Flex ECO 6S/X MRX Instruction Manual
August 2017 v1.0
Page 14 of 34
4. Function Settings
4.1 Transmitter
4.1.1 Transmitter Firmware Version
1) Press down the STOP button (transmitter power off).
2) Press and hold PB1 and PB3 at the same time.
3) Reset the STOP button by rotating it clockwise or counter
clockwise, it will pop up (transmitter power on).
4) Let go PB1 and PB3 at the same time. The Status LED
displays firmware version with red, green and orange blinks.
5) Exit Firmware Version mode by pressing down the STOP
button (transmitter power off).
4.1.2 Transmitter Channel Settings
1) Press down the STOP button (transmitter power off).
2) Press and hold PB1 and PB2 at the same time.
3) Reset the STOP button by rotating it clockwise or counter
clockwise, it will pop up (transmitter power on).
4) Let go PB1 and PB2 at the same time. The Status LED
displays current channel setting with red and green blinks. A
green blink represents the tens (+10) and a red blink
represents the units (+1). For example, 1 green blink followed by 5 red blinks is
channel 15. LED-A also lights up during channel setting mode.
5) Change transmitter channel by pressing PB1 to increment the units (+1) and PB2 to
increment the tens (+10). For example, press PB2 two times and then PB1 four times
is channel 24 (Status LED blinks 2 greens and 4 reds). Make sure the newly selected
channel is shown on the Status LED before proceeding to the next step below.
6) Transfer the newly selected channel to the receiver by press and hold the START
button until the Status LED turns to constant green (transfer complete). Press
down the STOP button if constant green is not shown on the Status LED after more
than 10 seconds (transfer incomplete); the transmitter will revert back to its
previous channel setting. Make sure the receiver power is turned on and within the
operating distance during the entire process. Skip step 6 if changing receiver
channel is not required.
7) Exit Channel Setting mode by pressing down the STOP button (transmitter power off).
Note: When selecting a new channel, make sure each button press does not exceed 3 seconds.
Important Note:
Step 6 illustrated above is strictly required if you are intending to change the entire system
channel (both transmitter and receiver). The entire system no longer works if step 6 is skipped
because the transmitter and receiver channels are now different (new vs. old). In this case you
would have to redo step 1~4 and step 6 to transfer the newly selected transmitter channel to
the receiver.
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