JJRC H12C Frequency Adjustment does not work.

[Okeanos]

Good Morning members,

I have the JJRC H12C quadcopter and last day I lost the frequency connectivity between quadcopter and remote controller. Ι can not moderate. I followed the manual's procedure but without any result. The lights on quadcopter are flashing very fast with high frequency. One month ago I changed all the rotors after a crash, but the copter worked for a while. Not now. I don't understand why

Do you have any proposal? What spare part I need to order?

Thank you in advance.

 

[Jackson]

Well one thing that comes to mind is the RX antenna that's inside the quad. They are a flimsy, insulated, short piece of wire, usually white. Maybe it got dislodged (broken off). You'll have to open the quad and take a look.

Something like this:

Or this.

 

[Okeanos]

Thank you very much for your advice. Iwill check the antenna.