Possibly fried duet with an in spec power supply
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I'd use a current limited supply to avoid damage, but thats because I have one.
Then again I'm inclined to think whatever is the culprit is already damaged, so its possible you'll let some smoke out, but odds are that part is already living on borrowed time.
(Ref the community repair thread, the guy in the US only recently passed, and I fear he left an unexpected void on so many levels; rest his soul)
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@bearer OH NO, so when they said sadly no longer with us, he didnt mean assisting... he meant... That is sad.
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Was that unclear? I'm open to changing the wording, tried keeping it short for some reason.
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@Luckypriest said in Possibly fried duet with an in spec power supply:
So @bearer and @droftarts whats the consensus? Think I should hook it up to another PSU and see if more magic smoke comes up?
I'd say you have nothing to lose. I remember seeing a lot of Duet 0.6 boards with burnt processors like that, usually from shorting VIN directly through the processor, usually on thermistor inputs or endstops. But the Duet 2 has a lot more protection on it against that.
Try hooking up VIN without USB connected and SD card removed, see what power LEDs come on (on the edge by the reset/erase buttons). With luck, it will show that either the 5V or 3V regulator has died. The board may not power up, but it might mean you can look for other places that may be shorting.
Ian
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@bearer its not that its unclear, but when it comes to a project like assisting people with fixing electronics I just didnt think departed. Just thought he helped x amount of time and is no longer helping.
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@droftarts said in Possibly fried duet with an in spec power supply:
However, if you contact sales@duet3d.com, we have a small stock of refurbished Duets that may reduce the cost of replacement.
Given the damage to the CPU who knows what else could be gone or about to go, so this may be your best option over repair.
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@Luckypriest said in Community repairs?:
@Luckypriest Or at least give me recommendations / links for the parts and a friend of mine and I might try to wing it for fun.
While its more likely the cpu needs replacing than the wifi, i'd start with the wifi because its cheaper and easier. Its off to one side of the board and no huge ground planes, 2mm pitch instead of 0.5 or 0.4.
ESP12F module (or ESP07S if you want external antenna)
You'll find schematics and design files with partnumbers here if you want to try your hand at the CPU
https://github.com/T3P3/Duet/tree/master/Duet2/Old versions/DuetWifiv1.02 -
@Luckypriest or remove the ESP and test it with an Arduino?
Ian
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@droftarts said in Possibly fried duet with an in spec power supply:
@Luckypriest or remove the ESP and test it with an Arduino?
Ian
oh yes! or an ftdi 3.3v usb ttl adapter could also be used, (maybe evnen prior to removal to see if the uart on the esp is ok - but depending on the fault it might work outside the circuit even if it doesn't work in the circuit)
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Thanks guys, this is a lot for me to process. I'm going to try giving the wifi replacement a shot, and if that doesnt work might play around with CPU replacement, if only to see if I can. This is a lot for me to process, fairly new to actually messing with circuit boards.
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if you remove the wifi and find it faulty, there is now the option to use a Raspberry Pi like the Duet3, so if you have one (not 1st gen and not zero) laying around that might be an option once support is fully tested and released.
(Low temperature bismuth* solder or a chipquik smd removal kit will make removal of chips with external pins a lot easier and reduce the risk of damage to the board. Some good flux also makes installing new chips a lot easier
*) 57Bi42Sn1Ag or 58Bi42Sn alloyes seem common even with no-name brands)
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Thanks again. I have the new board updated, that went fine. Wired up power supply and tested voltage. Using a 360w power supply this time. Tested it. Wired for board but havent turned it on because.... I'm not nervous your nervous.
Anyone see any issues?
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Bearer did me a solid and looked over it, recommended better terminal connection. POWERED ON! We in here bois.
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@Luckypriest, did you try to replace the WiFi module? I think there is a good chance that will get the board working.
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@dc42 I havent yet, got a replacement board and successfully got that powered on. Doing that replacement is going on the backburner for a bit while I finish this printer. I've gone ahead and marked this topic and closed.