15
4-in-1 Control Unit Description, Arming and Motor Control Test
The unique 4-in-1 Control Unit installed on your Blade™ CX is a lightweight combination of 4-channel FM receiver,
main motor mixer, main motor electronic speed controls, and piezo gyro. The 4-in-1 unit also contains a main
motor proportional mix trimmer pot and status LED.
The following checklist contains the steps you must follow to ensure proper arming and operation of the 4-in-1 unit
as well as proper motor control response:
• Each time before you fly you must ALWAYS turn on the transmitter power first before connecting
the flight battery to the 4-in-1 unit. Never connect the flight battery to the 4-in-1 unit before first
powering on the transmitter. Never turn off the transmitter before disconnecting the flight battery
from the 4-in-1 unit first. Also, be certain to fully extend the transmitter antenna before flight.
• Both the throttle (left-hand) stick and throttle trim MUST be in their lowest possible position in order
for the 4-in-1 unit to arm the electronic speed controls for the main motors (see photo found on page
16 for reference).
• If this is the first test flight, or a test flight following repairs, you will also want to center the rudder, aileron and
elevator trims (
see photo found on page 16 for reference).
Motor Plugs
Status
LED
Servo Plugs
Receiver
Crystal
Main Motor Proportional
Mix Trimmer Pot
Antenna Wire
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