Devo 7 (FCC) suddenly losing control range

Discussion in 'Walkera Devention Radios' started by iskandar, Jan 8, 2017.

  1. iskandar
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    iskandar Active Member

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    Hi,

    I forgot to switch off my Devo 7 (FCC, firmware is v0.5a) at one night and now it is losing control range. Previously, I can go as far as 400/500 meters without issue. Now, I can only go as far as 100 meters (or maybe less) and the quad is sending Lost Control notification at the OSD and drop down without any chance of regaining control again.

    My Devo 7 is toast? Possible to repair? Buy a new radio?

    Please advise. Thank you.
     
    Last edited: Jan 8, 2017
  2. bjr981s
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    bjr981s Moderator Staff Member

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    What is the battery in the Devo 7?
     
  3. iskandar
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    iskandar Active Member

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    Panasonic Eneloop 1,900mAh rechargeable Ni-MH AA batteries. Using the same batteries but different result now. Batteries has around than 20/30 cycles only, bought it new.
     
    Last edited: Jan 8, 2017
  4. bjr981s
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    bjr981s Moderator Staff Member

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    If it was a lipo it would now be toast. I don't know about these batteries but most likely one has died.

    Try using a set of AAs.

    Cheers
     
  5. iskandar
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    iskandar Active Member

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    No possibility of faulty transmitter hence lower control range?
     
  6. bjr981s
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    bjr981s Moderator Staff Member

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    Very unlikely. It is possible that you have damaged the 3.3 volt voltage regulator to the CYRF6936
     
  7. iskandar
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    iskandar Active Member

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    How to check or replace? Any idea? Arghh, too bad.
     
  8. bjr981s
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    Change the batteries to AAs and see if the problem goes away. My guess is that one of your batteries has gone HR. High Resistance.
     
  9. iskandar
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    iskandar Active Member

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    I will... thank you!
     

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