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XF631 MANUAL • CHAPTER 1: Transmitter Controls
To adjust the control stick length, use a 2 mm Allen
wrench to unlock the set screw located inside the
end of the control stick. Turn the set screw counter-
clockwise to loosen it, then turn the knurled portion
of the stick to adjust the length. Counterclockwise
will lengthen the stick and clockwise will shorten it.
After the control stick(s) has been adjusted to suit
your flying style, tighten the set screw.
CONTROL STICK LENGTH ADJUSTMENT1.4
CHAPTER 1: Transmitter Controls continued
TRANSMITTER REAR1.3
Note: Your transmitter has a 5-year lithium battery
to protect your preprogrammed data against main
transmitter battery failure. If your system reads 0.0V
or has an unfamiliar display (service mode), or your
data resets to the factory defaults, return your
transmitter to Horizon Service Center (see page 28)
for a lithium battery replacement.
BATTERY CONNECTOR
Use caution when disconnecting/removing the
transmitter battery pack. If the connector is not
properly disconnected, damage to the connector
and/or the radio system can result.
CRYSTAL
(Factory installed)