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.

4Safety notes

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.

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.

6Introduction

•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 servos 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 provides 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 variable 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

•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 programming 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 transmitter 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)

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

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
			1121		Neckstrap, 20mm wide
Current drain approx.	13 mA		70		Neckstrap, 30mm wide
Channel spacing	10 kHz		4179.1		Trainer lead for mx-12
					For use with Graupner hand-held
Sensitivity approx.	10 µV
					transmitters with DSC sockets
Servo functions	7
			3290.8		Trainer lead for mx-12
Temperature range	-15° ... + 55° C				For use with Graupner mc-… trans-
					mitters with trainer sockets
Aerial length approx.	950mm			Spare Parts
Dimensions approx.	47 x 25 x16 mm
				Order No.	Description
Weight approx.	16 g		3100.6		Antenna for mx-12

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.

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.

Notes on recharging transmitter batteries using an automatic charger

·Observe the recommendations provided by the charger manufacturer and the battery manufacturer 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 particular if you are using an automatic charger designed for NiCd batteries to recharge the standard NiMH battery. You may need to adjust the DeltaPeak 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.

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*

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.

8Charging the transmitter battery

	Transmitter description
	Transmitter callouts
	Antenna
	Hovering Pitch Trim (For HELI)	Neck Strap	Hovering Throttle Trim
	Flap Trim (For AIRPLANE)
		Eyelet
			(for HELI)
	Throttle Hold SW (For HELI)
			Rocker SW
	Flap Mixing SW (For AIRPLANE)		(for AIRPLANE)
			Carrying Bar
	Elevator D/R SW		Flight Mode SW
			(for HELI)
	Trainer SW		Gear SW (for
			HELI+AIRPLANE
			Aileron D/R SW
	Elevator Rudder Stick		Throttle Cut SW
	Elevator Trim
			Throttle (Pitch)
	Rudder Trim		-Aileron Stick
	On/Off SW		Throttle Trim
	Entry Key		Aileron Trim
			Entry Key
	LCD Display

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

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

DSC/Trainer Jack

Charging Jack
for transmitter batteries
(Graupner 8NH-1700 TX
Order No. 3414 included)	Battery Cover
Control Stick tension adjustment

For Throttle	For Rudder
PCB
For Aileron	For Elevator
Do not touch	CAUTION
PCB	The battery connector is keyed so
	that you can only be plugged in one
	direction. Do not force!

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.

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 forgetting 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 position. The transmitter will not transmit any radio frequency (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 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.

Note: This function is for bench-checking your airplane only.

TO BATT TERMINAL

	V-CORD
	Best.-Nr. 3936.11	SW HARNESS G
		(OPTION)
	BATTERY
DSC-CORD	BATTERY
Best.-Nr. 4178.1

Direct servo control

11

Connections and installations

For Airplane

BATTERY

SWITCH HARNESS

WARNING

Do not cut or fold the antenna!

ANTENNA

RECEIVER

R700 RECEIVER

FLAP	FLAP
CHANNEL	(AUX1)

GEAR GEAR CHANNEL

RUDDER

CHANNEL RUDD

ELEV

ELEVATOR SERVO

AILE

AILERON SERVO

THRO

THROTTLE SERVO

Servo Mounting Tab

Screw

Rubber Grommet

Brass Eyelet

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 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 eyelet 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 on the propeller or control surfaces.

12 Connections and installations

Connections and installations

For Helicopter

	AUX1
BATTERY	PITCH SERVO

GYRO

GEAR GEAR

CHANNEL

			RUDD
			RUDDER SERVO
		SWITCH HARNESS	ELEV
	CHARGING JACK		ELEVATOR SERVO
		RECEIVER	AILE
	ANTENNA		AILERON SERVO
		R700 RECEIVER	THRO
	WARNING		THROTTLE SERVO

Do not cut or fold the antenna!

Connections and installations

13

Key input and display; Alarm and error display

Up Key	Increase Key
Down Key	Decrease Key
Select Key	Clear/Store Key
The Function keys are used to move up and down th-	Decrease keys are used to make changes in the
rough the functions. The Select key is used to advance	selected functions.
the channel or function selected. The increase and

The Key displays in this case

Up Key

Increase Key

Function Keys

Decrease Key

Make changes

Down Key

Select Key

Clear Key

in the selected

functions.

Press both keys

Press both keys

to enter or exit

to control the brightness

the function mode

Press

both keys

to enter or exit

the list mode

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.

14 Key input and display, Alarm and error display

Input mode and function

Normal mode

	Model Name			Transmitter voltage
	(If there is)
Model Type
: Airplane							Modulation Type
: Helicopter
Model number							Transmitter “On Time“
	Rudder		Trim Value
					Throttle		Trim Value
Elevator Trim Value				Aileron Trim Value

						Screen contrast adjustment
					To List mode	The screen conrast adjustment feature of the mx-12
						allows the user to select the proper tint of the screen for
					(press simultaneously)
						improved clarity and visibility in all weather conditions
						and temperatures.
	To Function mode
						To increase the contrast (darken the screen), simply turn
	(press simultaneously)					the power switch ON and press the SEL and DATA +
	To enter and exit the System					keys simultaneously. To decrease the contrast (lighten
	(thenmode,turnpresson thesimultaneouslypower switch)					the screen), press the SEL and DATA - keys simultane-
						ously.

Screen brightness control (press 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”.

Input mode and function

15

Function mode

To enter the Function mode, switch the transmitter			AIRPLANE				HELICOPTER
power switch to the On position. Press the Down and
Select keys simultaneously, and the display will show				1.	Dual Rate & EXPonential
the last active program. Pressing either the Up or Down
key then scrolls through the functions one by one,				2.	REVERSING SW
according to the Function Mode Flowchart shown below.
Once the appropriate function is displayed, changes can				3.	SUB TRIM
be made by pressing the (+) or (-) keys. To select ano-
ther channel of a particular function, press the Select				4.	TRAVEL ADJust
key. The Function mode is the most often used system
to input data.
Function Mode Flowchart				5.	ELEv Flap MIXing
Information pertaining to each function is explained on				6.	AILe RUDd MIXing
the page listed next to the function name. Functions will
appear in the same order they are shown on this chart.				7.	THROttle CUT
Accessing the Mode Function				8.	FLAP SYSTEM
1. Move the power switch to the ON position.
2. Press the Down and Select keys simultaneously.				9.	DIFFERENTIAL
3. Use either the Up or Down to scroll through the
				(Only in Wing type)
	menu and access the applicable function.
				10. Program MiXing 1
				10. Program MiXing 2
				10. Program MiXing 3
				10. Program MiXing 4
				11. FAIL SAFE
				(Only in SPCM)
				12. Servo Travel Screen
16	Function mode

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

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		AIRPLANE
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.

		HELICOPTER
26.	MODEL SELect	26.		MODEL SELect
27.	MODEL NAME	27.		MODEL NAME
28.
	MODEL TYPE	28.		MODEL TYPE
& Data reset			& Data reset
29. MODEL COPY		29.		MODEL COPY
30. MODULATION			30. MODULATION
31. STICK MODE		31.		STICK MODE
32.
	TRAINER	32.		TRAINER
33. SWITCH SELect		33.		SWITCH SELect
34.	WING TYPE
		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

SYSTEM LIST 2

HELICOPTER

FUNCTION LIST 1

FUNCTION LIST 2

SYSTEM LIST 1

SYSTEM LIST 2

18 List mode