Analog Discovery Studio

[Leo_W]

After an ADS is powered on, the power light is normally on, but it cannot be recognized by the computer. After testing, the AD2 part can be used normally, and the usb port lacks 5V input. C23 measured down to 0V, the normal should be 5V, the usb port pin is also 0V. R22 measured only 2.07V, the normal is 3.3V, the device voltage around IC6 is abnormal, IC7 can only measure 2.07. Don't know where the 3.3V comes from?
And my IC3 is unusually hot, I suspect that the chip is short-circuited and burned out, but I lack the schematic, do not know the IC3 model?

[attila]

Hi @Leo_W

IC3 is USB2513B/M2

 

[Leo_W]

Hi @attila

I tested it and found that the two 3V3s didn't seem to be connected together.

I will try to replace IC3 first to see if it can be repaired. The IC3 did burn out when tested.

Edited June 21, 2023 by Leo_W

[Leo_W]

Hi @attila

After replacing the IC3, it can be used normally. Great, thank you very much！

[attila]

Hi @Leo_W

Good to hear that.

Do you know how it got damaged ?
Could have been a temporal short on the USB_D3_P/N lines which go to the canvas connector J13 ?