Quad Transmitting issue

[Krivera]

Hi I am new to the hobby and have recently build my first quad.

I am using a kk2 mini as my fc and I am using a fs t6 controller. After powering it up one day a bit of smoke started coming from my cheap pdb so I quickly shut it down. The battery cables had burnt off and the bottom of the fc was a little blackened but it seemed to still work fine. I ordered a new pdb and also a better antenna to improve the range of my transmitter. Once they came in I installed the pdb and soldered in the new antenna just like the mod video for the fs t6 explains.

Here is my issue.
The fc shows that 3 channels have no signal and the other three are all over the place and constantly changing. I tried reattaching the old antenna, and even bought another receiver but I've had no luck.

I don't know if the fc could be fried or something is wrong with the tx. I really want to avoid buying another transmitter. However, I noticed that on the main board of the fs t6 there seems to be a missing resistor R8. Not sure how that could have happened, or if it was even there before, as it was working perfectly fine before.

Any ideas are greatly appreciated

 

[Admiral]

Hi Krivera, welcome to the forum, I have found, if in doubt chuck it out.
A new KK2 board is not as expensive as a new Tx, so replace it and see if that fixes the issue if it does you know it was the KK2, if not you have a spare KK2 for your next build and then look at your Tx.

 

[Stambo]

I would first want to know what caused the problem. Do you know?

 

[Krivera]

I do have a cc3d fc laying around so I will give that one a shot. Thanks

- - - Updated - - -

I think what caused the issue with the smoke was a combination of my inexperience with soldering and the positive and negative pads on the distribution board being very close to each other.