JR X9503 2.4 Owner's manual

INSTRUCTION AND
PROGRAMMING MANUAL
X9503 2.4
9-CHANNEL, 50-MODEL MEMORY
COMPUTER RADIO SYSTEM WITH
SPEKTRUM 2.4GHz DSM TECHNOLOGY

Table of ContentsTable of Contents
G-2
G-3
Section 1: Using the Manual ......................................................................................................................... G-9
Features......................................................................................................................................................... G-9
Specications................................................................................................................................................ G-9
Section 2:Transmitter and Receiver Specifications................................................................................. G-9
JR X9503 Transmitter..................................................................................................................................... G-9
JR R921 Receiver ..........................................................................................................................................G-10
Features.......................................................................................................................................................G-10
Specications..............................................................................................................................................G-10
Section 3: Component Specifications.......................................................................................................G-11
Servo Specications......................................................................................................................................G-11
Charger Specifications ................................................................................................................................. G-11
Airborne Battery Pack.................................................................................................................................G-11
Airborne Battery Pack Specications...................................................................................................G-11
Battery Charging ...........................................................................................................................................G-12
Transmitter/Receiver....................................................................................................................................G-12
JR Transmitter Charging...........................................................................................................................G-12
Using the Included Charger....................................................................................................................G-12
X9503 2.4 Transmitter Features (Mode 2 Airplane Shown)...............................................................G-13
X9503 2.4 Transmitter Features (Rear)...................................................................................................G-14
Battery Cover............................................................................................................................................ G-14
X9503 2.4 Transmitter Features (Internal) .............................................................................................G-15
Control Stick Tension Adjustment.............................................................................................................G-15
Back of Transmitter (Mode 2)................................................................................................................ G-15
Advanced Digital Trims ................................................................................................................................G-16
Control Stick Length....................................................................................................................................G-16
Neckstrap Attachment.................................................................................................................................G-16
Installing the Receiver..................................................................................................................................G-17
Installing the JR R921 ...............................................................................................................................G-17
ModelMatch....................................................................................................................................................G-18
Other Important Installation Tips .........................................................................................................G-18
Binding .............................................................................................................................................................G-19
How to Bind...................................................................................................................................................G-19
Fail-Safe Functions.........................................................................................................................................G-20
SmartSafe ........................................................................................................................................................G-20
Receiver Power Only...............................................................................................................................G-20
After Connection......................................................................................................................................G-20
Preset Fail-Safe...............................................................................................................................................G-20
Receiver Power Only...............................................................................................................................G-20
After Connection......................................................................................................................................G-20
Programming SmartSafe ..............................................................................................................................G-20
(All Spektrum Aircraft Receivers) .........................................................................................................G-20
Programming Preset Fail-Safe.....................................................................................................................G-21
(JR R921 and Spektrum AR9000 Receivers Only).............................................................................G-21
Standard Range Testing ................................................................................................................................G-21
Range Testing the X9503 2.4 ..................................................................................................................G-21
Advanced Range Testing Using a Flight Log............................................................................................G-22
Advanced Range Testing the X9503 2.4...............................................................................................G-22
Flight Log—Optional for JR R921 Receiver...........................................................................................G-23
Using the Flight Log..................................................................................................................................G-23
Receiver Power System Requirements....................................................................................................G-24
Recommended Power System Guidelines...............................................................................................G-24
Flash Memory ................................................................................................................................................G-25
Battery Alarm and Display..........................................................................................................................G-25
Tips on Using 2.4GHz Systems .................................................................................................................G-25
Airplane – ACRO Mode .................................................................................................................................A-1
Flight Modes..................................................................................................................................................A-1
ACRO Programming - Please Read.........................................................................................................A-1
ACRO - Getting Started – System Menu Basics..................................................................................A-1
Access the System Menu................................................................................................................................A-2
Select a Model Memory .................................................................................................................................A-2
Reset The Model ..............................................................................................................................................A-3
To Activate the ACRO Mode ........................................................................................................................A-4
Enter a Name for the Model.........................................................................................................................A-4
ACRO - System Menu - Advanced Functions...........................................................................................A-5
Flight Modes......................................................................................................................................................A-6
To Activate Flight Modes ................................................................................................................................A-7
TRIM:COM (Flight Modes)............................................................................................................................A-8
D/R:SW (Flight Modes) ..................................................................................................................................A-8
Switch Assignments .........................................................................................................................................A-9
Flap Trim On/Off ..............................................................................................................................................A-9
Activate/Inhibit Switches ............................................................................................................................. A-10
Wing Type ....................................................................................................................................................... A-11
Wing Parameter – (Wing Type)................................................................................................................. A-12
V-tail (Wing Type).......................................................................................................................................... A-14
Dual Channels (Wing Type)........................................................................................................................ A-14
Twin E. (Wing Type) ...................................................................................................................................... A-16
Trim Step......................................................................................................................................................... A-18
ACRO – Function List ............................................................................................................................. A-19
REV.SW – Servo Reversing ........................................................................................................................ A-19
SUB TRIM........................................................................................................................................................ A-20
TRVL ADJ. – Travel Adjust............................................................................................................................ A-21
D/R & EXP – Dual Rate and Exponential................................................................................................ A-22
THRO CURV – Throttle Curve................................................................................................................. A-23
FLAP SYS. – Flap System.............................................................................................................................. A-25
Auto Land (Flap System) ............................................................................................................................. A-26
ELEV – Elevator Compensation (Flap System)....................................................................................... A-27

Table of Contents Table of Contents
G-4
G-5
FLAP – (Flap System) ................................................................................................................................... A-28
FM0-FM2 (Flap System) ............................................................................................................................... A-29
Delay (Flap System) ...................................................................................................................................... A-30
ELEFLP M – Elevator-to-Flap Mixing .................................................................................................... A-31
AILRUD M – Aileron-to-Rudder Mixing ............................................................................................ A-32
AIL DIFF. – Aileron Differential .................................................................................................................. A-33
SRV. SPEED – Servo Speed.......................................................................................................................... A-35
Snap Roll ......................................................................................................................................................... A-36
GYRO SYS. – Gyro System......................................................................................................................... A-37
Gyro Connections (Gyro System)............................................................................................................ A-37
Fixed Gyro Gain (Gyro System)................................................................................................................ A-38
Stick Override Gyro Gain (Gyro System)............................................................................................... A-39
PROG MIX – Programmable Mixers........................................................................................................ A-40
Standard Programmable Mixer – Example: Down Elevator at Idle.................................................... A-41
Multi-Point Mixer – Example: Eliminate Pitch-Coupling....................................................................... A-43
Trainer – Trainer System ............................................................................................................................. A-45
X9503 Used as Master (Iinstructor) – (Trainer System) ..................................................................... A-45
X9503 2.4 Used as Slave (Student) – (Trainer System)........................................................................ A-46
Timer – Timer System ................................................................................................................................. A-47
Monitor ........................................................................................................................................................... A-48
Utility Functions ............................................................................................................................................ A-49
Copy – Copy the Currently Selected Model to Another Model Memory ...................................... A-49
Transfer – Transfer the Model to Another Transmitter or to DataSafe............................................ A-51
Receive a Model into the X9503 2.4 – (Transfer function)................................................................. A-51
Receive a Model into the X9503 2.4 – (Transfer function)................................................................. A-52
Sub Trim Usage and Mechanical Advantage............................................................................................. A-53
Sub Trim....................................................................................................................................................... A-53
Mechanical Advantage .............................................................................................................................. A-53
Dual Rates and Exponential Curves ......................................................................................................... A-54
Setup Sheet (Aircraft) .................................................................................................................................. A-55
X9503 2.4 Helicopter – Heli Mode ........................................................................................................... H-1
Introduction ................................................................................................................................................. H-1
Heli Programming - Please Read ................................................................................................................. H-1
Heli - Getting Started – System Menu Basics........................................................................................... H-1
Access the System Menu............................................................................................................................... H-2
Model SEL- Model Selection......................................................................................................................... H-2
Copy – Copying the Currently Selected Model to Another Model Memory ................................... H-3
Data Reset – Reset the Model..................................................................................................................... H-5
Type Select – To Activate the Heli Mode................................................................................................... H-6
MDL Name-Enter a Name for the Model................................................................................................. H-6
Transfer – Transfer the Model to Another Transmitter or to DataSafe.............................................. H-7
Transfer a Model From the X9503 2.4 – (Transfer function) – To Send ............................................ H-7
Transfer a Model to the X9503 2.4 – (Transfer function) – To Receive............................................. H-8
Trim Step........................................................................................................................................................... H-9
Heli - System Menu - Advanced Functions.............................................................................................. H-10
Additional Flight Modes 3 and 4................................................................................................................H-10
RUD TRIM: COM – (Flight Mode Trim Options)...................................................................................H-11
Switch Assignments ...................................................................................................................................... H-11
Activate/Deactivate Switches.....................................................................................................................H-12
Governor Program Activation ...................................................................................................................H-12
SWASH TYP-Swashplate Type....................................................................................................................H-13
Accessing the Swashplate Type Function.................................................................................................H-13
Function Mode...............................................................................................................................................H-14
Heli – Function List ...................................................................................................................................... H-14
D/R & EXP – Dual Rate and Exponential................................................................................................H-14
Auto Dual Rate..............................................................................................................................................H-15
REV.SW - Servo Reversing .........................................................................................................................H-15
Sub Trim........................................................................................................................................................... H-16
TRVL ADJ. – Travel Adjust............................................................................................................................H-17
Swash Mix- CCPM Swashplate Mixing ....................................................................................................H-18
Variations of CCPM Mixing ....................................................................................................................H-18
CCPM Servo Connection/Channel Numbers....................................................................................H-18
Accessing the Swashplate Mixing Function.........................................................................................H-19
CCPM Exponential (EXP) ...........................................................................................................................H-19
THRO HOLD- Throttle Hold .................................................................................................................... H-20
Accessing the Throttle Hold Function .................................................................................................H-20
Stick Auto/Auto Cut Setting.......................................................................................................................H-21
Hold Delay......................................................................................................................................................H-21
THRO CURV – Throttle Curves...............................................................................................................H-22
Accessing the Throttle Curve Function...............................................................................................H-23
Throttle Trim Lever Function.....................................................................................................................H-24
Hovering Throttle Lever..............................................................................................................................H-24
Throttle Curve Exponential .......................................................................................................................H-24
Accessing the Throttle Curve Exponential Function........................................................................H-24
PIT. CURV/Pitch Curves Function.............................................................................................................H-25
Accessing the Pitch Curve Function..................................................................................................... H-25
Hovering Pitch Lever....................................................................................................................................H-26
Example of Throttle Curve and Pitch Curve Settings ......................................................................H-26
Accessing the Revolution Mixing Function .........................................................................................H-27
Setting up Revolution Mixing..................................................................................................................H-27
REVO.MIX/Revo Mix Function: Non Heading Lock Gyros Only.......................................................H-27
GYRO SENS/Gyro Gain Function.............................................................................................................H-28
Accessing the Gyro Gain Function....................................................................................................... H-28
Gyro Remote Gain Connections: JR G370, G770 and Others .....................................................H-29
Remote Gain Gyros .....................................................................................................................................H-29
Mixing – Cyclic-to-Throttle Mixing...........................................................................................................H-29
Rudder-to-Throttle Mixing .........................................................................................................................H-30
Accessing the Cyclic-to-Throttle Function.........................................................................................H-31

Table of Contents Table of Contents
G-6
G-7
Aileron-to-Throttle and Elevator-to-Throttle Mixing...........................................................................H-31
Setting the Desired Flight Modes for Cyclic-to-Throttle Mixing...................................................H-31
Governor- Governor Function..................................................................................................................H-32
Accessing the Governor Function ........................................................................................................H-32
PROG MIX 1-6 – Programmable Mixes 1 through 6............................................................................ H-33
Swashplate Timing Mixes Example: Elevator-to-Aileron (CorrectsVertical Tracking).................... H-35
Swashplate Timing:Aileron-to-Elevator (Corrects Rolling Maneuvers)............................................H-37
Standard Programmable Mixes – Example: Right Aileron with Positive Pitch.............................H-39
Multi-Point Mixes – Example: FMOD to Gear Mixing (Retract and other Functions)..................H-41
Trainer – ProgrammableTrainer System..................................................................................................H-44
X9503 2.4 Used as Master (Instructor) – (Trainer System) ...........................................................H-44
X9503 2.4 Used as Slave (Student) – (Trainer System) ...................................................................H-45
Timer – Timer System ................................................................................................................................. H-46
Monitor – Servo Monitor ........................................................................................................................... H-47
Setup Sheet (Helicopter).............................................................................................................................H-48
Sailplane – GLID Mode....................................................................................................................................S-1
System Mode GLID Features.....................................................................................................................S-1
Function Mode GLID Features..................................................................................................................S-1
System Mode......................................................................................................................................................S-2
System Mode......................................................................................................................................................S-2
To Enter System Mode:................................................................................................................................S-2
Model Select.......................................................................................................................................................S-3
Copy – Copying the Currently Selected Model to Another Model Memory .....................................S-4
Model Name ......................................................................................................................................................S-6
Type Select..........................................................................................................................................................S-6
Model Reset .......................................................................................................................................................S-7
Transfer – Transfer the Model to Another Transmitter or to DataSafe................................................S-8
Transfer a model from the X9503 2.4 – (Transfer Function) .................................................................S-8
Transfer a model to the X9503 2.4 – (Transfer Function) ......................................................................S-9
Trim Step.......................................................................................................................................................... S-10
Device Select................................................................................................................................................... S-11
Flight Modes................................................................................................................................................ S-11
Activating and Assigning Flight Modes....................................................................................................... S-12
Motor Function .............................................................................................................................................. S-13
Flap and AUX Functions............................................................................................................................... S-14
Activating / Inhibiting Channels .............................................................................................................. S-14
Wing Type ........................................................................................................................................................ S-15
Function Mode ........................................................................................................................................... S-16
D/R & EXP – Dual Rate and Exponential................................................................................................. S-18
REV.SW – Servo Reversing ......................................................................................................................... S-19
Sub Trim............................................................................................................................................................ S-20
TRVL.ADJ - Travel Adjust ............................................................................................................................. S-21
Elevator-to-Flap Mix ...................................................................................................................................... S-21
Aileron-to-Flap Mix ....................................................................................................................................... S-22
Differential....................................................................................................................................................... S-22
Camber Adjust................................................................................................................................................ S-23
Camber Mix .................................................................................................................................................... S-24
Aileron-to-Rudder Mix ................................................................................................................................. S-25
Buttery Mix (Landing Flaps)....................................................................................................................... S-26
Flap Rate........................................................................................................................................................... S-27
Motor Hold ..................................................................................................................................................... S-27
Programmable Curve Mix 1 (Programmed for Spoiler-to-Elevator Mix).......................................... S-28
PROG MIX - Programmable Mixers.......................................................................................................... S-29
Multi-Point Programmable Mixer............................................................................................................... S-33
Trainer – ProgrammableTrainer System................................................................................................... S-36
X9503 2.4 Used as Master (Instructor) – (Trainer System) ............................................................ S-36
X9503 2.4 Used as Slave (Student) – (Trainer System) .................................................................... S-37
Timer ................................................................................................................................................................ S-37
Monitor ............................................................................................................................................................ S-38
Programming a 6-Channel Sailplane by Engineering Manager John Adams...................................... S-39
Channel Assignment .................................................................................................................................. S-41
Step #1 Servo Assignment .......................................................................................................................... S-41
Step #2 System Mode................................................................................................................................... S-42
Step #3 Selecting a Model Memory........................................................................................................... S-42
Step #4 Selecting Model Type...................................................................................................................... S-43
Step #5 Naming a Model.............................................................................................................................. S-43
Step #6 Turning Off the Spoiler Stick Trim............................................................................................... S-44
Step #7 Establishing Flight Modes ..............................................................................................................S-44
Step #8 Wing and Tail Type Select .............................................................................................................. S-45
Step #9 Entering FUNC.LIST...................................................................................................................... S-45
Step #10 Servo Reversing............................................................................................................................ S-46
Step #11 Sub Trim.......................................................................................................................................... S-47
Step #12 Travel Adjust................................................................................................................................... S-48
Step #13 Buttery (Landing Flaps)............................................................................................................. S-48
Setting Up Flight Modes ........................................................................................................................... S-49
Launch Mode Setup................................................................................................................................... S-49
Step #14 Spoiler to Elevator Curve Mix (Programmable Mix 1) ....................................................... S-49
Step #15 Launch Pre-sets ............................................................................................................................ S-50
Step #16 Dual Rate and Exponential......................................................................................................... S-51
Step #17 Elevator-to-Flap Mix .................................................................................................................... S-51
Step #18 Aileron-to-Flap .............................................................................................................................. S-52
Step #19 Aileron Differential....................................................................................................................... S-52
Flaperon Mix ............................................................................................................................................... S-53
Step #20 Flap Rate, Camber Mix and Camber Adjust........................................................................... S-53
Step #21 Flap Rate, Camber Mix and Camber Adjust (continued) .................................................... S-54
Flaperon Mix ............................................................................................................................................... S-54
Flaperon Mix Delay.................................................................................................................................... S-54
Setting up Cruise Mode............................................................................................................................ S-55
Step #22 Aileron-to-Rudder Mix ............................................................................................................. S-55
Step #23 Cruise Pre-sets ............................................................................................................................. S-56

JR X9503 Transmitter
Section 2: Transmitter and Receiver Specifications
Section 1: Using the Manual
G-8
G-9
JR’s X9503 2.4 offers airplane, helicopter and sailplane
pilots sophisticated programming that JR’s 9303 is
famous for with the added benefits of a backlight screen,
50-model memory, and new throttle timer start for
aircraft and helicopter model types plus fully integrated
Spektrum 2.4GHz DSM®radio link technology. DSM
(Digital Spektrum Modulation) technology offers a far
superior RF link than narrow band 72MHz FM and PCM
systems, providing a higher level of confidence and
safety. Now with even the most sophisticated models
up to 9 channels, you’ll no longer have to wait for an
open frequency, worry about someone unintentionally
powering up on the same frequency, or have to plan a
frequency-based flight matrix for competition. And for
response-critical aircraft like 3D helicopters and airplanes,
latency (the time it takes for a stick input to translate to a
servo output) is significantly reduced providing a more
responsive precise connection to your model.
Features
•Fullyintegrated2.4GHzSpektrumRFlink
•Sophisticatedthree-model-typeprogramming:Airplane,Helicopter,Sailplane
•PatentedDuaLink®technology
•ModelMatch™
•ServoSync™
•RollingSelectorinput
•Digital3+1trims
•50-modelmemory
•Backlightscreen
Specifications
•Modelnumber—Airplane/Sailplane(JRP2930),Helicopter(JRP2935)
•Numberofchannels—9
•Modulationtype—DirectSequenceSpreadSpectrumDSM2/DSM1protocol
•Band—2.400to2.483GHz
•Spectralcapacity—40simultaneoussystems
•Transmittercurrent—180mA/DSM2280mA/DSM1
•Resolution—2048withR921receiver
In the front of this manual you will find common
transmitter features and specifications plus information
on the included components and accessories. Guidelines
for receiver and servo installation are also included. In
each section of this manual (Air, Heli and Sailplane) are
instructions for adjusting model-specific programming
and functions. An explanation of the purpose of each
programming function is provided, followed by an
illustrationofitscorrespondingLCDdisplayand
instructions on how to access and adjust the function.
A blank data sheet has been included at the end of each
section, as well as on the JR web site. Once all data has
been input for a particular model, you should record
these values and settings on a copy of the data sheet, so
in the rare event of a loss of memory, these settings are
available.
Note:ThemanualfortheX95032.4manualisposted
online at www.horizonhobby.com in the support section or
it can be ordered from your local hobby dealer or directly
from Horizon Hobby.
Step #24 Dual Rate and Exponential......................................................................................................... S-56
Step #25 Elevator-to-Flap Mix .................................................................................................................... S-57
Step #26 Aileron-to-Flap .............................................................................................................................. S-58
Step #27 Aileron Differential....................................................................................................................... S-58
Flap Rate ...................................................................................................................................................... S-59
Flaperon Mix ............................................................................................................................................... S-59
Step #28 Flap Rate, Camber Mix and Camber Adjust........................................................................... S-59
Step #29 Flap Rate, Camber Mix and Camber Adjust (continued) .................................................... S-60
Flaperon Mix Delay.................................................................................................................................... S-60
Setting Up Land Mode .............................................................................................................................. S-61
Step #30 Aileron-to-Rudder Mix .............................................................................................................. S-61
Step #31 Land Pre-sets................................................................................................................................. S-62
Step #32 Dual Rate and Exponential......................................................................................................... S-63
Step #33 Elevator-to-Flap Mix .................................................................................................................... S-64
Step #34 Aileron-to-Flap .............................................................................................................................. S-64
Step #35 Aileron Differential....................................................................................................................... S-64
Flaperon Mix ............................................................................................................................................... S-65
Flaperon Mix ............................................................................................................................................... S-65
Step #36 Flap Rate, Camber Mix and Camber Adjust........................................................................... S-65
Step #37 Flap Rate, Camber Mix and Camber Adjust (continued) .................................................... S-66
Step #38 Aileron-to-Rudder Mix .............................................................................................................. S-66
Flaperon Mix Delay.................................................................................................................................... S-66
Setup Sheet (Sailplane).................................................................................................................................. S-67
Servo Precautions.......................................................................................................................................... W- 1
General Notes................................................................................................................................................ W-1
Federal Aviation Administration.................................................................................................................. W-2
1. Purpose .................................................................................................................................................... W- 2
2. Background.............................................................................................................................................. W-2
3. Operating Standards ............................................................................................................................. W-2
Warning........................................................................................................................................................ W-3
Warranty Period ........................................................................................................................................ W-3
Limited Warranty ....................................................................................................................................... W-3
Damage Limits ............................................................................................................................................ W- 3
Safety Precautions...................................................................................................................................... W- 3
Questions,Assistance, and Repairs ........................................................................................................ W-3
Warranty and Service Information ............................................................................................................ W- 3
Warranty and Service Information ............................................................................................................ W- 4
Inspection or Repairs................................................................................................................................ W-4
Warranty Inspection and Repairs........................................................................................................... W-4
Non-Warranty Repairs............................................................................................................................. W- 4
Safety, Precautions, and Warnings ........................................................................................................... W-4
Instructions for Disposal of WEEE by Users in the European Union............................................ W-5
FCC Information........................................................................................................................................ W-5

JR R921 Receiver
Charger Specifications
Section 3: Component Specifications
G-10
G-11
TheR921receivercombinestwointernalwithoneor
two (optional) remote receivers, offering superior path
diversity.Theradiosystemsimultaneouslytransmits
on two frequencies, creating up to four RF paths on two
different2.4GHzchannels.Thismulti-pathredundancy,
plus the fact that each of the up to 4 receivers are located
in different locations throughout the aircraft exposes each
to a different RF environment creating a superior RF
linkinallconditions.TheJRR921allowstheuse
ofanoptionalFlightLogDataRecorder(JRPA145)to
beused.TheFlightLogplugsintothedataportand
provides quality of RF link data of the previous flight
allowing the confirmation of the operational performance
of the systems.
Features
•9channels
•2internalreceivers
•1or2(optional)remotereceiver(s)
•PatentedMultiLinktechnology
•Twotypesoffail-safe—SmartSafe™and Preprogrammed fail-safe
•FlightLogcompatible
Specifications
•Numberofchannels—9
•Modulation—DSM2
•Band—2.400to2.4835GHz
•Dimensions(WxLxH)—1.23x1.94x.56in
•Weight—Main15g/.6ozRemote3g/.2ozeach
•Current—70mA
•Voltagerange—3.5to9.6V
Note:TheX95032.4isalsocompatiblewithallcurrentJRandSpektrumDSMaircraftreceiversincluding:
AR5005-channel,AR6000,AR6100/E,AR6110/E,AR6300,AR6400/L6-channelparkflyer
AR6200,AR62506-channelfullrange
AR7000,AR7100,AR76007-channelfullrange
AR9000,AR9100,AR93009-channelfullrange
R9229-channelfullrangeandR1221,R122212-channelfullrange
Important:WhenusingtheX95032.4withparkflyerreceivers(theAR6000,AR6100/E,AR6110/E,AR6300and
AR6400),it’simperativethatthesereceiversonlybeflowninparkflyer-typeaircraft(smallelectricairplanesormini
and micro helicopters). Flying receivers designed for parkflyers in larger aircraft could cause loss of control.
Model Number AD35M05
InputVoltage AC120V,60Hz
OutputCurrent 11.6VTransmitter/110mAh,5.8VReceiver/110mAh
ChargingTime 15hours

Transmitter/Receiver
Battery Charging X9503 2.4 Transmitter Features (Mode 2 Airplane Shown)
50
FEATURING 2048 RESOLUTION

G-12
G-13
Note:Youshouldfullychargeboththetransmitter
and the receiver battery packs prior to each flying
session. Also, check the condition of the receiver
battery between each flight using a reliable battery
testerwithabuilt-inload.Theincludedwallcharger
slowchargesata110mArate.Inordertofully
charge the included batteries, you should leave the
charger and batteries hooked up to the included wall
chargerfor15hours.
Youcanuseanoptionalfastchargertochargeboththe
transmitter and receiver batteries. However, the batteries
must be properly charged and the charge condition
should be checked prior to flight. False peaking is a
common occurrence with many fast chargers (batteries
giving an indication the battery is fully charged when
in fact the battery is only partially charged). False
peaking can lead to disastrous results and it is the
pilot’s responsibility to verify the charge condition of the
batteries before every flight. (Also see Receiver Power
Requirements page G-24)
JR Transmitter Charging
ThecenterpinonallJR®and Spektrum™transmitters is
negative.Therefore,thecenterpinonallJRchargersis
negative,notpositive.Thisisdifferentfrommanyother
manufacturers’chargersandradiosystems.Bewareof
improper connections based on “color-coded” wire leads,
astheymaynotapplyinthisinstance.Youmustmake
sure that the center pin of your JR transmitter is always
connected to the negative pole for correct polarity.
Note:Whenusingafastchargertochargethe
transmitterbatterydonotexceed1.5amps(or
1500mAh)chargerateordamagetothetransmitter
or battery damage can occur.
Using the Included Charger
Thepilotlampsshouldalwaysbeonduringthecharging
operation. If not, check to make sure that both the
transmitter and receiver are switched off.
DonotusethechargerforequipmentotherthanJR.The
chargingplugpolaritymaynotbethesame.Equipment
damage can result.
Do not use other manufacturers’ after-market accessories
that plug into the transmitter’s charging jack if you are
unsure of the polarity compatibility with your radio. Seek
expert advice to avoid possible damage.
During the charging operation, the charger’s temperature
is slightly elevated.
All preprogrammed data is protected by a flash memory
that guards against main transmitter battery failure.
CENTER
PIN IS
NEGATIVE
OUTSIDE IS POSITIVE
CHARGER PIGTAIL FOR RECEIVER
CHARGER PIGTAIL FOR TRANSMITTER
BLACK TO POSITIVE
RED TO NEGATIVE
RIGHT SIDE OF TRANSMITTER
RED–POSITIVE / BROWN–NEGATIVE / ORANGE–SIGNAL
TrainerButton
Gear Switch
Flap Switch
Elevator
Dual Rate
FlapTrim
Lever
AUX4/
Rudder Dual
Rate
AuxTrim
Aileron
Dual Rate
AUX2
Mix Switch
Lever
Elevator/
Aileron Stick
Throttle/
Rudder Stick
RudderTrim
ThrottleTrim
ListButton
EnterButton
ClearButton
Power Switch
AileronTrim
ElevatorTrim
Rolling Selector
LCDDisplay

X9503 2.4 Transmitter Features (Rear) X9503 2.4 Transmitter Features (Internal)
Control Stick Tension Adjustment
G-14
G-15
Remove the six transmitter screws from the back cover as
shownonpageG-14.Removethetransmitterback,being
careful not to cause damage to any components.
Adjust each gimbal tension screw for desired tension
(counterclockwise to loosen stick tension; clockwise to
tightensticktension).Whenadjustingthethrottleratchet
tension, make sure that the adjusting screw does not
touch the PC board after adjustment is complete.
Model No. X9503
Horizon Hobby, Inc. Made in Malaysia
U.S. Patent 7,391,320
DC 11.6V
Battery Cover
CAUTION:THEBATTERYCONNECTIONISKEYEDSOTHATITCANONLY
BEPLUGGEDINONEDIRECTION.DONOTFORCE.
Back of Transmitter (Mode 2)
THROTTLETENSIONSCREW
RUDDERTENSIONSCREW
ELEVATORTENSIONSCREW
AILERONTENSIONSCREW

Control Stick Length
Neckstrap Attachment
Installing the Receiver
G-16
G-17
Advanced Digital Trims
TheX95032.4featuresAdvancedDigitalTrims.Onthe
Normal display screen, if a trim lever is moved, the screen
will automatically change to display the graphic position
forthetrimbeingadjusted.TheX95032.4’sAileron,
Elevator,andRuddertrimleversfeatureanaudiblecenter
trimbeep.Thisishelpfulindeterminingthetrimlevers’
center position during flight. In addition, the frequency of
eachtrimstepchangesfromfullright/uptofullleft/down,
allowing the pilot to be aware of the general trim position
audibly without looking at the transmitter.
ByusingtheTrimStepFunctionlocatedintheSystem
Mode, you can adjust the amount of travel per each trim
step for your specific application.
Please note, when you turn it off, the X9503 stores the
trim values in memory and recalls them when turned back
on.
Use a 2mm Allen wrench to unlock the setscrew to adjust
thesticklength.Turnthewrenchcounterclockwiseto
loosenthescrew.Then,turnthestickclockwisetoshorten
or counterclockwise to lengthen the overall stick length.
After the control stick length has been adjusted to suit your
flying style, tighten the 2mm setscrew. If you desire longer
sticks, JR offers a stick (JRPA047) that is approximately
one inch longer than standard, and has various length
anodized aluminum stick ends available (JRPA040-
JRPA045).Thesestickendsarecraftedfrombarstock
aluminum, and are available at your local JR dealer.
An eyelet provided on the face of the X9503 transmitter allows
youtoconnectaNeckStrap(JRPP607).Neckstrapadaptors
are also available to customize the balance of the transmitter
(JRPA140-JRPA142andSPM6703).
Installing the JR R921
TheJRR921incorporatesdualinternalreceivers,andone
or two remote receivers offering the security of up to four
simultaneous RF links for the ultimate in multi-path RF
security.ThemainPCboardhastwointernalreceivers,
while a third remote receiver must be plugged into one
of the antenna ports in order for the system to operate.
Optionally, you can plug a second remote receiver into
the remaining remote antenna port giving a total of four
operationalreceivers.Bylocatingthesereceiversin
different locations throughout the aircraft, each receiver
is exposed to its own RF environment, greatly improving
path diversity.
Note:TheJRR921requiresatleastoneremote
receiver be used.
Install the main receiver using the same method you
would use to install a conventional receiver in your
aircraft.Typicallywrapthemainreceiverinprotective
foam and fasten it in place using rubber bands or hook
and loop straps. Alternately in electric models or in jets
(low vibration), it’s acceptable to use thick double-sided
foam tape to fasten the main receiver in place.
Mounting the remote receiver(s) in a different
location(s) from the primary receiver, gives tremendous
improvementsinpathdiversity.Essentiallyeachreceiver
sees a different RF environment and this is the key to
maintaining a solid RF link, even in aircraft that have
substantial conductive materials, (e.g. turbine engines
with metal tail pipes, carbon fiber, tuned pipes, etc.) which
can weaken the signal.
Using double-sided foam tape, (servo tape) mount the
remote receiver(s) keeping the remote antenna(s) at least
2 inches away from the primary antenna. Ideally the
antennas will be oriented perpendicular to each other;
however,we’vefoundthistonotbecritical.6-inch,
9-inch,12-inch,24-inchand36-inchleadsareavailable
and in sophisticated aircraft, we’ve found it best to mount
the remote receivers in different parts of the aircraft
keeping the remote antennas as far away as practical from
any conductive materials. A typical installation would
include the main receiver mounted in the conventional
location in the fuselage and the remote antennas in the
nose(jets)inthetopturtledeckandeveninthetail.The
optimum location is as far away from any conductive
materials as practical.
LOOSEN
TIGHTEN
SETSCREW

G-18
G-19
In helicopters, there is generally enough room on
the servo tray to achieve the necessary separation. If
necessary, a mount can be made using clear plastic to
mount the remote receiver as shown below.
Other Important Installation Tips
1. Mounttheservosusingrubbergrommetsandbrass
eyelets to isolate them from vibration. Do not over-
tighten the mounting screws; this will negate the
vibrationabsorptioneffectoftherubbergrommets.The
following diagram will assist you in properly mounting
your servo.
 Thebrasseyeletsarepushedfromthebottomupinthe
rubbergrommets.Whentheservoscrewistightened
securely, it provides the proper security as well as the
proper vibration isolation for your servo.
2. Theservosmustbeabletomovefreelyovertheir
entire range of travel. Make sure that the control
linkages do not bind or impede the movement of any
of the servos.
3. Mount all switches away from the engine exhaust and
away from any high-vibration areas. Make sure the
switch operates freely and is able to operate over its
full travel.
It’s necessary to program the receiver to the transmitter
so that the receiver will only recognize that specific
transmitter, ignoring signals from any other sources. If the
receiver is not bound to the transmitter, the system will
not operate. During binding, the servo’s fail-safe positions
are stored.
Thefollowingsequencedescribesthebindingprocedure
fortheJRR921;however,allJRandSpektrumDSM
aircraft receivers are bound in the same way.
How To Bind
1. Withthesystemhookedupasshown,insertthebind
pluginthechargeplugreceptacle.Theswitchmustbe
a3-wiretypeswitch(JRPA001orJRPA004)toenter
bind mode through the switch. Plug the receiver’s
power lead from the switch into the receivers bind
port. If a 3-wire switch is not available, install the male
bind plug into the bind plug receptacle and power the
receiver through any other open port to enter bind
mode.
REMOVE BEFORE USE
2. Poweronthereceiver.NotethattheLEDsonall
receivers should be flashing, indicating that the
receiver is ready to bind.
AR9000
3. Establishthedesiredfail-safestickpositions:normally
low throttle and flight controls neutral.
4. Press and hold the bind button on the back of the
transmitterwhileturningonthepowerswitch.The
bind button should flash and can then be released, and
withinafewsecondsthesystemshouldconnect.The
LEDsonthereceiversshouldgosolid,indicatingthe
system has connected.
5. Remove the bind plug from the receiver or switch
harness and store it in a convenient place.
6. Afteryou’veprogrammedyourmodel,it’simportantto
rebind the system so the true low throttle and neutral
control surface positions are programmed.
Note:Tobindanaircraftwithanelectronicspeed
controller that powers the receiver through the
throttlechannel(BEC),insertthebindplugintothe
battery port and proceed to Step #2.
Binding
ModelMatch
TheX95032.4featuresModelMatchtechnologythat
prevents the operation of a model if the wrong model
memory is selected. During binding, the receiver actually
learnsandremembersthespecificmodelmemory(1thru
50)thatthetransmitteriscurrentlyprogrammedto.Laterif
the incorrect model memory in the transmitter is selected
and the receiver is turned on, the model simply won’t
operate, preventing a possible crash. Change programming
to the correct model memory and you’re set to fly.
ServoMountingTab
Screw
Rubber Grommet
BrassEyelet