AD2 no longer powers on

[Karlis]

Hi, my AD2 stopped working today. LED would blink for a few seconds, then stop and waveforms would report loosing connection (unfortunately I didn't catch the error code at the time). Now Waveforms doesn't see any device at all and nothing is showing up on the system when I connect the via USB using various USB cables and USB ports.

Inspecting the board, there are no obviously fried components. Confirming voltages as per the board photo in this post,

 

VPLL is 3.3V

VCCD is 3.3V

VPHY is 3.3V

VCCORE is 1.8V

however VCCA is reading 0v

Thanks for any suggestions.

 

 

[attila]

Hi @Karlis

I suspect it is an USB contact issue. According to the datasheet the VCCA and VCORE are driven by the same LDO so probably both are at 1.8V

[Karlis]

Are you recommending replacing the USB connector on the board? Different cables and ports don't seem to make a difference.

[attila]

Hi @Karlis

It looks like the VCCA and VCCCORE are not directly connected inside the FT232H so it could be that the IC is damaged.

For warranty and replacement contact the support.digilent at ni.com specifying the Date of Purchase, Seller and Purchase Order/ Web order Number.