Hi Guys,

 

As you can see on the picture, one component has burnt on the tx (at the bottom near ts330 writing). However I can always transmit the signal with the sound, but no image. And when the tx is on, the TV screen is going black without frying. I mean there is no BSOD.

Do you think guys, it's possible to fix it? If you have an idea I'm interested.

 

Thanks

Alex

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I'm so happy to have stumbled upon this. Is this the Hobbyking 5.8ghz? If so this happened to me while I was trying to hook up a non board camera. The resistor turned red and was fried. I noticed the same thing as you and thought that it was weird.

Earlier I had issues with the included wire harness and found that it was because they had mixed up the hot(5v) and signed leads. I was confused and hooked the camera to a tv directly it did not work so I reversed these leads and it did. The point of that was that I had a solid signal but with no video (just black screen). I assumed that it had something to do with a non functioning board camera. I took out the multimeter and was reading 3-4v coming out of the video transmitter and immediately thought that could be the problem. I had to cut the hot wire from the transmitter and hook it up to a 12v supply. Remember that the black(ground) wire must be connected to the 12v source as well as to the transmitter. And the whole system started working together properly.

Anyway to recap disconnect the hot (5v) wire that goes from transmitter to camera from the video transmitter and hook it up to a power supply suitable for the board cam. Splice the ground wire so that one arm goes to the transmitter with the video signal and the other goes to the negative terminal on the battery. If I were you I would check the power coming out of the transmitter. If you are lucky this will fix it. Not quite as clean as the included wire harness but much cheaper than a new transmitter

Good luck, hope it works
Eric

Do you mean that to make it work properly it will need 2 power supplies ? TX in and CAM?

Or i can just make a new wire betwteen the cam and the tx signal ?

I just used 1 battery except modified the wire harness to reattach the hot wire from the transmitter to the main pack. I have attached a photo of what I did.

I hope it works

Attachments:

Thx for the schema. I've tried it today, it seems that i have something (white rolls on the blackscreen) but no images. Maybe it's my camera that can't support 12v mmm

exactly same component fried to me.. It was working normally and imaging started to roll like you said.... Its sad! Did you manage to fix it?

Eric. Same thing happened to me. That resistor burned from nothing... My TX is the same and it is not from HK. Its the same one as showed in the picture. Just measure the hot output to camera and its showing less than 3-4v as yours.

I really understand what you did and I will try that solution too. Very cleaver, I liked.

But one thing must be said. The Voltage Out to power up the camera is not 5v, but same as the input. So if you are using a 3s on power supply the TX that video output should be around 12v. There is no 5v out put in this tx. That`s why a 12v camera is needed to use with this TX.

About the burned component. I have no clue why it fried. I was using it normally for over 20minutes when the roll over image showed up. And then I saw the cover burned and that component toasted...  

:(

Hello, 

I just had the same problem, I wonder if anybody has found the the resistor number of if is possible to fix it.

DavidUpload Files

It will be difficult to guess unless some one with similar model looks ( without toasted resistor) looks at it with mag lens or measures it and tells us. Mine is cased and sealed and definitely not the same :(

This picture is from a 2.4 tx. Can't really see anything...

Its very sad because it burned the very first time I turned it on, when I was doing the set up for my first fpv. it's been a very expensive learning experience :(

go to the HAM members page and ask them .... they are on the HAM page

http://diydrones.com/group/ham-drone-builders

Wilfred

I have the same thing on my HK 5.8 400mW Tx. Mine occured when I briefly connected two pins with a multimeter probe. My video still works however I get the rolling pattern overlaying the video. I am not convinced this is a resistor as I noted there were two other identical looking smds on the board (also adjacent to the SS14 chip) that did not register a resistance when measured. I suspect they are capacitors but do not have a suitable meter to test. It would be very generous of someone with the same transmitter to measure the chip so that we could replace it!

In the mean time my tx is still usable...

hello

sorry for my bad englishi'm french

i repared it with a friends,

the composant is just a "fusible", not a resistor or condensator

so we just add a piece of electric cable and now it work !!!! :o)

i'm very happy

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