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2.4GHz SS System 4channel Receiver
At this time we would like to thank you for purchasing the KR-409S. This product has adopted the current 2.4GH z SS system that allows
the use of multiple channels without the need to search for an available open channel like the bands of a crystal system. This product
corresponds to the transmitters that are sold by our company, listed below. Please read this instruction manual before using this product.
Also please read the instruction manual of the transmitter being used.
Corresponding
Technical Specifications
D.D.S. compatible Response Mode Compatible (ULTRA / ADVANCED / SUPER / NORMAL /
Transmitter EX-5UR
DD ADVANCED / DD HI SPEED / DD NORMAL) Fail safe system
RF-Module RF-901S / RF-902S
Power source
: 4.8v-7.4V Size : 28x18.3x18.5mm
Name of Parts
Antenna
Set Up Button
4
3
2
LED Lamp
1
B
For your safety, please note the handling and use of this product.
The contents of this display show a possibility of death or where a serious injury may occur
Warning
or a highly substantial damaging accident may occur.
●This product is manufactured for surface use radio controls. *Discontinue use for all other purposes.
Discontinue use in the event of a thunder storm. *There is danger of a lightening bolt striking the antenna of the transmitter.
●Discontinue use when consuming alcohol or medication that may hinder concentration or judgement.
*Unexpected accidents are caused with a judgement mistake.
●When rain and puddles are present, please discontinue use.
*There are times when water enters into the equipment and control will be lost.
●Only use the batteries specified in the instruction manual of the transmitter.
●To turn the system on, start by turning on the transmitter then the receiver.
To turn off the system, turn off the receiver first, then the transmitter in this sequence.
●Please be sure to use only our products for the transmitter and servos.
*Concerning the damage and the like, which is generated when combining products that are not our company's genuine products we do
not owe responsibility.
●Altering the transmission module is inhibited by law and is subjected to penal code violations. Resolution remodelling of all products may
result in the cause of a short and other accidents. In addition, if this product is altered we will refuse repair service.
●Please do not use this product inside an airplane, hospital, near any automatic control equipment, medical electrical machinery and
apparatus such as fire alarms. In addition with respect to the law, if this product effects other radio equipment and electronic equipment,
use must be discontinued at once.
This displays shows the possibility or a substantially damaging accident which can cause
Attention
injury.
●Please avoid storage in a place of high temperatures and high humidity because it may cause the breakdown,
damage and deformation of the product.
●Please note when using with an engine model, place where exhaust and the waste oil will not come into contact with the product.
*In case of submerging in oil or water, please send it out for repair.
●This product's performance is designed for use in the shown specified usage which is based on this instruction manual
and the instruction manual of the transmitter which is used. When the instructions are not understood,
please contact our service department for advise.
●After verifying the safety of use, think of all the accidents possible and please enjoy with responsibility.
Our company cannot owe responsibility from the nature of the radio control models
And the customer assumes all responsibilities that result from this product being used.
Antenna Installation Location
For electric
powered models.
Please keep distance to the receiver site, due to noise
sources of the battery, motor, ESC, etc. If possible.
Also keep away power condensers and shotki diodes
that generate noise from the receiver antenna if
possible.
Antenna
KR-409S
Instruction Manual
Number of Channels : 4CH
Weight : 7.5g
3 and 4: Channels 3 and 4 connect to
other devices.
2: Channel 2
Throttle servo or ESC are
connected.
When a channel is not in use
1: Channel 1
and to prevent dirt and dust,
Steering servo is connected.
attach the provided
B: Battery Channel
connector cap.
Battery is connected.
Installing the Antenna
Please use plastic mounts and a plastic antenna tube.
Please do not use a metal antenna mount because it
will create noise and problems.
To protect the main antenna, insert the antenna into
the antenna tube.
Also please do not disconnect or cut the antenna.
This will cause loss of signal.
Please do not cut the antenna wire. You will receive less range.
Please place antenna away from receiver battery, ESC, motor
Caution
and silicon wires and any other noise source. The antenna wire
for the receiver requires special attention.
Pairing
When using the receiver for the first time, the receiver must
store the ID number of the module and 'pairing' of the receiver
and module is necessary. Pairing must be performed when the
module or transmitter that is used is changed. When multiple
receivers are used, each receiver must go through the pairing
process at least once.
For RF-901S/RF-902S
While pressing the setup button,
transmit ter ON.(Continue to
press the button)
R e l e a s e B u t t o n ,W h e n L E D
goes out.
Preparation Completed when
LED semi-illuminated.(dark illumi-
nation)
For EX-5UR
Power switch
Fail-safe function
Fail-safe is when the receiver loses the radio signal of the
transmitter, and the function keeps channel 2 (throttle) in an
optional position. The configuration is usually full brake or
neutral.
WARNING
Please be sure to set the fail-safe.
Configuration instructions
Turn on the transmitter and the receiver and verify operation.
On the transmitter, hold the throttle to the position you would like
it to be set to. While holding the position, press the setup button
on the receiver.
Hold the setup button on the receiver until the LED light goes off
and release the button. Fail-Safe setting is complete.
If you change the position of the fail-safe
operation, please set again. We recommend
CAUTION
to set it again even if you modify the car
engine brake linkage.
compatibility with conventional models
KR-409S
When changing your conventional receiver to the KR-
409S receiver, please note the following.
Check the operating range of each channel and re-adjust
the travel, steering, throttle high point and brake points on
your transmitter. For electric cars, ESC (speed controller)
Antenna Tube
should also be reset to your transmitter.
If you use it without checking these setting, the
servo may become damaged or may cause abnor-
CAUTION
mal behavior.
1: Pairing mode for transmitter or RF module. The models differ
for each. Please refer to the manual of each model and the
figure on the left.
2: Prepare the transmitter or RF module when you are ready to
pair the KR-409S. (If you are using an electronic speed con-
troller in your car, make sure you have the power connected
and turned on when pairing.)
3: Hold the setup button on the KR- 409S and turn on the
power. Once the LED is lit, release the button and pairing is
complete.
4: Once you've completed the pairing, turn off the power to the
While pressing
receiver and transmitter and verify connection by turning the
Transmitter ON
the button
system on again.
Release
LED illuminates
Goes Out
Button
R e c e i v e r i s b r o u g h t c l o s e t o t h e
(3 seconds)
transmitter. While pressing the setup
button on the receiver, the receiver
power sourc e is tur ned on. ( When
p o w e r i s t u r n e d o n , t h e b u t t o n i s
released.)
Within 1m
Forward Key
Back Key
H o l d t h e Fo r w a r d a n d B a c k
k e y s d o w n a n d t u r n o n t h e
power switch.
' PA I R ' will be displayed and
flashing on the LCD screen and
the buzzer will sound.
Af ter about f ive sec onds the
buzzer and flash of the 'PAIR'
CAUTION
on the LCD screen will end.
Note in regard to use and carrier sense
When turning on the transmitter, the transmitter will scan for
a free frequency while the receiver scans for its paired
module. This is called 'carrier sense'.
WARNING
About Repairs
If you request a repair, please report the fault in as much detail
as possible. This will aid in knowing the problem and parts to
be used and repair time.
When you believe you need service.
Please refer to your manual once more and please inspect.
When you do not understand something, please inquire our
service department.
When inquiring to our service department about a breakdown,
please include as much detail as possible of the contents
mentioned below about your problem.
Name of products (battery, car, transmitter & motor) used.
When breaking down, usage condition and description of breakdown
condition.
Your address, name and telephone number.
When a repair is being requested, please be sure to send the
memo which includes the above mentioned contents in as
much detail as possible.
LED lights up and you're
done.
I f i t i s f l a s h i n g o r d i m ,
Receiver
please try to set again.
LED
Illuminated
Pairing Complete
While Press
Button
After turning off the power
of the transmitter and the
Power On
receiver once, operation is
read
●If you are having difficulties pairing, make sure
that you are not around a wireless LAN or micro-
w a v e . I f y o u a r e p l e a s e m o v e t o a d i f f e r e n t
location and try again.
●After pairing is complete, Please turn off in the
order of receiver transmitter.
In order to be able to do 'carrier sense' appropri-
ately, the location where power of the transmitter is
turned on should be as close as possible to where
the model will be operated.
KONDO KAGAKU CO.,LTD.
Web Site :www.kopropo.co.jp
Phone:+81-3-3807-7648
4-17-7 Higashi-Nippori,Arakawa-ku,
Tokyo Japan 116-0014
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