Graupner MX-20 Failsafe problem - RC Groups
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Apr 12, 2012, 04:51 AM
Smoke on , go !
zaguruinzasky's Avatar

Graupner MX-20 Failsafe problem

Guys I have a problem withthe mx-20

I'm using it for a mikrokopter, my receiver is the GR-32 (4 antennas), and the connection to the mikrokopter is via SUM channel (single cable).

I set the failsafe as described in the manual, selecting POS (position) for all channels, then I press SET and I get the message "Position Stored". But nothing happens if I turn off the radio. What is the problem ?

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Apr 09, 2014, 06:05 PM
Registered User
I think you have the newest firmware in gr-32 which doesn't work with mirkokopter failsafe properly. I have the same problem. In others receivers I downgraded the firmware in gr-32 I can't do that I don't know why
May 16, 2014, 10:17 PM
glmccready's Avatar

A new message in an old thread!

I just bought two new GR-24L, and updated the Firmware, to 3.78 from 3.76. Neither of these work with Mikrokopter. When I shut off the Tx the MK still shows full transmitter strength!
I have an oler Gr-24L with 3.75 which works fine. Now if Ican just figure out how to load the old firmware? Update Assistant won't me.
May 19, 2014, 05:07 AM
glmccready's Avatar
Mikrokopter repsonds:
Graupner did change the FailSafe function in the receivers. If you use the latest Software on your receiver you have to go into the Menue "Setting & Data view".
There go to the window "RX Fail Safe Vx.xx" and change the "MODE" of channel 1 to "OFF". Now the copter will again receive the lost signal.

Mit freundlichen Grüßen / Best regards

Lothar Freudenberg

HiSystems GmbH
Last edited by glmccready; May 19, 2014 at 10:17 AM.
Mar 31, 2015, 04:29 PM
Registered User
That will not repair the failsafe fully. When you will first switch on the receiver (before transmitter failsafe wont work
Apr 11, 2015, 04:43 AM
Registered User
Originally Posted by Mironb
That will not repair the failsafe fully. When you will first switch on the receiver (before transmitter failsafe wont work
I have 3.78 and it doesn't work at all. Even if I switch on transmitter first.

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