeachrunswitchofthecar,andthenswitchoffthetransmitter.
• Forstorageofthecar,disconnectthedrivebatteryatanytime!
   
Neutral -- off blue
Forward partial yellow off
full blue
Brake/Reverse partial red off
full blue
ChecktheLED‘swhenmovingthethrottleonyourradiotodoublecheckeverythingissetupcorrectly.
#80880
1/8th Brushless Competition
2S to 6S LiPo capability
6.0V / 6.0A Switching BEC
USB Software Updateability
ThankyouforyourtrustinthisLRPproduct.BypurchasingaLRP iX8 brushlessspeed-control,youhavechosen
oneofthe most advanced andsuccessfulspeed-controls oftoday. This speed-controlwith all of itshigh-tech
features and speciallyselectedelectronic components isoneofthebestspeed-controlscurrentlyavailable on
themarket.
 •PureBrushlessCompetition •USBSoftwareUpdateability
 •2Sto6Soperation •Fullyadjustable
 •6.0V/6.0ASwitchingBEC •AutoCellSystem2
 •Internal-Temp-CheckSystem3 •Multi-ProtectionSystem3
Pleaseread the followinginstructionscarefullybeforeyoustartusingyourspeedcontrol.Thisuser guide contains
importantnotesforthesafety,theuseandthemaintenanceofthisproduct.Thusprotectingyourselfandavoiddamages
oftheproduct.
Proceedaccordingtotheuserguideinordertounderstandyourspeedcontrolbetter.Pleasetakeyourtimeasyouwill
havemuchmorejoywithyourproductifyouknowitexactly.
Thisusermanualshallbekeptinasafeplace.Ifanothercustomerisusingthisproduct,thismanualhastobehanded
outtogetherwithit.
ThroughthesensorconnectortheiX8 canbeupdatedtothelatestfirmwareavailablefordownloadatwww.LRP.cc.
Theoptional„USBBridge-SpeedoFirmwareUpdate+PC-Link“(#81800)andaWindows-PCorMACarerequired
todoso,pleaserefertoLRPwebsiteandthemanualwhichcomeswiththeinterfaceforexactdetailshowtodo
softwareupdatestoyourspeed-control.
The same USB-Bridge can be used to update all the latest LRP speed-controls (80230, 80250, 80905, 80915,
80955,etc).Pleasecheckguideatww.LRP.ccforfurtherdetails.
Newandimprovedprotectionsystem„MPS3“whichalsoinformsyouthecauseoftheshutdownwithaspecial
LEDflashingsequence.YoucanindicatethatashutdownoccuredwhenblueSETLEDflashesveryfastandthe
„errorcode“(=causeforshutdown)isindicatedbytheMODELED‘sasexplainedintablebelow.
Error Code LED flashing sequences:





  
#1
Blue
(fast
flashing)
Yellow Speed-ControlThermalShutdown 1.toostrongmotorortoohighbatteryvoltageforapplication
2.insufficientcoolingofspeed-controlormotor.
3.toohighgearratio?
#2 Red MotorThermalShutdown
#3 Yellow/Red
(alternate) BatteryLowVoltageCut-Off
1.batteryemptyorwrongsettinginACS2?
2.batterydamaged?
3.motortoostrongforbatterydischargecapability?
4.poorconnection(badconnector,badsolderingjoint)?
#4 Yellow/Red
(sametime) MotorFailure 1.sensorwiremissingordefective?
2.drivetrainstuck?
3.motordefective(lockedrotor,damagedsensor)?
Active Fan Operation: thefanwillonlybecomeactiveaboveacertaintemperaturelevelofthespeed-control,
atinitialisation(turnonofthespeed-controlwithradioswitchedon)thefanwillrunfor3sectoindicateit‘scorrect
operation.
Internal-Temp-Check System 3:allowsyoutoread-outthemaximuminternaltemperaturethatthespeedo
andmotorhavereachedduringtherun.Youcanconvienentlyread-outthetemperaturebackinthepitssinceit
remainsstoreduntilyouturnitonthenexttimeregularly(whichwillresetthememory).Thisfeatureallowsyouto
accuratelycheckifallisrunningwellorifyou‘reclosetoshutdownalready.
How to read-out the temperature:
 switchat„OFF“position.
 keepMODEbuttonpressedwhileyouturnswitchto„ON“(thenreleasebutton).
 atfirstspeed-controltemperaturewillbeindicated.
 SETLEDwillstarttoflashblue(MODELED‘sareoff)....
 countthenumberofflashes.Thehigherthenumber,thehotterthespeedoran(shutdownoccursat10flashes).
 tochangetomotortemperatureread-out,pressMODEbuttononemoretime.
 SETLEDwillstarttoflashblue(MODELED‘sareoff)again,formotortheLED‘sontimewillbeshorter.
 countthenumberofflashes.Thehigherthenumber,thehotterthemotorran(shutdownoccursat10flashes).
 everyflashbelow10equalsto5°Ctemperaturedecrease.
Temperature chart (speed-control and motor temperature):



 Caution:motortemperatureread-outonlyworksifyourmotorhasabuilt-inNTCtemperaturesensor!
         
>-45°C
>-81°F
-40°C
-72°F
-35°C
-63°F
-30°C
-54°F
-25°C
-45°F
-20°C
-36°F
-15°C
-27°F
-10°C
-18°F
-5°C
-9°F
Shut-
down
Thecrossed-outwheeledbinmeansthatwithintheEuropeanUniontheproductmustbetaken
toseperatecollectionattheproductend-of-life.Donotdisposeoftheseproductsasunsorted
municipalwaste.

Mode.1 - AutoCell System 2 & SwitchingBEC
Special Features
Mode Programming
Troubleshooting Guide
Recommendations
Spare- & Optional-Parts
Mode.3 - Feel / Powerprofiles
Mode.2 - Drive Selection
Repair Procedures / Limited Warranty
Changing Mode Settings without the Transmitter:simplydisconnectthereceiverleadfromthereceiver
andchangetheMODEsettingsonthespeed-controlasdescribedunder„ModeProgramming“.
Works-Default-Settings: All LRPspeed-controls come factory-adjusted(defaultsare grey-shaded). If you
loosetrackofthemodes,youcanrestoretheworksdefaultsettingseasily.Withyourradioswitchedon,holdthe
SETbuttonpressedwhileyouswitchonthespeed-control.Thisreturnstheunittoourworksdefaultsettings.
Sensored Brushless Technology:AdvancedDigitalallowstheperfectknowledgeofthebrushlessmotor’s
magnetposition.ThisresultsinperfectmotorcontrolathighandlowRPM‘s,aswellasperfectbrakecontrol.
AutoCell System 2: ensuresthatallbatteriescanbeusedsafelyforallapplications,pleaseselectthecorrect
valueaccordingtoourtableunder„ModeProgramming“.Whenthebatteryvoltagereachestheselectedcut-off
voltage,themotorfunctionwillbedisabledandtheLED‘swillindicatethat the  shutdown has occureddueto
undervoltageofyourbatteries(seechapter„MultiProtectionSystem3“forfurtherdetails).
Switching BEC: strongestinit‘sclass,6.0V/6Ahighlyefficientoutputwhichpowerseventhestrongestdigital
servo‘sintheheaviestvehicles!
TheiX8 features4modeswhichenableyoutoadjustit100%toYOURrequirements.
• Howtogetinto„programmingthemodes“ PressMODEbuttonfor3ormoreseconds.
• Howtocheckthestoredvalues CountthenumberofflashesoftheblueSET-LED
   (*=value1|**=value2|etc.).
• Howtochangethevalue PressSETbuttontoincreasevaluebyonestep.
• HowtogettothenextMode PressMODEbuttononce.
• Howtoleavetheprogrammingmode IfyouareinMODE.4,presstheMODEbuttononemoretime,
  whichwillalsostorethesettings!
Important:donotturntheswitchoffbeforeleavingMode4(byonemorepressofMODEbutton)asotherwiseyourrecent
changeswon‘tbestoredinthememoryoftheiX8!
Tableofsettings,valuesandmodes:seebelow(grey-shadedvaluesshow„worksdefaultsettings“)
Mode.1 (ACS2): allowsyoutoadjustthecut-offvoltagepreciselydependingonthebatterytypeyouuse:
       
Yellow Cut-OffVoltage disabled 6.4V 9.6V 12.8V 16.0V 19.2V
useforLiPo 2S 3S 4S 5S 6S

Caution:WorksDefaultsettinghascut-offdisabled,makesureyouadjustthissettingbeforefirstuse!
Important:Usingvalue#0inthismodewillalsodisablethemotortemperaturecut-offfunction!
Mode.2 (Drive Selection): theiX8 canbeadjustedforallapplications,nomatterwhichmotorrotation
directionyouneed,ifyouwantreverse,electronicbrakesorneitheryoucansetitupaccordingly!
       

Reverse no yes no no yes no
Brake yes yes no yes yes no
MotorDirection CCW(normal) CW(reversed)
Mode.3 (Powerprofiles): allowsyoutoadjusttheiX8 to yourlikes.Eitheryourunonslipperyorhigh-
tractionsurfaces,wehaveincorporatedaprofileforyou!
Highervaluemeansmoreoverallpowerandmoreaggressivethrottleresponse.
     
Yellow/Red
(alternate) lowesttohighestpowersetting (value1=minimum/value5=maximum
Mode.4 (Automatic Brake):allowsyoutosetaslightbrakingactionwhenyourtriggerisinneutralrange.
      
Yellow/Red
(sametime) disabled lowesttohighestautomaticbrakesetting (value1=minimum/value5=maximum)
AllowsyoutoadjusttheiX8‘s feeling&characteristicstodifferentmotortypes,classes,numberofcells,race-
tracksandofcoursepersonalpreferences!
Ourworlds-winningprofileshavebeenalteredforthespecialrequirementsof1:8cars,buggy‘sandtruggy‘snow!
Depending on the status of the car (star t, acceleration, full speed) the software calculates the per fect motor
managementbyadjustingcurrentlimiter,throttlecurveandmore!Highervaluemeansmoreoverallpowerand
aggressiveresponse.
Weintegratedanactivecurrentlimitertoachievebestcarcontrolwithoutsacrifisingtopspeed,soyouhavevery
goodcontrolduringaccelerationbutalwaysreachthemaximumspeedyourmotoriscapableof.Thehigherprofile
youselectthemorebottomendpower&torqueyouwillachieve.
Caution:correctgearingiscrucialforgoodperformanceandahealthytemperatureofmotor,speed-controland
batteries.Whenmakingchangestogearing,batteryvoltage,motorormode3settingsyouneedtomonitormotor
temperaturesduringthefirstminutesofrunningcarefully.
Abrushlessmotorshouldneverexceedatemperatureof100°C(210°F).
X-Brake: Agoodstartingpointforthebrakesettingonyourradiois80%forallclasses.Makesureyoudothe
radio-setupwithallsettingsontheradioon100%anddecreasethemto80%afteryouhavecomplededthesetup.!
Drive Selection (Brake-, Reverse-Function and Motor Rotation Direction):theiX8 includesfully
adjustabledriveselection.Therequirementsandpreferencesfor1:8buggyandtruggy-brushlesssetupscanbe
ratherdifferentandthereforeweallowmaximumflexibility!
Youcandisablereverse,ifyou planonusingforward/brakeonly asyou‘reused tofromyournitro vehicle.But
addtionalyyoucanalsodisablethespeed-controlsbrakefunctionincaseyoupreferusingyourstandardnitrocars
brakesystemwithabrakeservo,forthatoperationyouneedaseparete„Y-wire“whichallowsyoutoconnectboth
thespeed-controlandthebrakeservotothereceiverschannel2.
Alsothereisreversed/CWmotorrotationmodeavailableformodelswithreversedgearboxwhichnormallycan
notuseasensoredbrushlesssystem.
Toeliminateallotherpossibilitiesor improperhandling,firstcheckallothercomponentsinyour modelandthe
troubleshootingguidebeforeyousendinthisproductforrepair.Ifproductsaresentinforrepair,whichdooperate
perfectly,wehavetochargeaservicefeeaccordingtoourpricelist.
AlwayscheckerrorbycheckingLEDerrorcodefirst,thisgivesyouagoodindicationweretosearch!
AllproductsfromLRPelectronicGmbH(hereinaftercalled“LRP”)aremanufacturedaccordingtothehighestqua-
litystandards.LRPguaranteesthisproducttobefreefromdefectsinmaterialsorworkmanshipfor90days(non-
europeancountrisonly)fromtheoriginaldateofpurchaseverifiedbysalesreceipt.Thislimitedwarrantydoesn’t
coverdefects,whicharearesultofmisuse,impropermaintenance,outsideinterferenceormechanicaldamage.
„Thisappliesamongotherthingson:
• Cutofforiginalpowerplugornotusingreversepolarityprotectedplugs
• Receiverwireand/orswitchwiredamaged
• Mechanicaldamageofthecase
• Humidity/Waterinsidethespeedcontrol
• Mechanicaldamageofelectronicalcomponents/PCB
• SolderedonthePCB(exceptonsolderpads)
• Connectedspeed-controlwithreversedpolarity“
Toeliminateallotherpossibilitiesorimproperhandling,firstcheckallothercomponentsinyourmodelandthe
troubleshootingguide,ifavailable,beforeyousendinthisproductforrepair.Ifproductsaresentinforrepair,which
dooperateperfectly,wehavetochargeaservicefeeaccordingtoourpricelist.
Withsendinginthisproduct,thecustomerhastoadviseLRPiftheproductshouldberepairedineithercase.If
thereisneitherawarrantynorguaranteeclaim,theinspectionoftheproductandtherepairs,ifnecessary,ineither
casewillbechargedwithafeeatthecustomersexpenseaccordingtoourpricelist.Aproofofpurchaseincluding
dateofpurchaseneedstobeincluded.Otherwise,nowarrantycanbegranted.Forquickrepair-andreturnservice,
addyouraddressanddetaileddescriptionofthemalfunction.
IfLRPnolongermanufacturesareturneddefectiveproductandweareunabletoserviceit,weshallprovideyou
withaproductthathasatleastthesamevaluefromoneofthesuccessorseries.
Thespecificationslikeweight,sizeandothersshouldbeseenasguidevalues.Duetoongoingtechnicalimpro-
vements,whicharedoneintheinterestoftheproduct,LRPdoesnottakeanyresponsibilityfortheaccuracyof
thesespecs.
LRP-Distributor-Service: 
• Packageyourproductcarefullyandincludesalesreceiptanddetaileddescriptionofmalfunction.
• SendparceltoyournationalLRPdistributor.
• Distributorrepairsorexchangestheproduct.
• ShipmentbacktoyouusuallybyCOD(cashondelivery),butthisissubjecttoyournationalLRPdistributor‘s
generalpolicy.
LRPoffersacomprehensivelineofaccessories,aswellasparticularspare-andoptionalitems.Hereyoufindan
overview,forafullpicturepleasevisitourwebsiteatwww.lrp.cc:
Optional parts:
#819307 Sensor-Wire„HighFlex“70mm
#819310 Sensor-Wire„HighFlex“100mm
#819315 Sensor-Wire„HighFlex“150mm
#819320 Sensor-Wire„HighFlex“200mm
#81907 3.3mm²Powerwireblack(1.0m)
#81908 3.3mm²Powerwireblue(1.0m)
#82506 Power-WireSetBrushless3.3mm²(red,black,blue,orange,yellow)
1/8th Brushless Motors:
#53230 Dynamic8BrushlessMotor1800kV
#53235 Dynamic8BrushlessMotor2000kV
#53240 Dynamic8BrushlessMotor2200kV
  
Motoroverheats Wrongnumberofcellsforyourmotor Decreasenumberofcells
WrongGearratio Adjustgearratio
Toolittlemotorcooling Addcoolingfanand/orheatsink
Insufficientperformance.
E.g.poorpower,topspeed
orbrake
WrongGearratio Adjustgearratio
Wrongnumberofcellsforyourmotor Adjustnumberofcells
Transmittersettingschangedafterset-up Repeatset-upprocedure
Motororsensor-boardinmotordefective Replacesensor-boardormotor
Speed-controldefective Sendinproductforrepair
Servoisworking,nomotor
function Speedopluggedinincorrectly PlugspeedotoreceiverasCh.2
MultiprotectionSystemactivated Checksettingsforyourapplication
Wiringproblem Checkwiresandconnectors
Sensorwiremissing/defective Install/replacesensorwire
Motordefective Replacemotor
Speedodefective Sendinproductforrepair
Noservoandnomotor
function Speedoconnectedtoreceiverwithwrongpolarity Connectspeedowithcorrectpolarity
Wiringproblem Checkwiresandconnectors
Batterydefective Replacewithdifferentbatterypack
Crystal,receiverortransmitterdefective Replacecomponentsonebyone
Speedodefective Sendinproductforrepair
Motorstutterswhile
accelerating Sensorwiredefective Replacesensorwire
Motororsensorboardinmotordefective Replacesensorboardormotor
Radiointerference Changelocationofcomponents
Speedodefective Sendinproductforrepair
Motorrunsinreversewhen
acceleratingforwardonradio Modelwithreversedgearbox! ChangesettingsinMode.2(CCW+CCW motorrotationdirection)
Speed-controlswitchesoff
frequently WrongsettinginACS2(Mode.1)! ChangevalueofACS2(Mode.1)accordingly
Speed-Controloverheats Addcoolingfantospeed-control
Modelusedtoooftenwithoutcool-downperiods Letcooldownaftereveryrun
Motortoostrongforinputvoltage UselowerkVmotororlowernumberofcells
Stuckdrivetrainorball-bearing Maintainmodel
Motordefective Replacemotor
Motorneverstops,runsat
constantslowspeed Transmittersettingschangedafterset-up Repeatset-upprocedure
Humidity/waterinspeedo Immediatelyunpluganddryspeedo
Motororsensorboardinmotordefective Replacesensorboardormotor
Radiointerference Receiverorantennatooclosetopowerwires,
motor,batteryorspeedo.Receiveraerialtooshort
orcoiledup
See„InstallationTips“and„Installation“
Receiverdefective,toosensitive;
Transmitterdefective,transmitteroutputpower
toolow,servoproblem
Replacecomponentsonebyone
Onlyuseoriginalmanufacturerscrystals
Poorbatteryconnection Checkplugsandconnectingwires
Transmitterbatteriesempty Replace/rechargetransmitterbatteries