PSU Damage - a simple fuse or a new power supply?
 
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AngryAdmin
(@angryadmin)
New Member
PSU Damage - a simple fuse or a new power supply?

I had the electronics enclosure open to work on my fan connectors, and in a stroke of genius forgot to unplug the PSU. Long story short (pun intended), my power supply will not be supplying my printer with power anymore. Does anyone know if the PSU with the Mini+ has a fuse? In other help topics, it seems other models have fused PSUs, however I can see no evidence of a fuse on the power supply itself or its label, and some googling isn't giving me any help either. 

Posted : 28/07/2021 6:50 pm
cwbullet
(@cwbullet)
Illustrious Member
PSU

You have probably fired it.  I am not tracking a fuse in the mini power supply and I have 5.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 28/07/2021 7:16 pm
abacabie
(@abacabie)
Active Member
PSU

In the UK we have a fuse in plug, not sure were you are based, if you have a multi meter check i would check the supply for voltage, at a guess there is most likely a fuse in the PSU, not sure if shorting it would cause it to trip though or how easy it is to open.

Posted : 28/07/2021 10:19 pm
AngryAdmin
(@angryadmin)
New Member
Topic starter answered:
PSU

I did probe it, and I am getting no voltage. I was able to open it (just some security torx screws) but couldn't find any fuses on the board. I may do it again and remove the shielding, but I doubt a fuse would be buried that far.

Posted : 28/07/2021 10:26 pm
JoanTabb
(@joantabb)
Moderator
Fuse

there is a fuse in the input socket, between the IEC Plug hole, and the switch. 
Circled in Red below


Circled in Red
Regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 28/07/2021 10:38 pm
AngryAdmin
(@angryadmin)
New Member
Topic starter answered:
PSU

I apologize for not making sure this was understood, but this is the power supply in question:

https://shop.prusa3d.com/en/minimini/1026-psu.html?search_query=Psu&results=7

Posted : 28/07/2021 10:58 pm
JoanTabb
(@joantabb)
Moderator
power brick!

Ah, less repairable! 

sorry. 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 28/07/2021 11:05 pm
Nikolai
(@nikolai)
Noble Member
.

Usually such power supplies have short circuit protection. I would suggest to contact Prusa Support. They can provide a better recommendation how to proceed. My guess is a new PSU.

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Posted : 29/07/2021 8:21 am
cwbullet
(@cwbullet)
Illustrious Member
psu

As @Nikolai said, contacting support is not a bad option.  I would not try to repair the power supply yourself.  I had one fail and replaced it with a Chinese knockoff.  I ended up having to replace that one within 6 months so just buy an original.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 29/07/2021 9:24 am
karl-herbert
(@karl-herbert)
Illustrious Member
Meanwell instead of orig. Prusa Mini PSU

My Mini's PSU also went goodbye and I installed a 360Watt Meanwell PSU with a suitable plug for this purpose:

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 29/07/2021 11:18 am
cwbullet
(@cwbullet)
Illustrious Member
psu

 

Posted by: @karl-herbert

My Mini's PSU also went goodbye and I installed a 360Watt Meanwell PSU with a suitable plug for this purpose:

Has they worked well?  I have contemplated the same.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 31/07/2021 1:43 am
karl-herbert
(@karl-herbert)
Illustrious Member
RE: psu

The plug assembly requires a bit of dexterity. In any case, the power supply and plug work perfectly. The only thing thats a bit annoying is the rather loud Meanwell fan.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 31/07/2021 10:42 pm
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