Duet 2 Wifi board fried (U3 Chip damaged)
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Hi there!
We have the duet 2 wifi boards in all of our printer and are extremly happy with them. At the time we are developing a multi-material-system and built our selves a test rig for that.
At this test rig wejust hooked up all the wiring for the printer and turned it on. The PanelDue didn't light up and the BLTouch didn't do his up/down routine as alwasy. After some seconds there was a spark and I turned the printer off immediatly!
When we checked the board we could find a little whole in the 5V regulator marked as U3 on the board.
Here is a picture of that:
![0_1560246302823_IMG_20190611_104517[1]-min.jpg](/assets/uploads/files/1560246309526-img_20190611_104517-1-min-resized.jpg)
After some researchand we found these threats which relate all to the same problem:
https://forum.duet3d.com/topic/9421/u3-buck-ruptured-admin-please-advise/8
https://forum.duet3d.com/topic/9212/duet-wifi-board-sparked-on-first-time-usb-connection
https://forum.duet3d.com/topic/8242/how-to-extrude-until-trigger/37The question no is if there is a way to fix this?
Best,
The CHANGE3D GmbH Team -
@CHANGE3D-GmbH the U3 regulator produces the 5V used in the system. Can you provide a bit more detial about what 5V loads are part of your test rig. I also wonder if there is a possibility that in wiring up the test rig 24V/12V could have been shorted to 5V or 3.3v?
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Hi T3P3Tony
Thank your vey much for your fast response!
5V is used by following components:-
BLTouch
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3 Endstops
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PanelDue
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2 thermistors
I am quite sure that 24V is not shorted to 5V/3.3V because the system worked before without any problem.
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@change3d-gmbh I asked because you indicated that the board was working before, then you hocked it up to the test rig and then it was blown. Can you let me know which generation of board it is (1.04 or 1.04a etc)
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Yes thats the case! I am pretty confident that I hocked the system up correctly like I did a hundret times before. Could a faulty wiring of the BLTouch have such a big impact like frieing the U3 regulator?
The board is versiion 1.04.
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Since there was no answer for a long time (and I was in holyday) I retry to find a solution for my problem. It would be a shame to trash such a nice board with just one component damaged...
Any chance that there is a solution to repair the board or tp get it replaced under warranty?
Best Markus
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@change3d-gmbh said in Duet 2 Wifi board fried (U3 Chip damaged):
Since there was no answer for a long time (and I was in holyday) I retry to find a solution for my problem. It would be a shame to trash such a nice board with just one component damaged...
Any chance that there is a solution to repair the board or tp get it replaced under warranty?
Best Markus
I approve a replacement under warranty.
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Thanks a lot, I will try then!
Best Markus
