Graupner 4754, mx-12 User guide
Contents
General Notes
Safety Notes................................................................... 2
Introduction.................................................................... 3
Description of radio control system................................ 7
Charging the transmitter battery..................................... 8
Transmitter description................................................... 9
Direct servo control.......................................................11
Connections and installations
-> For Airplane.............................................................. 12
-> For Helicopter............................................................13
Key input and display.................................................... 14
Alarm and error display................................................. 14
Input mode and function............................................... 15
Program
Function mode.............................................................. 16
System mode................................................................17
List mode...................................................................... 18
Function mode AIRPLANE
Dual Rates and Exponential......................................... 19
Servo Reversing........................................................... 19
Sub Trim....................................................................... 20
Travel Adjust................................................................. 20
Elevator to flap mixing.................................................. 21
Aileron to rudder mixing............................................... 21
Throttle Cut switch........................................................ 22
Flap System................................................................. 22
Differential aileron mixing............................................. 23
Programmable Mixing (1~4)......................................... 23
Fail Safe....................................................................... 24
Servo Travel Screen..................................................... 25
Function mode HELICOPTER
Dual Rates and Exponential.........................................26
Servo Reversing........................................................... 26
Sub Trim....................................................................... 27
2 Contents
Travel Adjust................................................................. 27
CCPM Swashplate Mixing............................................ 28
Throttle Cut Switch....................................................... 29
Throttle Hold................................................................. 29
Throttle Curves............................................................. 30
Pitch Curves................................................................. 31
Revolution Mixing (Non-heading lock Gyro only)......... 33
Programmable Mixing (1~2)......................................... 33
Fail Safe....................................................................... 34
Servo Travel Screen..................................................... 35
System Mode
Model Selection............................................................ 36
Model Name Entry........................................................ 36
Model Type Selection................................................... 37
Model Copy Function.................................................... 37
Modulation Selection.................................................... 38
Stick Mode.................................................................... 38
Trainer Function............................................................ 39
Switch Select................................................................ 40
Wing Type Selection..................................................... 41
Swashplate Selection................................................... 44
Appendix
Approved operating frequencies.................................. 45
Approval Certificate / Conformity.................................. 46
Guarantee certificate.................................................... 47
The sole purpose of this manual is to provide information. It is subject to modification at any time, and must
not be considered as any form of obligation on the part
of the GRAUPNER company. GRAUPNER accepts no
responsibility or liability for errors or inaccuracies which
may be found in the information section of this manual.
Environ mental Protection Notes
When this product comes to the end of its useful life,
you must not dispose of it in the ordinary domestic waste. The correct method of disposal is to take it to your
local collection point for recycling electrical and electronic equipment. The symbol shown here, which may be
found on the product itself, in the operating instructions
or on the packaging, indicates that this is the case.
Individual markings indicate which materials can be
recycled and re-used. You can make an important contribution to the protection of our common environment
by re-using the product, recycling the basic materials or
recycling redundant equipment in other ways.
Remove batteries from your device and dispose of them
at your local collection point for batteries.
If you don’t know the location of your nearest
disposal centre, please enquire at your local
council office.
Safety notes
Please read carefully!
We all want you to have many hours of pleasure in our
mutual hobby of modelling, and safety is an important
aspect of this. It is absolutely essential that you read
right through these instructions and take careful note of
all our safety recommendations. If you are a beginner to
the world of radio-controlled model aircraft, boats and
cars, we strongly advise that you seek out an experienced modeller in your field and ask him for help and
advice. These instructions must be handed on to the
new owner if you ever sell the transmitter.
Application
This radio control system may only be used for the
purpose for which the manufacturer designed it, i.e. for
operating radio-controlled models which do not carry humans. No other type of use is approved or permissible.
Safety notes
SAFETY IS NO ACCIDENT
and …
RADIO-CONTROLLED MODELS ARE NOT
PLAYTHINGS
Even small models can cause serious personal injury
and damage to property if they are handled incompetently.
Technical problems in electrical and mechanical systems
can cause motors to rev up or burst into life unexpectedly, with the result that parts may fly off at great speed,
causing considerable injury.
Short-circuits of all kinds must be avoided at all times.
Short-circuits can easily destroy parts of the radio control system, but even more dangerous is the acute risk of
fire and explosion, depending on the circumstances and
the energy content of the batteries.
The circumstances and the energy content of the
batteries.
Aircraft and boat propellers, helicopter rotors, open
gearboxes and all other rotating parts which are driven
by a motor or engine represent a constant injury hazard.
Do not touch these items with any object or part of your
body. Remember that a propeller spinning at high
speed can easily slice off a finger! Ensure that no
other object can make contact with the driven components.
Protect all electronic equipment from dust, dirt, damp,
and foreign bodies. Avoid subjecting the equipment
to vibration and excessive heat or cold. Radio control
equipment should only be used in „normal“ ambient temperatures, i.e. within the range -15°C to +55°C. Avoid
subjecting the equipment to shock and pressure.
Check the units at regular intervals for damage to cases
and leads. Do not re-use any item which is damaged
or has become wet, even after you have dried it out
thoroughly. Use only those components and accessories
which we expressly recommend. Be sure to use only
genuine matching GRAUPNER connectors of the same
design with contacts of the same material. Use only
genuine GRAUPNER plug-in crystals on the appropriate frequency band. When deploying cables note
that they must not be under tension, and should never
be bent tightly or kinked, otherwise they may fracture.
Avoid sharp edges which could wear through the cable
insulation.
Check that all connectors are pushed home firmly
before using the system. When disconnecting components, pull on the connectors themselves - not on the
wires.
It is not permissible to carry out any modifications to
the RC system components. Avoid reverse polarity
and short-circuits of all kinds, as the equipment is not
protected against such errors.
Installing the receiving system and deploying the
receiver aerial
In a model aircraft the receiver must be packed in soft
foam and stowed behind a stout bulkhead, and in a
model boat or car should be protected effectively from
dust and spray.
The receiver must not make contact with the fuselage,
hull or chassis at any point, otherwise motor vibration
and landing shocks will be transmitted directly to it.
When installing the receiving system in a model with a
glowplug or petrol engine, be sure to install all the components in well protected positions so that no exhaust
gas or oil residues can reach the units and get inside
them. This applies above all to the ON / OFF switch,
which is usually installed in the outer skin of the model.
Secure the receiver in such a way that the aerial, servo
leads and switch harness are not under any strain.
The receiver aerial is permanently attached to the receiver. It is about 100 cm long and must not be shortened
or extended. The aerial should be routed as far away
as possible from electric motors, servos, metal pushrods and high-current cables. However, it is best not to
deploy the aerial in an exactly straight line, but to angle
it: e.g. run it straight to the tailplane, then leave the final
10 - 15 cm trailing down, as this avoids reception „blind
spots“ when the model is in the air. If this is not possible
we recommend that you lay out part of the aerial wire
in an S-shape inside the model, close to the receiver if
possible.
Safety notes 3
Safety notes
Installing the servos
Always install servos using the vibration-damping
grommets supplied. The rubber grommets provide
some degree of protection from mechanical shocks and
severe vibration.
Installing control linkages
The basic rule is that all linkages should be installed in
such a way that the pushrods move accurately, smoothly and freely. It is particularly important that all servo
output arms can move to their full extent without fouling
or rubbing on anything, or being obstructed mechanically at any point in their travel.It is important that you
should be able to stop your motor at any time. With a
glow motor this is achieved by adjusting the throttle so
that the barrel closes completely when you move the
throttle stick and trim to their end-points.Ensure that no
metal parts are able to rub against each other, e.g. when
controls are operated, when parts rotate, or when motor
vibration affects the model. Metal-to-metal contact causes electrical „noise“ which can interfere with the correct
working of the receiver.
Always extend the transmitter aerial fully before
operating your model.
Transmitter field strength is at a minimum in an imaginary line extending straight out from the transmitter aerial.
It is therefore fundamentally misguided to „point“ the
transmitter aerial at the model with the idea of obtaining
good reception.
When several radio control systems are in use on adjacent channels, the pilots should always stand together
in a loose group. Pilots who insist on standing away
from the group endanger their own models as well as
those of the other pilots.
Pre-flight checking
If there are several modellers at the site, check carefully
with all of them that you are the only one on „your“
channel before you switch on your own transmitter.If two
modellers switch on transmitters on the same channel,
the result is interference to one or both models, and the
usual result is at least one wrecked model.
Before you switch on the receiver, ensure that the throttle stick is at the stop / idle end-point.
Always switch on the transmitter first, and only then
the receiver.
Always switch off the receiver first, and only then
the transmitter.
If you do not keep to this sequence, i.e. if the receiver
is at any time switched on when „its“ transmitter is
switched off, then the receiver is wide open to signals
from other transmitters and any interference, and may
respond. The model could then carry out uncontrolled
movements, which could easily result in personal injury
or damage to property. The servos may run to their
end-stops and damage the gearbox, linkage, control
surface etc. Please take particular care if your model
is fitted with a mechanical gyro: Before you switch your
receiver off, disconnect the power supply to ensure that
the motor cannot run up to high speed accidentally. The
gyro can generate such a high voltage as it runs down
that the receiver picks up apparently valid throttle commands, and the motor could respond by unexpectedly
bursting into life.
Range checking
Before every session check that the system works
properly in every respect, and has adequate range. This
means checking that all the control surfaces respond
correctly and in the appropriate direction to the transmitter commands at a suitable ground range.
Repeat this check with the motor running, while a friend
holds the model securely for you.
Operating your model aircraft, helicopter, boat or car
Never fly directly over spectators or other pilots, and
take care at all times not to endanger people or animals.
Keep well clear of high-tension overhead cables. Never
operate your model boat close to locks and full-size vessels. Model cars should never be run on public streets
or motorways, footpaths, public squares etc.
Checking the transmitter and receiver batteries
It is essential to stop using the radio control system and
recharge the batteries well before they are completely
discharged. In the case of the transmitter this means
- at the very latest - when the message „Battery must
be charged“ appears on the screen, and you hear an
audible warning signal. It is vital to check the state of the
receiver battery at regular intervals. When the battery
is almost flat you may notice the servos running more
slowly, but it is by no means safe to keep flying or running your model until this happens. Always replace or
recharge the batteries in good time. Keep to the battery
manufacturer’s instructions and don’t leave the batteries
on charge for longer than stated. Do not leave batteries
on charge unsupervised. Never attempt to recharge dry
cells, as they may explode.
Rechargeable batteries should always be recharged
before every session. When charging batteries it is important to avoid short-circuits. Do this by first connecting
the charge lead banana plugs to the charger, taking
care to maintain correct polarity. Only then connect the
charge lead to the transmitter or receiver battery.
4 Safety notes
Safety notes
Disconnect all batteries and remove them from your model if you know you will not be using it in the near future.
Capacity and operating times
This rule applies to all forms of electrical power source:
battery capacity is reduced every time you charge it.
At low temperatures capacity is greatly reduced, i.e.
operating times are shorter in cold conditions.
Frequent charging, and / or the use of maintenance
programs, tends to cause a gradual reduction in battery
capacity. We recommend that you check the capacity of
all your rechargeable batteries at least every six months,
and replace them if their performance has fallen off
significantly.
Use only genuine GRAUPNER rechargeable batteries!
Suppressing electric motors
All conventional electric motors produce sparks between
commutator and brushes to a greater or lesser extent
depending on the motor type; the sparking generates
serious interference to the radio control system. In
electric-powered models every motor must therefore be
effectively suppressed.
Suppressor filters effectively eliminate such interference,
and should always be fitted. Please read the notes and
recommendations supplied by the motor manufacturer.
Refer to the main GRAUPNER FS catalogue for more
information on suppressor filters.
Servo suppressor filter for extension leads
Order No. 1040
Servo suppressor filters are required if you are obliged
to use long servo extension leads, as they eliminate the
danger of de-tuning the receiver. The filter is connected
directly to the receiver input.
In very difficult cases a second filter can be used, positioned close to the servo.
Using electronic speed controllers
Electronic speed controllers must be chosen to suit the
size of electric motor which they will control. There is
always a danger of overloading and possibly damaging
the speed controller, but you can avoid this by ensuring
that the controller’s current-handling capacity is at least
half the motor’s maximum stall current.
Particular care is called for if you are using a „hot“ (i.e.
upgrade) motor, as any low-turn motor (small number of
turns on the winding) can draw many times its nominal
current when stalled, and the high current will wreck the
speed controller.
Electrical ignition systems
Ignition systems for internal combustion engines can
also produce interference which has an adverse effect
on the working of the radio control system.
Electrical ignition systems should always be powered by
a separate battery - not the receiver battery.
Be sure to use effectively suppressed spark plugs and
plug caps, and shielded ignition leads.
Keep the receiving system an adequate distance away
from the ignition system.
Caution:
Radio control systems may only be operated on the
frequency bands and spot frequencies approved in each
EU country. You will find information on frequencies in
the section entitled „Approved operating frequencies“.
It is prohibited to operate radio control systems on any
other frequency, and such misuse will be punished by
the relevant authorities.
Static charges
Lightning causes magnetic shock waves which can
interfere with the operation of a radio control transmitter even if the thunderstorm actually occurs several
kilometres away. For this reason cease flying operations immediately when you notice an electrical storm
approaching.
Static charges through the transmitter aerial can be
life-threatening!
Care and maintenance
Don’t use cleaning agents, petrol, water or other
solvents to clean this equipment. If the case, the aerial
etc. gets dirty, simply wipe the surfaces clean with a soft
dry cloth.
Liability exclusion / Compensation
As manufacturers, we at GRAUPNER are not in a position to influence the way you install, operate and maintain
the radio control system components. For this reason
we are obliged to refute all liability for loss, damage
or costs which are incurred due to the incompetent or
incorrect use and operation of our products, or which
are connected with such operation in any way.
Unless otherwise prescribed by law, the obligation of the
GRAUPNER company to pay compensation is limited
to the invoice value of that quantity of GRAUPNER
products which was immediately and directly involved in
the event in which the damage occurred. This does not
apply if GRAUPNER is found to be subject to unlimited
liability according to binding legal regulation on account
of deliberate or gross negligence.
Safety notes 5
Computer system mx-12
6 channel digital proportional radio control system
Computer radio control system with 10 model
memories, incorporating high-level technology. Modern computer system for excellent reliability and
security. Simplified rotary programming technology
for straightforward programming.
High-contrast graphic screen provides an accurate
display of the transmitter battery voltage, modulation, model type, model name, model memory
number, set-up data, throttle and collective pitch
curves and model operating time.
• All-purpose radio control system, fully expanded as
standard
• High-quality radio control system for F3A, F3B, F3C,
F3D, F3E model aircraft, deltas and V-tail models.
Fully expanded, offering 6 channels: 4 proportional
channels with trims, 2 switched channels
• Convenient mode selector for simple switching
between stick MODES 1 - 4 (throttle right / left).
All mixer, set-up and reverse memory data are
automatically converted if you switch modes
• Convenient wing mixer programs:
DIFFERENTIAL FLAPERON (aileron differential
mixer), ELEVON (deltas: aileron-elevator mixer),
V-TAIL (V-tail models: elevator - rudder mixer)
• Convenient swashplate programs:
SWASHPLATE TYPE (swashplate: 1 servo, 2 ser vos 180°, 3 servos 120°, 3 servos 90°)
• 10 model memories, with transfer of all essential
programming and set-up parameters
• Compatibility with FM and FMsss (PPM) receivers
as well as SPCM receiving systems
• High-contrast Multi-Data-Display LCD screen provi des accurate monitoring even in bright sunlight;
screen displays information such as mixer input
data, set-up values, directions of rotation, trim
values, programming information in multi-function
programs, and transmitter battery operating voltage
• Wide range of mixer system, plus precisely vari able end point and centre positions, making the
system suitable for the demanding operator of model
aircraft, boats and cars.
• REVERSE function, programmable for six servos
• MONIT: servo travel monitor for six servos
• MODEL NAME and model number programmable
separately
6 Introduction
• MODULATION: switchable PPM / SPCM
• DUAL RATE / EXPO switchable to two positions and
programmable for three servo functions, available
range 5 to 125%.
• DIFFERENTIAL FLAPERON (differential aileron
mixer)
• SUB-trim memory system for offsetting all servo
centres; also for adjusting older servo types and
servos with no standard centre
• TRAVEL ADJUST: separate travel adjustment for
both end-points of all servos adjustment range 0 to
150%. New type of adjustment enables program ming of symmetrical and asymmetrical servi travels,
e.g. to compensate for one warped wing or special
applications.
• DSC socket for connection to flight simulator
• Integral visual and audible alarm system for trans-
mitter battery and Lithium back-up battery
Set contents
mx-12 micro-computer transmitter with integral NiMH 8
NH-1700 TX battery, R 700 receiver on the appropriate
frequency, pair of crystals on the same frequency,
C 577 servo, switch harness, battery holder for receiving
system
Six-channel micro-computer radio control system,
fully expanded. Switchable PPM / SPCM modulation
(4 proportional functions with trims, 2 switched
functions)
Specification mx-12 transmitter
Transmission system FM / FMsss (PPM) and SPCM
FMsss crystals 35 MHz band; Order No. 3864.61 - .80
40 MHz band; Order No. 4064.50 - .92
41 MHz band; Order No. 4164.400 - .420
Channel spacing 10 kHz
Control functions max. 6
Channel pulse width 1,5ms +/- 0,5 mx, incl. trim
Aerial 9,6 ... 12 V
Current drain approx. 175 mA
Dimensions approx. 190 x 195 x 85 mm
Weight approx. 870 g incl. transmitter battery
Specification R 700 micro receiver
Accessoires
Order No. Description
Aerial 4,8 ... 6 V
Current drain approx. 13 mA
Channel spacing 10 kHz
Sensitivity approx. 10 µV
Servo functions 7
Temperature range -15° ... + 55° C
Aerial length approx. 950mm
Dimensions approx. 47 x 25 x16 mm
Weight approx. 16 g
1121 Neckstrap, 20mm wide
70 Neckstrap, 30mm wide
4179.1 Trainer lead for mx-12
For use with Graupner hand-held
transmitters with DSC sockets
3290.8 Trainer lead for mx-12
For use with Graupner mc-… trans mitters with trainer sockets
Spare Parts
Order No. Description
3100.6 Antenna for mx-12
Order No. 4722 35 MHz band
Order No. 4722.B 35 MHz-B-Band
Order No. 4723 40 MHz band
Order No. 4723.41* 41 MHz band
*For export only
Description of radio control system 7
Charging the transmitter battery
Charging the transmitter battery
The rechargeable transmitter battery can be charged
via the charge socket fitted to the side of the case.
The transmitter must be switched „OFF“ for the whole
period of the charge process. Never switch on the
transmitter when it is still connected to the charger;
even a very brief interruption in the charge process
can cause the charge voltage to rise to the point where
the transmitter is immediately damaged by the excess
voltage. Alternatively the interruption may trigger a new
charge cycle, which means that the battery will possibly
be severely overcharged.
For this reason check carefully that all connectors
are secure, and making really good contact. Interruptions due to an intermittent contact, no matter
how brief, inevitably cause the charger to malfunction.
Polarity of the mx-12 charge socket
Commercially available battery charge leads produced
by other manufacturers are often made up with the opposite polarity. For this reason use genuine GRAUPNER
charge leads exclusively.
Notes on recharging transmitter batteries using an
automatic charger
· Observe the recommendations provided by the
charger manufacturer and the battery manufactu rer at all times.
· Carry out a series of test charges to ensure that
the automatic charge termination circuit works
correctly with your battery. This applies in parti cular if you are using an automatic charger desig ned for NiCd batteries to recharge the standard
NiMH battery. You may need to adjust the Delta Peak trigger voltage, if your charger provides this
option.
· The charge current must be set using the
charger’s „manual charge current select“ facility,
to ensure that the maximum charge current never
exceeds 1.5 A. Never allow the charger to set the
charge current automatically.
· Do not discharge the battery or carry out a
battery maintenance program via the integral
charge socket. The charge socket is not suitable
for this application.
· If you intend to charge the transmitter battery at
a current higher than 1.5 A, the battery must be
removed beforehand, otherwise the transmitter
could be damaged through overheating.
Automatic chargers with special NiMH charge
programs
Order-No. 6419 Ultramat 5*, **
Order-No. 6410 Ultramat 10*
Order-No. 6412 Ultramat 12*, **
Order-No. 6417 Ultramat 25*, **
Order-No. 6416 Ultra Duo Plus 30*, **
* To recharge the mx-12 system you will also need the transmitter
charge lead, Order No. 3022, and the receiver battery charge lead,
Order No. 3021.
** 12 V power source required.
Charge current
To avoid damage to the transmitter the maximum charge
current should not exceed 500 mA (0.5 A) with the charge circuit fuse out of circuit (not fitted); with the charge
circuit fuse in place: max. 1.5 A.
8 Charging the transmitter battery
Standard chargers
Order-No. 6422 Minilader 2
Order-No. 6427 Multilader 3
Order-No. 6426 Multilader 6E*
Order-No. 6428 Turbomat 6 Plus*
Order-No. 6429 Turbomat 7 Plus*
Transmitter description
Transmitter callouts
Antenna
Hovering Pitch Trim (For HELI)
Flap Trim (For AIRPLANE)
Throttle Hold SW (For HELI)
Flap Mixing SW (For AIRPLANE)
Elevator D/R SW
Trainer SW
Neck Strap
Eyelet
Hovering Throttle Trim
(for HELI)
Rocker SW
(for AIRPLANE)
Carrying Bar
Flight Mode SW
(for HELI)
Gear SW (for
HELI+AIRPLANE
Aileron D/R SW
Control stick length adjustment
To adjust the stick lenght, use the 2mm Allen wrench
(supplied with your mx-12 transmitter) to unlock the set
screw. Turn the wrench counterclockwise to loosen the
screw. Then turn the stick clockwise to shorten or counterclockwise to lenghten. After the control stick lenght
has been adjusted to suit your flying style, tighten the
2mm set screw. If you desire longer sticks, GRAUPNER
offers a stick that is approximately one inch longer than
standard. This stick, crafted from bar stock aluminum, is
available at your local GRAUPNER dealer.
SET SCREW
LOOSEN
Elevator Rudder Stick
Elevator Trim
Rudder Trim
On/Off SW
Entry Key
LCD Display
Throttle Cut SW
Throttle (Pitch)
-Aileron Stick
Throttle Trim
Aileron Trim
Entry Key
TIGHTEN
Neck strap attachment
An eyelet is provided on the face of the mx-12 transmitter that allows you to connect a Neck Strap. This hook
has been positioned so that your transmitter has the
best possible balance when you use the neck strap.
Transmitter description 9
Transmitter description
Transmitter Rear
Transmitter Crystal
Control Stick tension adjustment
Remove the battery and 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 (counterclockwise to loosen stick feel; clockwise to tighten stick
feel.) When adjusting the throttle ratched tension, make
sure that the adjusting screw does not touch the PC
board after adjustment is complete.
Charging Jack
for transmitter batteries
(Graupner 8NH-1700 TX
Order No. 3414 included)
Control Stick tension adjustment
For Throttle
For Aileron
Battery Cover
PCB
Do not touch
PCB
DSC/Trainer Jack
For Rudder
For Elevator
CAUTION
The battery connector is keyed so
that you can only be plugged in one
direction. Do not force!
Throttle Stick
The initial setting for the throttle stick is ratched type.
If you don`t like this feeling, please follow the following
instruction to change it. You will be required a posidrive
screwdriver and a pair of tweezers;
1. Remove the model from back of the transmitter, by
squeezing the lugs and pulling it out.
2. Remove the battery cover by pushing it inwards and
downwards. Remove the battery.
3. Remove 4 screws from the rear 4 corners. Remove 2
screws, 1 from either side of the rear antenna base.
4. Carefully separate the 2 halves of the transmitter,
starting at the base.
5. Unplug the 2 multi pin connectors for ease of access.
6. The left side of left stick unit has a black plastic lever
and spring, which provide the centring action - move
the stick if you are in doubt. Using the tweezers,
remove the spring.
7. Slide the lever towards the center of the transmitter
in order to remove ir from its pivot (move the stick to
clear it if necessary).
8. Reverse the above process to fit the lever and spring
to the right-hand assembly (note; the pivot is at the
top of the right-hand stick assembly).
10 Transmitter description
Direct servo control (DSC)
9. The left side of the right-hand assembly has a metal
strip which provides the ratched friction action. This
is held in place by two screws. Undo the screws and
transfer the metal strip to the left-hand assembly.
10. The mechanical conversion is now completed; check
the stick actions are as required and reassemble the
transmitter by reversing the above process, not for getting to plug in the multipin connectors.
Frequency notes
The mx-12 can transmit in either Pulse Code Modulation
(PCM) 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 dame 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 causinf interference.
For proper DSC hook-up and operation:
1. Leave the transmitter power switch in the OFF posi tion. The transmitter will not transmit any radio fre quency (RF) in this position.
2. Plug the (supplied) DSC cord 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. Turn the switch harness to the ON
position.
Note: When you install the charging jack, be sure to
hook the charging jack receptable 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 adjust ments 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.
Note: This function is for bench-checking your airplane
only.
TO BATT TERMINAL
DSC-CORD
Best.-Nr. 4178.1
V-CORD
Best.-Nr. 3936.11
BATTERY
BATTERY
SW HARNESS G
(OPTION)
Direct servo control 11
Connections and installations
For Airplane
WARNING
Do not cut or fold the antenna!
ANTENNA
BATTERY
SWITCH HARNESS
RECEIVER
R700 RECEIVER
Servo Mounting Tab
Screw
FLAP
CHANNEL
GEAR
CHANNEL
RUDDER
CHANNEL
ELEVATOR SERVO
AILERON SERVO
THROTTLE SERVO
FLAP
(AUX1)
GEAR
RUDD
ELEV
AILE
THRO
Installation requirements
It is extremely important that your radio system be correctly installed in your model. Here a few suggestions
installing your GRAUPNER equipment:
1. Wrap the receiver in protective foam rubber that
is no less than 3/8 inch thick. Secure the foam to
the receiver with #64 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 grom mets and brass eyelets to isolate them from vibrati on. 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 eyelet are
pushed from the bottom up in the rubber grommets.
When the servo screw is tightened securely, it provi des the proper security as well as the proper vibrati on 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 on the
propeller or control surfaces.
12 Connections and installations
Rubber Grommet
Brass Eyelet
Connections and installations
For Helicopter
AUX1
SWITCH HARNESS
CHARGING JACK
ANTENNA
WARNING
Do not cut or fold the antenna!
BATTERY
RECEIVER
R700 RECEIVER
GYRO
PITCH SERVO
GEAR
CHANNEL
RUDDER SERVO
ELEVATOR SERVO
AILERON SERVO
THROTTLE SERVO
GEAR
RUDD
ELEV
AILE
THRO
Connections and installations 13
Key input and display; Alarm and error display
Up Key
Down Key
Select Key
The Function keys are used to move up and down through the functions. The Select key is used to advance
the channel or function selected. The increase and
The Key displays in this case
Decrease keys are used to make changes in the
selected functions.
Increase Key
Decrease Key
Clear/Store Key
Battery 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.
Backup error display
All preprogrammed data is protected by a five-year lithium battery that guards against main transmitter battery
failure. Should de lithium battery fail, the display will
indicate BACK ERROR. If this occurs it will be necessary to replace the lithium back-up battery, contact your
local dealer. Due to the possibility of extensive damage
caused by improper removal or replacement, only your
local dealeris authorized to make this change.
Up Key
Function Keys
Down Key
Select Key
Press both keys
to enter or exit
the function mode
Press both keys
to enter or exit
the list mode
14 Key input and display, Alarm and error display
Increase Key
Decrease Key
Clear Key
Press both keys
to control the brightness
Make changes
in the selected
functions.
Input mode and function
Normal mode
Model Name
(If there is)
Model Type
: Airplane
: Helicopter
Model number
Rudder Trim Value
To Function mode
(press simultaneously)
To enter and exit the System
mode, press simultaneously
( )
then turn on the power switch
Elevator Trim Value
To List mode
(press simultaneously)
Transmitter voltage
Modulation Type
Transmitter “On Time“
Throttle Trim Value
Aileron Trim Value
Screen contrast adjustment
The screen conrast adjustment feature of the mx-12
allows the user to select the proper tint of the screen for
improved clarity and visibility in all weather conditions
and temperatures.
To increase the contrast (darken the screen), simply turn
the power switch ON and press the SEL and DATA +
keys simultaneously. To decrease the contrast (lighten
the screen), press the SEL and DATA - keys simultaneously.
Advanced Digital Trim (A.D.T.)
The mx-12 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 mx-12 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. Please also note that unlike conventional
mechanical trim levers, when the mx-12 transmitter is
in the off position, no changes can be made to the trim
values during transportation.
Model operating time
The standard display shows the total model operating
time for the selected memory.
Selecting a new model, or erasing the memory and
saving new data in it, resets the model operating time to
the value “0:00:00”.
Screen brightness control
(press simultaneously)
Input mode and function 15
Function mode
To enter the Function mode, switch the transmitter
power switch to the On position. Press the Down and
Select keys simultaneously, and the display will show
the last active program. Pressing either the Up or Down
key then scrolls through the functions one by one,
according to the Function Mode Flowchart shown below.
Once the appropriate function is displayed, changes can
be made by pressing the (+) or (-) keys. To select another channel of a particular function, press the Select
key. The Function mode is the most often used system
to input data.
Function Mode Flowchart
Information pertaining to each function is explained on
the page listed next to the function name. Functions will
appear in the same order they are shown on this chart.
Accessing the Mode Function
1. Move the power switch to the ON position.
2. Press the Down and Select keys simultaneously.
3. Use either the Up or Down to scroll through the
menu and access the applicable function.
AIRPLANE
1. Dual Rate & EXPonential
2. REVERSING SW
3. SUB TRIM
4. TRAVEL ADJust
5. ELEv Flap MIXing
6. AILe RUDd MIXing
7. THROttle CUT
8. FLAP SYSTEM
9. DIFFERENTIAL
(Only in Wing type)
10. Program MiXing 1
HELICOPTER
13. Dual Rate & EXPonential
14. REVERSING SW
15. SUB TRIM
16. TRAVEL ADJust
17. Swash Mixing
(Over 2 servos in Swashplate type
18. THROttle CUT
19. THROTTLE HOLD
20. THRO Curve
21. PITCH Curve
22. REVOlusion MiXing
16 Function mode
10. Program MiXing 2
10. Program MiXing 3
10. Program MiXing 4
11. FAIL SAFE
(Only in SPCM)
12. Servo Travel Screen
23. Program MiXing 1
23. Program MiXing 2
24. FAIL SAFE
(Only in SPCM)
25. Servo Travel Screen
System mode
To enter the System mode, press the Down and
Select keys simultaneously, then turn the power switch
to the ON position. The display will show the last active
program. Pressing either the Up or Down key then
scrolls through the functions one by one, according to
the system mode flowchart is shown to the right. Once
the appropriate function is displayed, changes can be
made by pressing the (+) or (-) keys.
System Mode Flowchart
Information pertaining to each function is explained on
the page listed next to the function name. Functions will
appear in the same order they are shown on this chart.
Accessing the System Mode
1. Press the Down and Select keys simultaneously.
2. Move the power switch to the ON (upper) position.
3. Use either the Up or Down key to scroll through
the menu and access the applicable function.
AIRPLANE HELICOPTER
26. MODEL SELect
27. MODEL NAME
28. MODEL TYPE
& Data reset
29. MODEL COPY
30. MODULATION
31. STICK MODE
26. MODEL SELect
27. MODEL NAME
28. MODEL TYPE
& Data reset
29. MODEL COPY
30. MODULATION
31. STICK MODE
32. TRAINER
33. SWITCH SELect
34. WING TYPE
32. TRAINER
33. SWITCH SELect
34. SWASH TYPE
System mode 17
List mode
To enter the Function List mode from the Function mode,
switch the transmitter power switch to the ON position.
Press the Up und Select keys simultaneously. To scroll
the functions, first press the Down and Select keys.
FUNCTION LIST 1
FUNCTION LIST 2
SYSTEM LIST 1
HELICOPTER
FUNCTION LIST 1
FUNCTION LIST 2
SYSTEM LIST 1
SYSTEM LIST 2
18 List mode
SYSTEM LIST 2
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