61-33 chip blow out
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@dombee said in 61-33 chip blow out:
I guest the shield of the usb port should be grounded?
(on) my maestro (the usb) isn't, the microSD slot is, and the ethernet isn't - which seems to make sense to avoid ground loops.
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@bearer
I mean conductivity not 3.3V
When i try with 2 working port i have conductivity
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@bearer on the Maestro ethernet shield should be grounded through a large resistor (1M ohm)
https://github.com/T3P3/Duet/blob/master/Duet2/Duet2Maestro_v1.0/Duet2Maestro_Schematic_v1.0.pdf -
@T3P3Tony said in 61-33 chip blow out:
@bearer on the Maestro ethernet shield should be grounded through a large resistor (1M ohm)
confirmed, but outside the measurement range ..
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@dombee said in 61-33 chip blow out:
@bearer
I mean conductivity not 3.3V
When i try with 2 working port i have conductivityworking and being correct isn't always the same thing This is for the Wifi, coupled though a cap:
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It's official, the ground on the usb port don't works
il plug the cable an put the ground usb wire to an other place and its working -
That has nothing to do with the shielding as such. More likely the usb socket is bad, or the ground pin is poorly soldered to the PCB. (ruling out issues with cables or the far side).
Could have been damaged by the initial incident as well.
(In fact if the usb shield was grounded you'd have the supply current run through the shield (no bueno) which is part of the reason its decoupled with the capacitor as shown in the schematic.)
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i juste replace the wifi module
i erase the firmware
in port com i see bossa program port
when i selec the right port in bossa he shut down.when the usb was on i vas 4 led open:
red 5v+
green 3.3v
red between reset and usb
red dial -
@dombee said in 61-33 chip blow out:
i juste replace the wifi module
i erase the firmware
in port com i see bossa program port
when i selec the right port in bossa he shut down.when the usb was on i vas 4 led open:
red 5v+
green 3.3v
red between reset and usb
red dialWhat shut down: the Duet? Did the red and green LEDs go off? Were any components on the Duet getting hot?
The PC will shut off the USB port if it detects that too much current is being taken from it.
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Bossa program shut down
i try with sam -ba and it's said enable to connect
Nothing seems hot -
And the LEDs?
Did you remove or replace the SD card? The old one was probably blown.
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yes i replace them