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Follow the steps below to update the
firmware of the transmitter：
1.
Download the latest version firmware at
PC side.
2.
Use USB cable to connect the
transmitter and the receiver, then select
"USB Storage(SD)".
3.
Copy the firmware downloaded to
FIRMWARE folder of "SD-HC Card".
4.
Upplug the USB cable, then turn off the
transmitter.
5.
According to the directions as shown,
push both TRIM buttons at the same
time while pressing the both Power
Switches for 2S, then release them, at
the time, the transmitter screen lights
up. The transmitter enters firmware
updating state, as shown in Pic 1.
6.
Press R TRIM button to access the
"FIRMWARE" folder, then push upwards
or downwards to select the firmware
you desired,as shown in Pic 2.
7.
Press and hold the R TRIM button for a
while to start the update. The progress
bar will appear on the sreen, as shown
in Pic 3.
8.
Press L TRIM button to return after the
progress has been finished, as shown in
Pic4. Push R TRIM button downwards to
select "Exit", then exit the update state
by pressing R TRIM button
5.9 Upgrading Transmitter Firmware
Pic 1
Pic 3
Pic 2
Pic 4
