4
INPUT POWER
Four 1.2V “AA” NiMH cells are included. NiCd or 1.5V alkaline batteries can also be used. Do not mix cell
types, or old and new cells, etc. Slide open the battery door to fi nd the battery holder. Insert all cells with
the proper polarity as shown inside the battery holder. Carefully tuck the wires and battery holder inside
the battery compartment so not to damage them when closing the battery door.
Battery voltage is shown on the LCD’s home screen for easy monitoring. A “LOW BATTERY” warning will
show when battery power drops to the voltage value shown in the BATTERY ALARM screen as described
on page 8.
WARNING!
Never operate an R/C model with weak Tx batteries! Reduced operational
range and/or possible loss of control of the aircraft could result. Replace weak alkaline
batteries, or re-charge NiCd or NiMH batteries, before attempting a fl ight!
A “Tx Battery” timer in the TIMER menu described on page 16 can track the total amount of time the
transmitter has been operational.
See the ACCESSORIES section on page 26 for optional batteries and chargers available at local hobby
retailers.
CHARGE JACK AND CHARGING RECHARGEABLE BATTERIES
The charge jack should
only
be used for rechargeable batteries. Do not try to
recharge alkaline batteries. Charge adapters for Futaba
®
brand transmitters are
compatible, with the center pin being positive polarity. The Tx power switch must
be in the OFF position to recharge batteries. Do not charge batteries at greater
than 1 amp. Cycling of the Tx batteries can be accomplished through this jack.
Misuse, improper charging, or over-charging of rechargeable cells can result in damage to the cells that
could include cell rupture, explosion, or fi re!!
WARNING!
Do not accidentally short circuit the terminals inside the charge jack, as
this can cause permanent damage to the radio’s charge circuitry and battery and void
the warranty.
POWER LED
The blue LED illuminates when the power switch is turned on and ample voltage is supplied by the battery.
This LED will fl ash if battery voltage drops to the voltage set in the BATTERY ALARM setting described
on page 8.
All channels are fully proportional, depending if controlled by a switch or mixed to another proportional
channel. Channels 5-8 can be controlled by a non-proportional switch or proportional side lever. However,
if a proportional channel (1-4) is mixed
to
channel 5-8 these channels can provide proportional control.
Aircraft control is accomplished through various devices by the
pilot
(sticks, switches, etc.), and other control
inputs can be manipulated
electronically
by the Tx to alter the control signals before they are delivered to the
receiver (mixes, exponential, etc.). Some electronic functions can be turned on/off by the pilot during fl ight
such as a timer. Other functions can only be altered while the model is on the ground, such as changing
travel limits or reversing for a particular channel.
TTX850 POWER SYSTEM
TTX850 Charge Jack
FLIGHT CONTROLS
