Accidentally shorted FAN0 :( no 5V/3.3V
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@lei261 said in Accidentally shorted FAN0
no 5V/3.3V:Was able to find some parts and wired up 5V and GND like below.
Hm, kinda freestyle
This here is the recommended way:
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Yes it looks like U3 has suffered some damage and would explain the lack of 5v.
You may be able to power the board from USB connection, or from the external 5v in and still function normally. Or if you have the means, you may be able to replace U3.
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@nightowl999
Haha, and yes, after seeing ur signature, I dug really deep in my junk box and did some quick testing xD. The statement itself has some truth in it, so i will shut up and listen
I'm going to try printing with 24V and 5V USB again, maybe the error was just onetime bad luck. But in an ideal world I'd like to fix the problem. I'm currently hesitant to solder an Ext5V onto the board, as I don't have a schematic. Not sure where to solder is the best way to go for a more permanent setup....
But you raised an interesting point regarding CNC, cuz I've been thinking about building a desktop CNC for a couple years. Current plan is to do it next year
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@lei261 said in Accidentally shorted FAN0
no 5V/3.3V:I'm currently hesitant to solder an Ext5V onto the board
So would I be! Can't you use the miniUSB port (if there is one on your board)?
Having said that, if it's broken, it's broken!
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@phaedrux @nightowl999
I initially had some errors reporting with 24V and 5V USB, that's why I wanted to look deeper and fix the problem.
Now I think about it, maybe I had some other loose wires, I will reconnect everything and try again.
Thank you again for the prompt reply! -
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This post is deleted! -
Been using USB as 5V source, and printer has been printing for >20hrs without any issues. Thanks again for the advice.
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@lei261
A lucky break!Don't short anything else, you might not be so lucky next time
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@lei261 you are vary lucky not to have damaged anything. Typically, excess voltage applied to the 5V rail damages the 3.3V regulator and quite often the microcontroller and network module too. In your case the A4988 chip appears to have shorted out the 5V rail before more damage was done.
BTW Duet 3 boards (except for the Tool Board) are protected against this type of short, however other devices connected to 5V such as PanelDue are not protected and would still be likely to suffer damage.
