MFD autopilot problem

[ThunderstruK]

Hi chaps, I'm hoping someone can help me here. I recently got a used mfd autopilot. I decided to test that everything was working ok, so I plugged in the power (via 3s) in the top left pins. I then checked the voltages from the camera and vtx pins, however in doing so I slipped and let the two test rid things from the multimeter touch, which resulted in a spark 😞  now I'm not getting any voltage from those pins, however the GPS etc are all powered fine.

I have opened the case and looked at the back of the pins and have seen that one of the white boxes which surrounds the pins is not complete (see image)  under the magnifying glass it looks like it is made of wire (my knowledge of circuit boards is very limited)  so I think I may have burned it out.

Now, my question is, can this be fixed?! Or have I destroyed it!

Thanks in advance!

[Coyote]

I can't see in the picture ( might be my small phone screen ) but if you shorted out the 12v then yes it's fixable

[ThunderstruK]

Yeah I dont think think the picture is great to be honest, but it was the best I could get from the awkward angle.

Basically, the thin while line which forms a box around many of the pins has a 1-2 mm gap in it now :(

If it were that I shorted it out, how would I go about fixing it?

[ThunderstruK]

Heres possibly a better picture, with the area of interest circled in red

[Coyote]

"If" that was a previous join which I believe it was it's a case of joining the two pins again replacing the burnt out track.

[ThunderstruK]

Awesome, that's potentially good news! thank you!

Which pins would I need to connect up? Im not really sure what that white track represents (?ground). If so, would I solder a little wire from the ground of the power input to the ground on the next round along (I think that's the camera pins), or would I need several wires which also go to the vtx ground?

Sorry bout all the questions! I have a glimmer of hope after I thought I'd just destroyed it!

[Coyote]

I can't say for definite being still on my phone. But from what I can see, the white line that is broken ( the line is for illustrations only ) underneath where that was was the track, you can see the burn underneath it.

So the two pins bang in the middle of your red circle need joining. I will upload a pic when I get in if no one beats me to it. 

From memory they would be the 12v pins of the Vtx and camera connections

[ThunderstruK]

Brilliant, thanks. If you could upload a pic, or just draw on my pic showing where the wire should go, that would be really helpful when you have a chance, because i'm not sure if you mean to just have a wire between the two pins, or if i need connect each of those two to the ground of the power input pins.

According to the manual, I think those two pins are both the ground pin for the camera and VTX, with the 12v pins the next ones along, where the white track is still visible. 

[Coyote]

There is no white track, as I said the white lines are just that, lines on a PCB, nothing more.

I will upload it when I get back in

[ThunderstruK]

That would be great, thanks! Looks like i'll have some soldering fun tomorrow!

[Coyote]

Follow the instructions I put under the picture

[ThunderstruK]

Thanks mate, I'll give that a go this evening after work. How do I check the continuity between the pins? I only have the basic multi-meter from hobbyking so I don't know if its capable of doing it!

[Billy_boy_2010]

Thanks mate, I'll give that a go this evening after work. How do I check the continuity between the pins? I only have the basic multi-meter from hobbyking so I don't know if its capable of doing it!

set the multimeter to measure resistance.

Infinite resistance means the pins aren't connected. No resistance means they are cconnected.

[ThunderstruK]

I tried that and pins 1 and 3 appear to have 0 resistance if I've measured it correctly, however I still get no voltage through the cam or tx pins 😞

[Coyote]

Pm'd