Solved Duet 3 6HC Turn off USB power (5V)

[Razani]

Hi,
I have a pick and place machine controlled via a Duet 3 6HC.
I have a classic AC switch to turn the machine on/off.
The Duet is powered via a 24V source and at the same time commands are sent directly via USB.
My problem is that when I turn off the machine with the switch, the duet still runs on 5V from the USB. Is there a way to turn off the 5V USB power for the duet so I don't have to unplug the USB from the computer when I turn it off. I don't want to use the method of cutting the 5V wire in the USB cable, so I'm wondering if there is some other, more elegant way.
Thank you very much.

[Andrey]

This post is deleted!

[dc42]

@Razani you would need to remove the diode on the 6HC that feeds USB power to the Duet 5V rail.

[Razani]

Thank you for your reply.
@dc42 But do you mean a classic rectifier diode or an LED? And if so, which diode should it be? Around the USB port I see diodes marked D23 (LED), D32, D10.
I have Duet version v1.01a.
Well thank you.

[dc42]

@Razani you can find the schematic at https://github.com/Duet3D/Duet3-Mainboard-6HC.

[Andrey]

@Razani

I beg your pardon for first misleading answer...

Looks like it depends on your 5V power source anyway (D10 for external, D32 for internal regulator).

[Razani]

Problem is solved,
I removed diodes D10 and D32.
Now the USB no longer supplies the Duet with five volts and the USB communication works properly.
Thanks for the help.