Anyone have pinout for a cobra 29 LX BT inside the radio?

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great white
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Anyone have pinout for a cobra 29 LX BT inside the radio?

#375933

Post by great white »

I've got a Cobra 29 LX BT.

The BT crapped out a while ago so it's been sitting on my bench while my older 29 LTD Nw WX Bt has been riding in the truck.

After getting serious run around from cobra about getting a new BT board (well out of warranty, have to purchase the board), I've just decided to put it back together and use it like a regular LX (IE: no BT). Not having the BT working will suck, but I'd like to at least keep the channel scan feature on the LXBT since there's not a lot of traffic on the radio here and you have to switch around a lot to catch it.

I'm just going to install a stand alone BT speaker phone and be done with that.

But, here's the problem: I had the front bezel off which means I had to desolder the wires to the back of the mic plug. Thinking myself quite clever, I had pulled out the magnifier and written down the wire color and the corresponding pin number for it.

Now that I'm getting ready to put it back together, well....lets just say there was somewhat of "dog ate my homework" type situation and the paper is gone.
So i need the pinout for the the plug. I can't find one online other than this:

[ external image ]

Top right cobra 6 pin.

and this from a 2010 thread on a different forum:
29 wiring
Pin 1 - Shield
Pin 2 - Audio
Pin 3 - TX
Pin 4 - RX

29 BT wiring
Pin 1 - Shield
Pin 2 - Audio
Pin 3 - TX
Pin 4 - RX
Pin 5 - Bluetooth Mic In
Pin 6 - Bluetooth Hook Switch
Problem is. I can't identify color to function. When i trace them back to the circuit boards I end up with these labels:

Yellow - "mic4" (on display board)

Red - "ptt" (on main board, transmit maybe ?)

White/black stripe - disappears into the harness in a shrink wrap?

Blue - "W11" (main board)

Green #1- "PTT_1" (on display board)

Green #2 - "bt-sw" on display board)


About all I can say for sure is the white/black was on the center pin (#6) which would seem to make it one of the BT wires.

I've written to cobra service in hopes of getting the info, but I've never had much luck in dealing with them. They either don't answer the inquiry (other than the automated response) or it's just some kind of run around until I get tired of dealing with them....

Anyone able to help a guy out here?

:confused:

-- Tuesday, 19 January 2016, 21:51 PM --

OK, after pulling the backshell and looking at the wiring on the mic side I think I've got it figured out.

Going to solder it up and see what happens.

Lord knows asking cobra for help through their web site was a waste of time......







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MDYoungblood
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#376058

Post by MDYoungblood »

I know the feeling when the "Dog Ate It" happens, I had loads of notes disappear and no one here would admit to tossing them in the recycle. Now the first thing I do before removing anything is to snap some pics with my phone. Let us know if you got it figured out.

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harley372019
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#408961

Post by harley372019 »

Did you ever figure this out?







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#408962

Post by MDYoungblood »

harley372019 wrote: May 3rd, 2022, 8:57 am Did you ever figure this out?
It reads he did at the bottom of his post. This was posted way back in 2016, doubt if he will ever see yours or mine.

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