Blown fuse
So right when my 2 hour print was about to finish i heard a pop and printer shut down.
The fuse above the plug in the PSU was fried. im thinking ok no big deal, so replaced the fuse and nothing.
Any ideas
Re: Blown fuse
https://shop.prusa3d.com/forum/original-prusa-i3-mk3-f30/power-supply-failure-t13443.html
Re: Blown fuse
i checked the thermistor and it looks fine. i didnt hear any clicking from the psu during the print.
Re: Blown fuse
i checked the thermistor and it looks fine. i didnt hear any clicking from the psu during the print.
get on chat https://shop.prusa3d.com/
and ask for a replacement.
Re: Blown fuse
was on chat looking for support, they said to contact via email as they are to busy for chat support right now.
Re: Blown fuse
You may be a victim of a power supply problem that is being discussed here https://shop.prusa3d.com/forum/original-prusa-i3-mk3-f30/power-supply-failure-t13443.html especially if you live in the US and are on 110V AC.
Re: Blown fuse
yes im in us
Re: Blown fuse
i checked the thermistor and it looks fine. i didnt hear any clicking from the psu during the print.
Not everyone with a blown PSU has seen exactly the same behavior. Mine definitely clicked (constantly) but had no visibly burned components (just a burning smell).
Re: Blown fuse
i checked the thermistor and it looks fine. i didnt hear any clicking from the psu during the print.
Clicking is irrelevant. My thermistor looked fine as well (I later noticed a different part looked damaged, but some see no visible damage).
For your fuse to blow, there are three possibilities:
1) bad fuse (unlikely)
2) line voltage spiked and sent too much current through (unlikely)
3) PSU drew too much power
It is quite likely that #3 is the issue, and that it is a sign that your PSU just died. You can try to replace the fuse and plug it back in, but I would disconnect your PSU from your Einsy before I do that (wouldn't want a bad PSU burning out your Einsy). Replace the fuse, plug it in (making sure the 24V wires to the einsy are loose and are not able to touch each other), and measure the voltage. If you have 24v, you may have had a temporary issue. If you have 0V, your supply blew and took the fuse with it.
If you have a quick bzzzt sound, a puff of smoke, or an ozone smell, that would also be an indication of a dead PSU.
Contact prusa on Monday, and figure on 1-1.5 weeks before they send a replacement. Meanwhile, if you want to print, pick up a 24V 240+W PSU and wire it up. The Meanwell 350 ($50 on Amazon) seems to work well, but it has a fan that can be annoying. I've got a mount for it designed over on the blown PSU thread.
Good luck.