FUTABA Magnum Sport FP-2P - RECEIVER FP-R102 GR AND SERVO FP-S148; BEC System Explanation; Connection Diagram; Power Supply Options

The BEC) mark is displayed on the front of the receiver of BEC (Battery
Eliminator Circuitry) system sets with a receiver with shared power supply
regulator.
RECEIVER FP-R102GR AND SERVO FP-S148
a
Fig. 9
RADIO CONIRGO: >TStta
2 CHANNEL RECEIVER
Antenna wire
Red common 2P
connector (male pins)
Connect the servo and switch as
shown in the figure and extend
the transmitter and receiver ante-
nna fully.
(3) When motor car uses an ordi-
nary common power supply
chassis
Red common 2P
connector
FrN
(Female pins)
Buy the red common 2P
connector from the kit
manufacturer and connect to
the controller.
Pin 1: Minus
Pin 2: Plus
{— Na Receiver crystal
a a a a a a an a Rg S a eas
Red common 2P
connector
Connection to this connector
(1) When chassis power supply of
engine or motor car is separate
Wrapped with
“__\rubber bands.
(2) When motor car uses a speci-
al BEC system chassis (com-
mon power supply specifi-
cations)
Red common 2P
connector
Ga Controller
- 0 £90 Ses,
no
-n
Orb
O}
(Female pins) i O Yo
H K © i i
H ` f Fat
Connect to the red common ————————__ Snnnnnene LO gua"
2P connector of the control-
ler.
The Futaba BEC (Battery Eliminator. Circuitry) system can also use a common power supply with the conventional four penlight
batteries system (separate power supply).
eA
common
power
supply
regulator
and
diode
may
also
be
supplied
with
the
speed
controller,
depending
on
the
vehicle
kit.
Since they cause a voltage drop, always remove them.
e Set the transmitter power switch to ON, then set the receiver power
switch to ON. The servos stop near the neutral position. Operate the
transmitter sticks and check if each servo faithfully follows operation
of the sticks.
e Connect the pushrod to each servo horn, then check if the direction
of travel of each servo matches the transmitter operation.
è Operate each servo over its full travel and check if the pushrod binds
or is too loose. Applying unreasonable force to the servo horn will
adversely affect the servo and quickly drain the battery. Be especially
careful when using 8.4V. .
e Always make the full stroke (including trim) of the servo horns some-
what larger than the full travel. Adjust the servo horns so that they
move smoothly even when the trim lever and stick are operated simul-
taneously in the same. direction.
e Be alert for noise.
Always solder a noise killing capacitor to the running motor. If metal
parts touch each other due to vibration, noise will be generated and
cause the receiver servos to operate erroneously. We recommend the
use of noiseless parts.
e Even though the receiver antenna wire is long, do not cut or bundle it.
The range of the radiowaves.will be shortened.