JR Racing XR2 User manual

2 Channel, 2 Model Memory
AM Computer Racing System
JR XR-2 7/15/99 8:35 AM Page 1

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LithiumBattery 9
MemoryBackupScreen 9
AccessingtheSystemMode 10
ModelNameEntry 10
DataReset 11
AccessingtheFunctionMode 12
ModelSelect 13
TravelAdjust 14
SteeringRate 15
Sub-Trim 16
ServoReversing 17
AccessingtheDirect 18
TrimMode
SteeringTrim 19
ThrottleTrim 19
SteeringDualRateTrim 20
Adjustment(GripLeverB)
BrakeEndpointAdjustment 21
BRG(GripLeverA
ThrottleTravelAdjust)
XR-2DataSheet 22
FrequencyChart 22
Warrantyand 23
ServiceInformation
Introductionto 2
theXR-2RadioSystem
XR-2QuickStartSetup 3
SystemsFeatures 4
TransmitterFeatures 4
ReceiverFeatures 4
ServoFeatures 4
SystemSpecifications 4
SystemComponents 4
TransmitterSpecifications 4
ReceiverSpecifications 4
ServoSpecifications 4
ControlIdentification 5
andLocation
SteeringTensionAdjustment 6
ChargingJack 6
R/CSafetyPrecautions 6
Receiver/ServoConnections 7
andInstallation
OperatingYourModel 8
ServoLayout 8
KeyInputandDisplay 8
DisplayScreens 9
NormalDisplayScreen 9
LowBatteryScreen 9
Table of Contents
Introduction to the XR-2
Radio System
ThankyouforpurchasingtheXR-2two-channelradiosys-
tem.ThissystemhasbeendesignedtoprovidetheR/Cracer
withahighquality,userfriendlyradiosystemthatcanbe
dependeduponyearafteryear,raceafterrace.Itisimportant
thatyoucarefullyreadthismanualbeforeattemptingto
operateyourXR-2system.Foryourconvenience,ablank
datasheethasbeenincludedinthebackofthismanual.
Onceyouhaveinputallthenecessarydataforaparticular
modelintoyourtransmitter,westronglyrecommendthat
youimmediatelywritethatinformationdownonthedata
sheetprovided.Thisinsuresthat,intherarecaseofamem-
oryfailure,youwillnotloseyourmodels’set-updata.
Forthosewhowouldliketogetouttothetrackquicklywith
justthebasicradioset-up,pleaserefertotheQuickStart
sectionthatfollows.
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XR-2 Quick Start Setup
Inthismanualyou’llfindin-depthinstructionsdetailingall
thestepsandproceduresyou’llneedtofollowinorderto
programeachoftheXR-2’sfeaturescorrectly.Forthoserac-
erswhowanttogettothetrackfast,wehaveprovidedthe
QuickStartsectionbelow.QuickStartcoversthebasicpro-
gramminginformationnecessarytogetyoutothetrackfast.
Later,whenyouwanttolearnmoreaboutthespecific
featuresoftheXR-2,refertotheappropriatepage(s)inthis
manualformoredetailedprogramminginformation.
Servo Reversing
1. Withthetransmitterpowerswitchon,presstheMODE
keytoentertheFunctionMode.
2. PresstheMODEkeyfourtimesuntilSTappearsonthe
screen.TheSTindicatesthesteeringservoreversing
screen.
3. Presstheincreaseordecreasekeytomovethecursorto
thedesiredservodirection(Rev.Norm).
4. PresstheCHANNELkeyoncetoaccessthethrottleservo
reversingscreen.
5. Toselectthedirectionofthethrottleservo,repeatStep3
above.
Travel Adjustment
1. FromtheServoReversefunction,presstheMODEkey
twicetoaccesstheTravelAdjustmentfunction(theSTR
orSTLscreenwillappear).
Steering Adjustment:
2. Rotatethesteeringwheelinthedesireddirection(leftor
right)tobeadjusted.
3. PresstheINCREASEorDECREASEkeystoselectthe
desiredtravelvalue.
Throttle Adjustment:
4. PresstheCHANNELkeyonce.FWDwillappearonthe
screen.
5. PresstheINCREASEorDECREASEkeystoselectthe
desiredtravelvalue.
6. PresstheMODEandCHANNELkeysatthesametimeto
exittheFunctionMode.
Servo Trim Adjustment
Steering Servo Trim Adjustment:
1. Withthetransmitterpowerswitchon,movethedigital
steeringtrimleverinthedesiredpositiontobeadjusted.
Thesteeringtrimvaluescreenwillappearautomatically.
Throttle Servo Trim Adjustment:
2. Withthetransmitterpowerswitchon,movethedigital
throttletrimleverinthedesiredpositiontobeadjusted.
Thethrottletrimvaluescreenwillappearautomatically.
st
—
REV•NORM
MODE
ENTER
CHANNEL
MODE
Indicatescurrent
channel
ST=Steering
TH=Throttle
Indicatescurrent
servodirection
INCREASE
CLEAR
+–
DECREASE
CHANNEL
str
100
TRVADJ.
MODE
Indicatescurrent
adjustmentposition
STR=Steeringright
STL=Steeringleft
FWD=Forwardtrigger
BRM= Reverse
(brake)trigger
Indicatescurrent
value
st
0
tht
0
Indicatessteering
trimfunction
Indicatesthrottle
trimfunction
Indicatescurrent
value
Indicatescurrent
value
Throttletrim
Steeringtrim
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System Features
Transmitter Features
• TwoChannels
• AMmodulation
• Easy-to-readLCDgraphicsdisplay
• Twomodelmemory
• Three-digitmodelnameentry
• Electronicdigitaltrimleversforthrottleandsteering
• Twoassignableelectronicgriplevers
• Directdisplaytrimfunction
• Servoreversing
• Sub-trim
• Steeringdualrate
• Steeringendpointadjustment
(twopoints—leftandright)
• Brake/throttlepointadjustment
• Lowbatteryalarm
• Plug-incrystals
• Chargejackreceptacle(rechargeablebatteries
notincluded,orderJRPB958)
R-122 Receiver Features
• TwoChannels
• AMmodulation
• 27MHz/75MHzavailable
• Batteryeliminatorcircuitry(BEC)
• PatentedABC&Winterferencetechnology
Z250 Servo Features
• Zerodeadbandamplifierforaccurateneutralcentering
• Lowcurrentdrain
• Indirectdrivefeedbackpotentiometerforadditional
vibrationprotection
• SurfaceMountTechnology(SMT)
• Durablenylongeartrainforlonglife
System Specifications
System Components
XR-2 Transmitter Specifications
R-122 Receiver Specifications
Z250 Servo Specifications
Torque(oz/in) 40.3oz/in
Speed. 25sec/60
Weight(oz) 1.47oz
Size(in)(WxLxH) 0.73x1.52x1.32
Motor 3-poleferritetype
ModelNumber NER-122
Type 2-channel/AM
ABC&Wcircuitry
Frequency 27/75MHz
Sensitivity 5qsminimum
(microseconds)
Selectivity 8KHz/50dB
Weight(oz) .88oz
Size(in)(WxLxH) 1.26′′×1.76′′ ×.87′′
Receiverantenna 14.75′′
PowerSupply 4.8-6.0VD/C
Modelnumber XR-2
Encoder 2-channelcomputersystem
RFoutput 27/75MHz
Modulation AMmodulation
Outputpower 195.0Mw
Currentdrain 150mA
Powersource 1.2Vx8drycell
(1.2V×8NiCad
600mAhoptional)
Outputpulse 1000-2000(1500neutral)
Systemname XR-2
Transmitter NETXR-2
Receiver R-122
Servos Z250x2(1ifequippedwithESC
speedcontrol)
Accessories B.E.C.switchharnesswithbat-
terycaseServoaccessories(for
twoservos)Instructionmanual
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Control Identification and Location
Antenna
Steeringwheel
Electronicdigital
steeringtrimlever
DotMatrixmulti-
dataLCDdisplay
3digitnameinput
Digitalvoltage
reading
Electronicdigital
gripleverA
Electronicdigital
gripleverB
Powerswitch Chargejack
Modebutton
=Enterfunction
=Clearfunction
Channelbutton
Increasebutton
Decreasebutton
Electronicdigital
throttletrimlever
Throttletrigger
Adjustable
steeringtension
Batterycover*
(8AAbatteriesrequired)
*Toremove,pressdown where it says “press”andpushthecoverinthedirection of the arrow.
Removethebatterycase and install eight AAbatteriesinthedirectionshownasmolded into the
batterycase.Iftransmitter voltage fails to register,checkforcorrectbatteryinstallationandvoltage.
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R/C Safety Precautions
ForsafeandreliableperformanceofyourR/Cmodel,please
carefullyreadandfollowtheseguidelines:
1. Radiocontrolmodelsarenottoys.Theyarecapableof
inflictingseriousinjurytopeopleandproperty.Usecau-
tionatalltimeswhenoperatingyourmodel.
2. YouareresponsibleforthesafeoperationofyourR/C
model.Youmustproperlyinstall,testandoperateyour
modelwithaclearsenseofthatresponsibility.Donot
takerisksthatmightendangeryourselforothers.
3. RunninganR/Ccarinthestreetsisverydangerousto
bothdriversandmodels.Avoidrunningyourmodelin
areasoccupiedbyfullsizeautomobiles.Tolocateareas
whereyoucansafelyoperateyourmodel,youshould
contactyourlocalhobbyshopforR/Ctracksorclubsin
yourarea.
4. WhenrunninganR/Cboat,keepitawayfromanyswim-
mers,fullsizeboats,orwildlife.Also,watchcarefullyfor
fishinglinesthatcanentanglethepropeller.
5. Beforeoperatingyourmodel,makesureyourfrequencyis
clear.Ifsomeoneelseisoperatingonthesamefrequency,
bothmodelswillgooutofcontrol,possiblycausingdam-
agetothemodelsaswellasothers.
6. IfatanytimewhileoperatingyourR/Cmodelyousense
abnormalmodelfunctioning,endyouroperationimmedi-
ately.Donotoperateyourmodelagainuntilyouarecer-
taintheproblemhasbeencorrected.
CAUTION: Controlofyourmodelisimpossiblewithoutsuf-
ficientvoltageforthetransmitterandreceiver.Aweaktrans-
mitterbatterywilldecreaseyourrangeofoperationanda
weakreceiverbatterywillslowservomovementand
decreaseyourrangeofoperation.Checkyourreceiverpack
voltageoftentoavoidlosingcontrolofyourmodel.When
usingamodelthatoperatesboththeelectricmotorandthe
receiverfromthesamebattery(BatteryEliminatingCircuitry
orB.E.C.),youshoulddiscontinueusewhenthetopspeed
sharplydecreasesoryouwillquicklylosecontrolofyour
model.
Steering Tension
Adjustment
Steeringtensionisadjustableviatherecessedscrewlocated
beneaththesteeringwheel(seepage5forexactlocation).
Turningthescrewclockwiseincreasesthesteeringtension.
Charging Jack
Locatedontheright-handsideofthetransmitteristhe
chargingjack,whichacceptsonlyJRwallchargers.Please
donotattempttouseanyotherbrandofwallchargerasit
maybereversepolarityandcancausedamagetoyour
system.OnlyusetheJRwallchargerwhentheXR-2is
equippedwithNi-Cadbatteries(notincluded,JRPB958).
JR TRANSMITTER CHARGE JACK POLARITY:
Charger Pigtail For Transmitter
Black To Positive
Red To Negative
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Receiver/Servo Connections
and Installation
YourR-122ReceiverisequippedwithBatteryEliminator
Circuitry(B.E.C.).Thereceivergetsitspowerfromthe
model’sNi-Cadbatterypack,thussavingtheweightofan
additionalreceiverbattery.Ni-Cadbatteriesfrom4.8–8.4V
(4–7cells)canbeusedsafely.Highervoltagepacksmay
damagethereceiverandservos.
Note: WhenusingaseparatereceiverNi-Cadasapower
source,theoperatingvoltagerangeis4.8–6.0V
(4–5cell)
Attention: Makesurethemaleandfemaleconnectorshave
thecorrectpolarity(+/–)beforeconnecting.Theservolead
andreceivercasearemoldedsothattheleadcanonlybe
insertedcorrectly.Besuretoorienttheservoplugcorrectly
forproperinsertion.
Youmayuseaseparategastopowerthereceiver(suchas
forsomeelectricboatsoringas-poweredvehicles).ANi-
CadpackpluggedintotheBATTsocketonyourreceiverwill
operateyourreceiver.Youmayalsousealkalinebatteries
withtheincludedbatterybox.
Ifyouuseamechanicalspeedcontroller,pleasemakesure
thatithasthecorrectconnectorforaB.E.C.system(redcon-
nector).SeeFigureAbelowforatypicalset-up.
MostelectronicspeedcontrollersaresetupforB.E.C.oper-
ationandplugdirectlyintoyourreceiver(Function2).See
FigureBforatypicalset-upandcheckyourspeed
controller’smanualforcorrectinstallation.
BEC
BEC
Figure A – Connections toB.E.C.receiverwithmechanicalspeed
controller.Ni-Cadbatteryand speed controller are notincludedinthe
radioset.
Figure B – Connections toB.E.C.receiverwith
electronicspeedcontroller.Ni-Cad battery and
speedcontrollerarenot included in the radioset.
ToResistors Mechanical
SpeedControl
BECConnector
Switch
R-122Receiver
R-122 Z250Servos
ToMotor
BatteryBox
(Forusewithoptional
separatereceiverbattery
power)
7.2V-8.4VBattery
7.2–8.4VBattery
R122Receiver
R122
Z250Servo
BECConnector
E.S.C.
ToMotor
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Operating Your Model
It’simportanttolearnthepropersequenceforswitching
on/offyourradiosystem:
BEFORE OPERATION:Switchonthetransmitter,thenthe
receiver.
AFTER OPERATION:Switchoffthereceiver,thenthe
transmitter.
Thisensuresthatyouwillalwayshaveasignaltothereceiv-
er,andyourR/Cmodelwillnotoperateoutofcontrolwhen
youturnoffthetransmitter.
Servo Mounting Flange
Rubber Grommets
Rubber Grommets
Servo Case
Servo Lead w/Connector
Servo Output Shaft
Servo Mounting Flange Servo Arm/Horn
Servo Arm Retaining Screw
Servo Eyelet
Z250 Servo
Top View
Key Input and Display
MODE
ENTER
CHANNEL
ToentertheFunction Mode press the MODE
keywhilethetransmitter is on. Press the INCREASEandDECREASEkeys
simultaneouslytoclearthe screen or return
tofactorypreset.
ToentertheSystem Mode press the MODE
andCHANNELkeyssimultaneously and
holdwhileturningon the transmitter.
INCREASE
CLEAR
+–
DECREASE
Servo Layout
Note: Rubbergrommets
and(sometimes)
eyeletsareusedin
fuel-powered
vehicles.
KEY
MODE
CHANNEL
INCREASE
DECREASE
Usedtomoveup through the available functions
Usedtoselectthe desired channel
Usedtoincreasethe value of the selectedfunction
Usedtodecreasethe value of the selectedfunction
USE
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Display Screens
Normal Display Screen
Whenthepowerswitchisturnedon,theLCDscreenwill
readasshownhereinthediagram.Thisscreenisreferredto
astheNormalDisplay.
Note: Ifanyoftheelectronictrimbuttonsaremoved
whileinthisscreen,thescreenwillautomatically
changetodisplaythetriminuse.Thisiscalled
theDirectTrimMode.Formoreinformationon
thefeature,pleaseseepage19ofthismanual.
Low Battery Screen/Lithium Battery
Backup
WhenthevoltageoftheeightAAbatteriesdropsbelow9.0
volts,theXR-2’sdisplayscreenwillalternatebetweenthe
Normal(seeabove)andLowBatteryscreen(BATT)anda
continuousbeepingwilloccur,indicatingthatthebatteries
needtobereplacedbeforefurtheruse.TheLowBattery
screenisactiveduringanyofthethreeoperatingmodes.
Lithium Battery
YourXR-2radiosystemisequippedwitha5yearlithium
batterybackupsystem.Thissystemisdesignedtoprotect
andretainallradioprogrammingintheeventthatthetrans-
mitterbatteriesdropbelowtherequired9.0volts,orthe
transmitterbatterycaseisremovedduringbatterychanges.If
afterfiveyearsitbecomesnecessarytoreplacethelithium
battery,returnyoursystemtotheHorizonServiceCenterfor
repair(seeaddress,page23).
Memory Backup Screen
IftheMemoryBackupscreenappears,thisindicatesthatany
programmingchangesmadesincethelasttimethesystem
wasturnedonmustbesavedbypressingtheMODEand
CHANNELbuttonsatthesametime.Ifyoudonotsave,the
recentprogrammingchangeswillbelost.Ifthisscreen
appearsforasecondtime,itissuggestedthattheXR-2
transmitterbereturnedtotheHorizonServiceCenterforser-
vicing(seeWarrantyInformation,page23).
bat
8.9V
md !
10.2V
bak
ER
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Accessing the Model Name
Entry Function
ToaccesstheModelNameEntryfunction,followthesteps
below:
1. PresstheMODEandCHANNELkeysatthesametimeand
hold.
2. TurnonthetransmitterpowerswitchtoentertheSystem
Mode.
3. MD1shouldnowbepresentonthescreen.
4. PresstheINCREASEorDECREASEkeystoselectthecor-
rectletter/numberforthefirstcharacter(flashing).
5. Tochangetheremainingtwocharacters,presstheCHAN-
NELkeyuntilthedesiredcharactertobechangedisflash-
ing.
6. ToaccesstheDataResetfunction,presstheMODEkey.
ToexittheSystemMode,eitherturnthetransmitterpower
switchofforpresstheMODEandCHANNELkeysatthe
sametime.
Model Name Entry
(System Mode)
TheXR-2allowsathree-digitnametobeinputforeachof
thetwo(2)modelsavailable.Thecurrentmodel,withname,
willthenbedisplayedintheNormaldisplayscreen.Thisfea-
tureisusefultohelpidentifydifferentmodels,setups,etc.
Forinformationonselectingmodels1or2,pleasereferto
theModelSelectFunction(page13).
10
Accessing the System Mode
ToentertheSystemMode,pressboththeMODEandCHAN-
NELkeysatthesametimewhileturningonthetransmitter
powerswitch.BypressingtheMODEkey,youcannow
selecteitherthemodelnameinputordataresetfunctionsas
shownhereontheSystemModeflowchart.Informationfor
eachfunctionislocatedonthepagenumberlistednextto
thefunctionnameontheflowchart.
ToexittheSystemMode,presstheMODEandCHANNEL
keysatthesametime,orsimplyturnoffthetransmitter.
md !
1
md !
1
clr
1
ModelNameEntry,
page10
Flashingcharacter
indicatesthecharacter
tobeadjusted
Currentmodel
number
DataReset,page11
MODE
ENTER
CHANNEL
INCREASE
CLEAR
+–
DECREASE
PresstheMODEand
CHANNELkeysatthe
sametimeandhold to
entertheSystemMode
PresstheCHANNEL
keytoselectthe
charactertobe
changed
Presstheincreaseor
decreasekeystoselect
thecorrectletter/
numbertobeused
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