Radio Calibration Problem Turnigy 9X

First of all I have to say that I'm completely new to the RC world.

Today I just finish assembling an quadcopter kit from jDrones. I loaded the latest firmware onto the APM 1 and everything seems to be working fine, but when I try to setup for the first time in the Radio Calibration page, when I move the sticks on my turnigy 9x, nothing happen. I saw that the bars on the wiki page ( what it is suppose to be) is green, but on mine, it's blue. I'm not quite sure what I'm missing here because I've never done this before, but I think I've followed the instruction correctly.

Is there anything extra that I'm suppose to do to make the Turnigy 9X (stock) work with APM1?

Some extra observations:

  • I think I have paired the tx with rx correctly since the red light on the rx is solid and only turns on when I turn my radio tx on.
  • The blue CPPM LED light on the red APM 1 board flash rapidly at first, but when I start moving the throttle on the turnigy 9x, the led starts to flash slower depending on I far I push the throttle. If I push it all the way up, the led flash very slowly, but if I push it all the way down, the led flash faster.
  • The green and red light on the IMU/Oil Pan board flash - Assume that this has nothing to do with rx/tx

Does anybody have an idea about what I could possibly miss or what newbies often miss?

Let me know if you need more information.

Tags: 9x, Calibration, Radio, apm1, turnigy

Views: 1900

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Replies to This Discussion

Permalink Reply by harin sanghirun on July 23, 2012 at 10:17pm

This is what I got when I tried to calibrate the radio in the first time setup. The APM doesn't seem to get any signal from the rx. However, when I connect the esc directly to the rx, they all work (motor spins), but ch5-6 is not controllable by the tx.


JDronesPermalink Reply by Jani Hirvinen on July 23, 2012 at 11:20pm

Harin, can you please check if you have small jumper soldered on bottom of the CPU board. There is an small 3 pad solder jumper that needs to be soldered on correct position (name I/O PPM). If that is not soldered. Make a small solder blob between center and PPM side.

If you are missing it, looks like our engineer forget to solder that for you. After that you should have proper signaling coming to Mission Planner

Permalink Reply by harin sanghirun on July 23, 2012 at 11:53pm

Hi, Jani!

I found the 3 pad solder jumper and it was not solder! I will probably solder it this evening and come back to update if it works yet. Thanks.

ps. your engineer probably forgot to solder the SJ1 jumper also. At first the battery won't power up the APM but USB will. Luckily I found that out in the troubleshoot section in the wiki!


JDronesPermalink Reply by Jani Hirvinen on July 24, 2012 at 12:08am

ok good to know, i will remind them to check that more carefully as both of them should be soldered as default.

Yes if you are missing that I/O solder. You will not get any input to MP so that was your problem.

Permalink Reply by harin sanghirun on July 24, 2012 at 3:04am

Problem Solved!

Maybe someone should add this to the troubleshooting guide to prevent unlucky newbies like me from being throw off balance!


JDronesPermalink Reply by Jani Hirvinen on July 24, 2012 at 9:59am

yes we will add it to wiki too

Permalink Reply by Igor Bastrikov on January 4, 2013 at 3:28pm

Harin, maybe you could answer... Where do I find this jumper and how do i solder it? Thanks. I have the same problem.

Permalink Reply by Igor Bastrikov on December 29, 2012 at 6:01pm

Please explain me where to find this jumper, because i'm having the same problem. Maybe a photo? Thank you.

Permalink Reply by harin sanghirun on January 4, 2013 at 8:15pm
I'm on vacation right, I'll check it out for you when I got home
Permalink Reply by Tom Evans on July 24, 2012 at 4:29pm

In my limited experience I've noticed that as I increase throttle the blue led flashes faster.  It's possible you will need to "reverse" the throttle control in the 9X.  APM will not arm at any throttle setting other than low/off. Also rudder/yaw channel must be set to full 100% range (i.e. you can not be in a lower dual rate rudder setting) when attempting to arm the apm.


JDronesPermalink Reply by Jani Hirvinen on July 25, 2012 at 2:40am

Tom, flashing behavior really depends on the software version that is inside PPM encoder. On Harin's case there were missing jumper between PPM encoder and main processor. On custom jDrones electronics there is extra jumper to handle PPM sumcodes. This is for people who want to connect their receiver directly to main processor. 

Permalink Reply by Primož Kralj on May 12, 2013 at 11:30am

Hello, di you solve this problem? I am having the same.

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