GRAUPNER MC-22S, Programming Manual

Page: 25 / 180

25 Using the system for the fi rst time
Note:
If you wish to use a receiver
battery and a speed controller
with integral BEC* system, the
positive (red) wire must nor-
mally be disconnected from
the 3-pin plug, although this
does vary according to the type of controller. Please
be sure to read the instructions supplied with your
speed controller before you do this.
Using a small screwdriver, carefully raise the centre
lug of the plug (1), withdraw the red wire (2) and insu-
late the exposed contact with insulating tape to pre-
vent possible short-circuits (3).
* Battery Elimination Circuit
1
2
3
red
If the receiver is ever switched on when the transmit-
ter is off, the servos may carry out uncontrolled move-
ments. You can avoid this by
switching the system on
in this order:
Always switch the transmitter on fi rst,
then the receiver.
When switching the system off :
Always switch the receiver off fi rst,
then the transmitter.
When programming the transmitter you must always
ensure that any electric motors in the system cannot
possibly start running accidentally, and that an I.C.
engine fi tted with an automatic starter cannot start
unintentionally. In the interests of safety it is always
best to disconnect the fl ight battery, or cut off the fuel
supply.
Range checking:
Before every session you should always check that
each working system is functioning correctly, and car-
ry out a range check with the model on the ground.
The transmitter aerial should be fi tted but collapsed
completely. Walk away from the model holding the
transmitter. All the functions should work smooth-
ly and correctly during this test, even at the limit of
ground-range. If your model is powered, repeat the
check with the motor running to ensure that it does
not cause interference.