UC300ETH stoppedcommunicating

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UC300ETH stoppedcommunicating

Postby Vance » Fri May 29, 2020 10:36 pm

It has been working fine. Then today it stopped communicating. I checked the power supply, cable and reset the board.

I removed the cable and the amber/yellow light stays on.

Any idea what might be wrong?
UC300ETH not communicating..jpg
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Vance
CNC Router Parts 48/96, 23,
ST-M5045 drivers
/ETH-5LPT/UCSB
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Re: UC300ETH stoppedcommunicating

Postby cncdrive » Fri May 29, 2020 11:27 pm

It's abnormal that the amber light in the RJ45 jack is on when no cable is plugged into the connector.
I have never seen anything like this, but because that LED is controlled by the ethernet MAC chip on the board I suspect that that chip went wrong.
Or maybe there is a problem with the ethernet magnetics inside the RJ45 jack.

I would also check for fallen chips etc. on the board or inside the RJ45 jack.
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