Futaba 7C 2.4GHz - Manual (Page 16)

16
RADIO INSTALLATION
Follow these guidelines to properly mount the servos, receiver and battery.
• Make certain the alignment tab on the battery, switch and servo connectors is oriented correctly and “keys” into the corresponding
notch in the receiver or connectors before plugging them in. When unplugging connectors, never pull on the wires. Always pull on the
plastic connector instead.
• If any servo wires are not long enough to reach the receiver, servo extension wires (available separately) may be used.
Servo
Rubber
grommet Servo
Rubber
grommet
• Always mount the servos with the supplied rubber grommets. Do not over tighten the
screws. No part of the servo casing should contact the mounting rails, servo tray or any
other part of the airplane/helicopter structure. Otherwise, vibration will be transmitted to
the servo causing premature wear and/or servo failure.
• Note the small numbers (1, 2, 3, 4) molded into each arm on the Futaba 4-arm servo arms. The numbers indicate
how many degrees each arm is “off” from 90 degrees to correct for minute manufacturing deviations from servo to
servo.
• To center the servos, connect them to the receiver and turn on the transmitter and receiver.
Center the trims on the transmitter, then ¿nd the arm that will be perpendicular to the pushrod
when placed on the servo.
• After the servos are installed, operate each servo over its full travel and check that the pushrods and servo arms do not bind or contact
each other. Also make sure the controls do not require excess force to operate. If there is an objectionable buzzing sound coming from
a servo, there is probably too much resistance in the control. Find and correct the problem. Even if there is no servo damage, excess
battery drain will result.
• Use the mounting plate from the receiver on/off switch as a template for the cutout and screw holes. Mount the switch on the side of
the fuselage opposite the engine exhaust, and where it won’t be inadvertently turned on or off during handling or storage. Be certain the
switch moves without restriction and “snaps” from ON to OFF, and that the cutout allows full motion of the switch in both directions.
• When you install the switch harness to the helicopter, please use the switch cover. Generally sandwich the frame by switch and switch
cover and securely tighten the screws. Different models might require different installations. In that case, please follow the model
instruction manual.
Fasten about 5-10cm
from the servo outlet
so that the lead wire
is neat.
Margin in the lead wire.
• To prevent the servo lead wires from being broken by vibration during flight,
provide a margin so that the wire sticks out slightly and fasten it at suitable points.
In addition, periodically check the wire during daily maintenance.