JR X9503 2.4 - Features

G-20
G-21
TheJRR921receiverfeaturestwotypesoffail-safe:
SmartSafe and Preset Fail-safe.
SmartSafe
Thistypeoffail-safeisespeciallyidealformosttypesof
electric aircraft and is also recommended for most types
of gas- and glow-powered airplanes and helicopters.
Here’s how SmartSafe works.
Receiver Power Only
Whenthereceiveronlyisturnedon(notransmittersignal
is present), all servos except for the throttle are driven to
their preset fail-safe positions, normally control surfaces
atneutralandthelandinggeardown.Thesefail-safe
positions are stored in the receiver during binding. At this
time the throttle channel has no output, to avoid operating
or arming the electronic speed control. In glow-powered
models, the throttle servo has no input so it remains in its
current position.
After Connection
Whenthetransmitteristurnedonandafterthereceiver
connects to the transmitter, normal control of all channels
occurs. After the system makes a connection, if loss of
signal occurs, SmartSafe drives the throttle servo only
to its preset fail-safe position (low throttle) that was set
during binding. All other channels hold their last position.
Whenthesignalisregained,thesystemimmediately(less
than 4 ms) regains control.
Preset Fail-Safe
Preset fail-safe is ideal for sailplanes and preferred by
some modelers for their glow- and gas-powered aircraft.
Receiver Power Only
Whenthereceiveronlyisturnedon(notransmittersignal
is present) all servos except for the throttle are driven to
their preset fail-safe positions, normally control surfaces
atneutralandthelandinggeardown.Thesefail-safe
positions are stored in the receiver during binding. At this
time the throttle channel has no output, to avoid operating
or arming the electronic speed control. In glow-powered
models, the throttle servo has no input so it remains in its
current position.
After Connection
Whenthetransmitteristurnedonandafterthereceiver
connects to the transmitter, normal control of all
channels occurs. After the system makes a connection,
if loss of signal occurs preset fail-safe drives all servos
to their preset fail-safe positions. For sailplanes,
it’srecommendedthatthespoilers/flapsdeployto
de-thermalize the aircraft, preventing a flyaway. Some
powered modelers prefer to use this fail-safe system to
program a slight turn and low throttle to prevent their
aircraftfromflyingaway.Whenthesignalisregained,the
system immediately (in less than 4 ms) regains control.
Programming SmartSafe
(All Spektrum Aircraft Receivers)
Leavethebindpluginduringthebindingprocess
and remove it only after the receiver connects to the
transmitter. After the connection is made, confirmed by
operatingtheservos,removethebindplug.Thereceiver
is now programmed for SmartSafe.
Fail-Safe Functions
(JR R921, R922, R1221, R1222 and Spektrum
AR7100, AR7100R, AR7600, AR9000, AR9100
Receivers Only)
During the binding process, insert the bind plug in the bind
port or in the charge jack, as the receiver is powered up.
TheLEDsineachreceivershouldblink,indicatingthatthe
receiverisinbindmode.Beforebindingthereceivertothe
transmitter and with the receiver in bind mode, remove the
bindplug.TheLEDswillstillbeblinking.Withthecontrol
sticks and switches in the desired fail-safe positions, bind
the transmitter to the receiver by pressing and holding the
bindbuttonsonthebackofthetransmitter/moduleand
turningonthetransmitter.Thesystemshouldconnectin
lessthan15seconds.Thereceiverisnowprogrammedfor
preset fail-safe.
Note:Fail-safepositionsarestoredviathestickand
switch positions on the transmitter during binding.
Standard Range Testing
Beforeeachflyingsession,andespeciallywithanew
model,youneedtoperformarangecheck.TheX95032.4
incorporates a range testing system which, when the bind
button on the transmitter is pressed and held, reduces the
output power, allowing a range check.
Range Testing the X9503 2.4
Press and hold the bind button
30 paces (90 feet)
1. Withthemodelrestingontheground,stand30paces
(approx. 90 feet) away from the model.
2. Face the model with the transmitter in your normal
flying position and depress and hold the bind button
onthebackofthetransmitter.Thiscausesreduced
power output from the transmitter.
3. Youshouldhavetotalcontrolofthemodelwiththe
button depressed at 30 paces (90 feet).
4. If control issues exist, call the JR Service Center at
1-877-504-0233forfurtherassistance.
Programming Preset Fail-Safe