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« on: September 23, 2020, 04:03:37 PM »
theweblover007
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Hello Everyone,
I am facing an issue since yesterday, When i turn my TX and RX on, the motor as well as servos on my plane start going off/jittering (See video)
Note that i resoldered my antenna to the receiver about a week or two back (didn't have problems before yesterday).
Problem goes off after i turn off my TX.

Please checkout the video showing this problem here : https://www.reddit.com/link/iv9jsb/video/lu71cqb0pxn51/player
Image after my soldering work : https://i.imgur.com/LHqnhb1.jpg
Rx/Tx misbehaving - Motors and servos jittering automatically without any input


Thank You
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« Reply #1 on: September 23, 2020, 07:27:17 PM »
sahilkit
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Did you take a picture before soldering and verified after rework ? no missing comments or solder bridges etc ?
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« Reply #2 on: September 24, 2020, 10:30:30 PM »
elsarc
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Is the RX is in the same condition as showing in picture. please clean it with isopropyl first, there might be an short because of flux.
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« Reply #3 on: September 25, 2020, 04:57:36 PM »
theweblover007
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Quote from: sahilkit on September 23, 2020, 07:27:17 PM
Did you take a picture before soldering and verified after rework ? no missing comments or solder bridges etc ?
Quote from: elsarc on September 24, 2020, 10:30:30 PM
Is the RX is in the same condition as showing in picture. please clean it with isopropyl first, there might be an short because of flux.

Here are the images after cleanup, still doesnt work :
https://ftforumx2.s3.amazonaws.com/2020/09/325712_625489a9a91e11b79cca764392f713ba.jpeg
Rx/Tx misbehaving - Motors and servos jittering automatically without any input

https://ftforumx2.s3.amazonaws.com/2020/09/325716_eaae1c2aed78fa5f9535c2ee1b0bb376.jpg
Rx/Tx misbehaving - Motors and servos jittering automatically without any input

https://ftforumx2.s3.amazonaws.com/2020/09/325718_458dafdf553ac55ad667b99d17795d61.jpeg
Rx/Tx misbehaving - Motors and servos jittering automatically without any input
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« Reply #4 on: September 25, 2020, 05:25:02 PM »
elsarc
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check this area with multimeter for any short
Inked325716_eaae1c2aed78fa5f9535c2ee1b0bb376_LI.jpg
Re: Rx/Tx misbehaving - Motors and servos jittering automatically without any input
* Inked325716_eaae1c2aed78fa5f9535c2ee1b0bb376_LI.jpg (78.76 KB, 800x800 - viewed 157 times.)
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« Reply #5 on: September 25, 2020, 05:36:39 PM »
theweblover007
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Quote from: elsarc on September 25, 2020, 05:25:02 PM
check this area with multimeter for any short
Nope, Not a short. Its just a reflection i guess.

Update: Now the tx and rx have completely stopped working Sad TX powers on like usual but not the RX. As soon as i plug in the esc to rx, red light turns on for a fraction of a second and goes away. I tried to add a jumper between ground and signal on the reciever and now the red led on rx starts blinking (like it should do when a bind plug is inserted). However, i am not able to bind the rx to tx anymore.
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« Reply #6 on: September 25, 2020, 05:42:13 PM »
K K Iyer
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Sorry for lack of response.
In bed with fever since Tuesday. Sample given. Result on Monday.
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« Reply #7 on: September 25, 2020, 05:43:46 PM »
theweblover007
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Quote from: K K Iyer on September 25, 2020, 05:42:13 PM
Sorry for lack of response.
In bed with fever since Tuesday. Sample given. Result on Monday.

Damn sir, didn't know. Sorry for disturbing.
Please take care and get well soon!
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« Reply #8 on: September 25, 2020, 06:09:50 PM »
elsarc
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Do not shot pins. check the rx getting proper voltage. make sure 3.3 volt regulator functioning properly. you may lose rx while shorting pins
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