View Full Version : Board Replacement confusion

9th July 2014, 03:36 PM

Just got a couple of your Board Replacement regulator units.

I plugged in the power out from my vTx ( Boscam 400mW 12V output) to the board as per the circuit board labels. Powered up and ... smoke from the vTx. Probably blew the vTx.

Then I notice on your website, the + and - polarity is the opposite in the picture compared to on the circuit board ... positive-in at card edge, whereas the CB label says negative-in is at card edge

so which is it?

Board replacement did not come with instructions and none on your website either, no warnings, nothing.


9th July 2014, 09:44 PM
The plug and play replacement board is for hw plug and play transmitters not for Boscam. They look totally different from each other and the board don't even fit on Boscam transmitters or has the soldering points. (See below).
All directions and polarity on the hw plug and play board are correct.
We will issue an RMA number so you can return it for refund. :)
What is your order number?

9th July 2014, 10:19 PM
I am using it as a regulator from 12V to 5 Volt to power a camera and 5V OSD. That is all I am using it for. There is no damage to the HW board itself, nor any downstream components (OSD or camera).

the factory defect I suspect is the mislabelled ground/positive on the power in. Caused a short in the 12V-out circuit from my Boscam unit (fixable if I find the right diode)

I will take some picture so you can see for yourself

9th July 2014, 10:44 PM
here is the conflict, seen in images

your website picture: The Positive-in is next to the board-edge


the actual 'Board Replacement' unit I got.

Note the 'Ground' for power in is next to the board edge (note I switched the 'power in' plug to match your website after the vTx was blown. originally I had the power-in plug as per the circuit board labels when the vTx diode blew)

http://i285.photobucket.com/albums/ll75/bcsaltchucker/HW-BRissue_zps2fa4e783.jpg (http://s285.photobucket.com/user/bcsaltchucker/media/HW-BRissue_zps2fa4e783.jpg.html)

( don't want to send this board back, just want to know how it works. Would like a new vTx though :) )

9th July 2014, 11:06 PM
Thanks for posting the picture, that definitely helped.
The white print on the board is incorrect, manufacturer printing error, I'm sorry about it.
Please contact our customer support using the link below mentioning this thread, and I'm sure they will assist you with this issue.

Thank you,

10th July 2014, 12:11 PM
Thanks so much. You have a great company to deal with, and I have sent many friends your way in the past year.

and update .. I am using the board with the corrected wiring and it works flawlessly now.

11th July 2014, 01:30 PM
You're welcome! :)
We appreciate your business and support!

Thank you,