JR PCM9X II User manual

PCM9X II
9-CHANNEL COMPUTER RADIO SYSTEM
Instruction Manual

General Section 2

3 General Section
Contents – General Section
Section : Using this manual 5
Section 2: Features 5
R770 Receiver 5
R900 Receiver 5
Section 3: Component Specifications 6
Battery Charging 8
PCM9X II Transmitter Features (Front) 9
PCM9X II Transmitter Features (Rear) 0
PCM9X II Transmitter Features (Internal)
Control Stick Tension Adjustment
Advanced Digital Trims 2
Control Stick Length 2
R900S Receiver Connection Diagram 2
Direct Servo Control (DSC) 3
Neckstrap Attachment 3
Frequency Notes/Aircraft Only Frequencies 4
Installation Requirements 5
Flash Memory 5
Battery Alarm and Display 5
SYSTEM MODE – Functions Common to ACRO, GLIDER and HELI model types 6
Model Select / Copy 7
Model Name 8
Type Select 8
Model Reset 9
Modulation 9
Transfer – Transfer the model to another transmitter or to DataSafe 20
Transfer a model from the PCM9X II – (Transfer function) 20
Transfer a model to the PCM9X II – (Transfer function) 2
Stick Mode 22
Stick Direction 23
FUNCTION MODE - Functions Common to GLIDER, ACRO and HELI model types 24
Throttle Cut and Trim Select 24
Trainer System 25
PCM9X II used as Master (Instructor) – (Trainer System) 25
PCM9X II used as Slave (Student) – (Trainer System) 26
Fail Safe 27
Dual Rates and Exponential Curves 28
Sub Trim Usage and Mechanical Advantage 29

General Section 4
Servo Precautions 30
General notes 3
Aviation Regulations 32
Daily Flight Checks 32
Warranty Information 33

5 General Section
Section 1: Using this manual
This Manual is divided into three specific sections:
Airplane, Sailplane and Helicopter.
In this manual you will find the specifications for the
radio and its various components and accessories. In
addition, guidelines for the installation have been
included. Instructions for setting all the functions and
programs are presented in the three sections of the
manual: Airplane, Sailplane and Helicopter. These
features are discussed in the same order that they
would normally be needed to set up a typical aircraft,
servo winged sailplane and helicopter respectively. An
explanation of the use and purpose of each feature is
provided, followed by a labeled illustration of its
respective LCD display.
A blank data sheet has been included at the end of
each section. Once all data has been input for a
particular model, it is highly recommended that you
record it on a copy of the sheet provided.
Section 2: Features
The computer-designed, ergonomically-styled
transmitter case ensures a comfortable fit in your
hands. You will also be introduced to our exclusive
“Rolling Selector” on the face of the transmitter for fast
and effortless movement through any programming
sequence.
The ultra-precision control sticks offer adjustable spring
tensions and length. The throttle stick offers a ratchet in
Airplane/Sailplane configuration. Stick modes 1-4 are
menu selectable.
30-model memory storage allows programming of all
parameters of thirty separate airplanes, sailplanes or
helicopters; you can program more than one setup for a
single aircraft, allowing you to instantly change the flight
characteristics.
R770 Receiver
R770 ( asic Air and Sailplane
Systems)
The R770 is a high-performance 7 channel PCM single-
conversion receiver with 10KHz super narrow band
ABC&W circuitry.
A narrow band ceramic filter for high-signal selectivity
assists in rejecting cross modulations from other
common radio frequencies, such as RC transmitters or
local paging systems.
This receiver features Direct Servo Control (DSC) for
control of servos without radio frequency output.
The receiver has low current consumption.
The R770’s Slimline design allows it to fit into most
model applications.
R900 Receiver
R900 (Advanced Air, asic & Advanced
Helicopter Systems)
The R900 is a high-performance 9 channel PCM single-
conversion receiver with 10KHz super narrow band
ABC&W circuitry.
A narrow band ceramic filter for high-signal selectivity
assists in rejecting cross modulations from other
common radio frequencies, such as RC transmitters or
local paging systems.
This receiver features Direct Servo Control (DSC) for
control of servos without radio frequency output.
The receiver has low current consumption.
The R900’s credit card size design allows it to fit into
most model applications.

General Section 6
Section 3: Component Specifications
Component Specifications
Type Airplane
System Name PCM9X II
Transmitter Body NET-N239ES
Receiver R900
Charger NEC-322AUS
Airborne Battery 00mah
Servos 4 ea ES539
Accessories Deluxe Switch
Servo Accessories
Hex Wrench
Instruction Manual
Transmitter Specifications
Type Airplane
Model Number NET-N239ES
Encoder 9-channel computer system
RF Module Plug-in-Module
Modulation PPM / SPCM / ZPCM
Output Power Approximately 750mw
Current Drain 200ma
Power Source .2Vx8 Ni-Cd (9.6V) 600Mah
Output Pulse 000-2000 ( 500 neutral)
Receiver Specifications
Type 7 Channel SPCM 9 Channel SPCM
Model Number R770 R900
Type 7-ch/SPCM- ABC&W/Micro
9-ch/SPCM-ABC&W
Frequency 36 Mhz 36 Mhz
Sensitivity
(Microseconds) 5uS Minimum 5uS Minimum
Selectivity 8KHz/5 dB 8KHz/5 dB
Weight gm 20 gm 28 gm
Receiver Antenna
39"/99cm for all aircraft
frequencies
39"/99cm for all aircraft
frequencies

7 General Section
Servo Specifications
Type ES-539
Torque 4.8kg.cm
Speed 0.23 sec
Weight 38 gm
Size mm (L x W x H) 32.5 x 9 x 38.5 mm
Ballbearing Yes
Motor Ferrite
Airborne attery Pack Specifications
Type Airplane
Model Number B 00
Voltage 4.8V
Capacity 00 mAH
Size (in) (L x W x H) 2.24 x 0.53 x .70
Weight (oz) 4.9
Charger Specifications
Type Airplane
Model Number NEC-322AUS
Input Voltage AC 240V
Output Current 50 mA Tx/ 00 mA Rx
Charging Time 5 Hours

General Section 8
attery Charging
Transmitter/Receiver
Note: It is imperative that you fully charge both the
transmitter and the receiver battery packs prior to
each trip to the field. To do so, leave the charger
and batteries hooked up overnight (1 hours). The
first charge should be approximately 20–24 hours
in order to fully charge both battery packs to peak
capacity.
The charger supplied with this system is designed to
recharge your batteries at a rate of 5mAh for the
transmitter and 150mAh for the receiver battery pack.
Transmitter Only
The center pin on all JR® Remote Control Systems 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 do not apply in this instance. You must
make sure that the center pin of your JR transmitter is
always connected to the negative voltage for correct
polarity hookup.
Important: Please note that the charging polarity of
the transmitter and receiver are different.
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 compatibility issues with your
radio. Seek expert advice to avoid possible damage.
During the charging operation, the charger’s
temperature is slightly elevated. This is normal.

9 General Section
PCM9X II Transmitter Features (Front)
Switch Labels Airplane Menus Sailplane Menus Heli Menus
RUDD D/R / AUX4 RUD D/R RUD D/R RUD D/R
T.HOLD / MIX MIX SW BTFL SW HOLD SW
ELEV D/R ELE D/R ELE D/R ELE D/R
FLAP / AUX2 FLAP SW AUX4 SW AUX2 SW
GEAR GEAR SW MOTO S/W GEAR SW
AILE D/R AIL D/R AIL D/R AIL D/R
F.MODE / AUX4 / AUX2 AUX2 SW FMOD SW FMOD SW
(Spoiler Stick) SPOI ST
TRN / SN ROLL SNAP SW TIME SW
(Menu Button) TIM KEY
(Left Side Lever) FLAP LV FLAP LV Pit.T LEV
(Right Side Lever) AUX3 LV AUX3 LV AUX3 LEV
Switch Naming in the Menus
Flap Trim/Hover Pitch Trim
Throttle Hold/Mix Switch
Rudder D/R / AUX4 Switch
Elevator D/R
A
ileron D/R
Flap/AUX2 Switch
Flap Lever/
Pitch Trim Lever
Antenna
Neckstrap Attachment
Aux Trim/
Hover Throttle Trim
Handle
Trainer/Timer/
Snap Roll Switch
Flight Mode/
AUX4/AUX2 Switch
AUX3 Lever
Gear Switch
Aileron/Throttle Stick
Aileron Trim
Throttle Trim
Rolling Selector
LCD Display
Rudder/Elevator Stick
Elevator Trim
Rudder Trim
Power Switch
Menu Buttons
Transmitter shown with stick mode selected

General Section 0
PCM9X II Transmitter Features (Rear)
CAUTION: THE BATTERY CONNECTION IS KEYED SO THAT IT CAN ONLY BE PLUGGED IN ONE DIRECTION.
DO NOT FORCE
RF Module
Battery Cover
Direct
Servo
Connection/
Trainer Lead

General Section
PCM9X II Transmitter Features (Internal)
Control Stick Tension Adjustment
Remove the six transmitter back screws as shown on
the previous page. Remove the transmitter back, being
careful not to cause damage to any components.
Adjust each screw for desired tension (counter-
clockwise to loosen stick feel; clockwise to tighten stick
feel). When adjusting the throttle ratchet tension, make
sure that the adjusting screw does not touch the PC
board after adjustment is complete.
Rudder
Tension Screw
Elevator
Tension Screw
Throttle
Tension Screw
Aileron
Tension Screw

General Section 2
Advanced Digital Trims
The PCM9X II’s digital trims feature the Direct Access
display function. While at 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 PCM9X II’s Aileron, Elevator, Throttle
and Rudder trim levers feature an audible center trim
beep. This is helpful in determining the trim levers
center position during flight.
By using the Trim Step Function located in the System
Mode, the movement of the ADT trims can be fine
tuned as needed to match your specific application
Please also note that unlike conventional mechanical
trim levers, when the PCM9X II transmitter is in the off
position, no changes can be made to the trim values
during transportation.
Control Stick Length
To adjust the stick length, use the 2mm Allen wrench
(supplied with your PCM9X II transmitter) to unlock the
set screw. Turn the wrench counter-clockwise to loosen
the screw. Then, turn the stick clockwise to shorten or
counterclockwise to lengthen. After the control stick
length has been adjusted to suit your flying style,
tighten the 2mm set screw.
If you desire longer sticks, JR® offers a stick
(JRPA047) that is approximately one inch longer than
standard. This stick, crafted from bar stock aluminum, is
available at your local JR dealer.
R900S Receiver Connection Diagram
To Charger
Antenna
Battery

3 General Section
Direct Servo Control (DSC)
For proper DSC hook-up and operation:
1. Leave the transmitter power switch in the Off
position. The transmitter will not transmit any radio
frequency (RF) in this position.
2. Plug the DSC cord (purchased separately, JRPA132)
into the DSC port in the rear of the transmitter.
3. The encoder section of the transmitter will now be
operational and the LCD display will be lit.
4. Plug the other end of the DSC Cord into the receiver
charge receptacle. (You must use a 3-wire switch
harness, such as the Deluxe Switch Harness –
JRPA001, or a JR Charge switch – JRPA004, for the
DSC function to work.) Turn the switch harness to
the On position.
Note: When you install the charging jack, be sure
to hook the charging jack receptacle securely into
the switch harness charge cord.
Why you should use the DSC function:
1. The DSC enables you to check the control surfaces
of your aircraft without drawing the fully operational
200mAh from your transmitter battery pack. Instead,
you will only draw approximately 70mAh when using
the DSC function.
2. The DSC function allows you to make final
adjustments to your airplane without transmitting any
radio signals. Therefore, if another pilot is flying on
your frequency, you can still adjust your aircraft and
not interfere with the other pilot’s aircraft. This is also
a tremendous tool to use in the original setup of your
aircraft while still in the workshop. Because of the
lower current draw on your transmitter, your working
time at the bench will be extended between charges.
Note: This function is for bench-checking your
aircraft only.
Neckstrap Attachment
An eyelet is provided on the face of the PCM9X II
transmitter that allows you to connect a Neck Strap
(JRPA023). This hook has been positioned so that your
transmitter has the best possible balance when you use
the neck strap.

General Section 4
Frequency Notes/Aircraft Only Frequencies
The PCM9X II transmitter employs a plug-in module for
the transmitter. The PCM9X II can transmit in either
Pulse Code Modulation (SPCM or ZPCM) or Pulse
Position Modulation (PPM, commonly referred to as
FM).
Be certain to observe the following guidelines:
Do not operate your transmitter when another
transmitter is using the same frequency, regardless of
whether the second transmitter is PCM, PPM (FM) or
AM. You can never operate two transmitters on the
same frequency simultaneously without causing
interference.
Aircraft-Only Frequencies
JR® Transmitters and receivers are available in 3 MHz
frequencies in Australia for use with model aircraft.
Employing 3 MHz frequencies does not require a
special operator’s license from the Australian
Communications Authority.
Frequency Chart
36 MHz requires no special license to operate.
Ch Freq Ch Freq Ch Freq
60 36.0 0 629 36.290 50 40.665
603 36.030 63 36.3 0 53 40.695
605 36.050 633 36.330
607 36.070 635 36.350
609 36.090 637 36.370
6 36. 0 639 36.390
6 3 36. 30 64 36.4 0
6 5 36. 50 643 36.430
6 7 36. 70 645 36.450
6 9 36. 90 647 36.470
62 36.2 0 649 36.490
623 36.230 65 36.5 0
625 36.250 653 36.530
627 36.270 655 36.550

5 General Section
Installation Requirements
It is extremely important that your radio system be
correctly installed in your model. Here are a few
suggestions for installing your JR® equipment:
1. Wrap the receiver in protective foam rubber that is no
less than 1 cm inch thick. Secure the foam to the
receiver with rubber bands. This protects the receiver
in the event of a crash or a very hard landing.
2. The servos should be mounted 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.
3. 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.
4. 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.
5. Mount the receiver antenna firmly to the airplane to
ensure that it will not become entangled in the
propeller or control surfaces.
Flash Memory
All preprogrammed data is protected by a flash memory
that guards against main transmitter battery failure.
attery Alarm and Display
When the transmitter voltage drops below 9.0 volts DC,
the display flashes “BATT LOW” and an alarm sounds.
If you are flying when this occurs, land immediately.

General Section 6
SYSTEM MODE –
Functions Common to ACRO, GLIDER and HELI model types
System mode contains the foundational programming.
System mode screens include model name, model
reset, modulation, data transfer, etc.—functions that are
typically set once and then are seldom changed or
adjusted. This section describes the system functions
that are common to all 3 model types. System functions
that are specific to each model type are covered in the
each of the acro, glider and heli sections.
To enter System Mode–
Press ENT and hold while turning on the transmitter. The screen should appear as follows.
Note: In HELI mode the Wing Type function is replaced by the Swash Type function.
System mode contains the follow screens:
Info Display
Model Select / Copy Pg 17
Model Name Pg 17
Type Select Pg. 18
Model Reset Pg. 19
Modulation Pg. 19
Transfer Pg 20
Trainer Pg 22
Stick Mode Pg 22
Stick Direction Pg 22

7 General Section
Model Select / Copy
Model select allows up to 30 different models to be
stored and selected.
Note: When setting up a new model it is recommended
that an unused model memory is selected. If a current
model memory is selected it’s recommended that the
model be reset to factory default setting before
programming the new model. See model reset on page
19.
Model Select
1. In the SYSTEM Menu, highlight and select Model
SEL using the Selector.
2. Use the Selector to highlight and select the desired
model number to be used.
3. Return to the SYSTEM Menu by pressing the LIST
button.
Copy Function
1. Highlight and select Model SEL in the SYSTEM
Menu. Then highlight and select Select to obtain the
Copy display. The display shows the currently
selected model on top with a down-arrow pointing to
the lower model memory that the current model will
be copied into.
To change the lower model memory that is to
receive the copy o the current model, highlight and
select the lower model name and number. Then scroll
to an unused model memory or a memory that contains
data that is no longer required, and select it.
2. Verify that the top model is the model that is to be
backed-up and the lower model is empty or contains
a model that is no longer required. When satisfied
that all is well, press the CLR button on the left side
of the display next to COPY. The entire contents of
the currently selected model is copied to the lower
model on the display and there is now a complete
backup of the current model. The upper and lower
model memory names are now the same because
the two model memories are now identical in every
regard.

General Section 8
Model Name
The model name screen allows each model to be given
an eight digit name or number. This is convenient for
identifying a model or the channel number the model is
on. The model’s name will appear in the upper right
corner of the main info screen.
1. In the SYSTEM Menu, highlight and select MDL
Name using the Selector.
2. The cursor (indicates where the next character will
be placed) is positioned at the beginning of the
model name. Press the Selector to obtain a list of
available characters.
3. Highlight and select the desired character to form the
model name. After the character is selected, rotate
the Selector to position the cursor where the next
character is to be placed and press the Selector to
obtain the character list again. Repeat until the model
name is completed.
4. Return to the SYSTEM Menu by pressing the LIST
button.
Type Select
Type select allows the model type to be selected.
Model types include glider, acro or heli. Note: When
changing model types the programming information will
be reset to the factory default setting loosing the
previous settings.
1. In the SYSTEM Menu, highlight and select Type
SEL using the Selector.
2. Highlight and select the desired model type using the
Selector.
3. Return to the SYSTEM Menu by pressing the LIST
button.

9 General Section
Model Reset
Model Reset is used to return the program to the
factory default settings.
1. In the SYSTEM Menu, highlight and select MDL
Reset using the Selector.
2. Press the CLR button that is next to RES on the
display.
3. Press the lowermost button next to YES on the
display to reset all data for this model.
4. Return to the SYSTEM Menu by pressing the LIST
button.
Modulation
The PCM9X II system supports three types of
modulation – ZPCM, SPCM and PPM (FM). The correct
modulation type must be selected to match the receiver
in the aircraft or the system will not function.
1. In the SYSTEM Menu, highlight and select
MODULAT. using the Selector.
2. Highlight and select either ZPCM or SPCM or PPM
to match the receiver in the aircraft.
3. Return to the SYSTEM Menu by pressing the LIST
button.

General Section 20
Transfer – Transfer the model to another transmitter or to DataSafe
The TRANSFER function can be found in the SYSTEM
Menu and is used to copy the contents of a model
memory to another PCM9X II transmitter or to a
DataSafe device on a Personal Computer (PC). It is
also used to receive data for a model, either from
another PCM9X II transmitter or from a DataSafe unit.
Transfer a model from the PCM9X II – (Transfer function)
1. Hold the ENT button while plugging the trainer cord
into the back of the transmitter to obtain the SYSTEM
Menu.
Plug the other end of the trainer cord into another
PCM9X II transmitter while holding the ENT button
down and prepare that transmitter for Receive as
described below. Or, plug the other end of the trainer
cord into a DataSafe unit and prepare the DataSafe to
receive.
2. Highlight and select TRANSFER in the SYSTEM
Menu to obtain the Transfer display.
3. The model to be transferred must be the currently
selected model. If the model to be transferred is not
currently selected, see Model SEL in the SYSTEM
Menu to select the model to be transferred to
another PCM9X II or DataSafe unit.
4. When the receiving device is ready, press the CLR
button next to START on the left side of the display.
The data for the currently selected model is
transferred to the receiving device.