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PSU cable fried  

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chuels6969
(@chuels6969)
Member
PSU cable fried

Good day dear Prusa community,

I started my morning by trying to print some more Parts for my garden when suddenly it started smelling weird and a bit smoe came out from my Prusa MK2.5S - cutting long story short, it seems like one of the connections from PSU has fried the cable and molex connector including the pug on the board at partially.

Question now is, can the plugs on the board be replaced or do I need a new board which is obviously one of the more expensive part for the printer? 🙂

Pictures attached 😎 

Kind regards Carsten

Posted : 08/09/2024 11:23 am
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: PSU cable fried

The plugs and sockets can be replaced.
you are best replace both plugs and sockets at the same time. 

Some folk use XT60 connectors soldered directly to the PCB in preference

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 : 08/09/2024 12:53 pm
chuels6969
(@chuels6969)
Member
Topic starter answered:
RE:

HI @JoanTabb - thank you very much for your response, so for the cable connectors that is an easy going I think and a good hint for the XT60 - I was looking at EC3 or EC5 connerctors.

I assume the sockets on the board need to be bought somewhere else, any idea which were used - I am not so into board connectors to be honest 😀

Kind regards

Carsten

Posted : 08/09/2024 2:36 pm
JoanTabb
(@joantabb)
Veteran Member Moderator
RE: PSU cable fried

I guess that depends upon where you live!

I think this is the connector you are looking for

Description Pluggable Terminal Blocks 5.08MM EURO HEADER VERT BLK 4CKT
https://www.molex.com/en-us/products/part-detail/395311004?display=pdf
Molex part number 39531-1004
Mouser Part Number 538-39531-1004

these are available from China, but may be of lower quality than the genuine versions. 

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 : 08/09/2024 8:28 pm
chuels6969
(@chuels6969)
Member
Topic starter answered:
RE: PSU cable fried

Hi Joan, great thanks I will have a look where to get them 👍 

Posted : 09/09/2024 12:08 am
dapug
(@dapug)
Eminent Member
RE:

@chuels6969, I would not bother with the Molex connectors.  Get 5mm screw terminals or the x60.  Those Molex failed because it is the WRONG part for the job, horribly bad design.

Mine burnt out 3 times (fixed one end with terminals, and then the other end burnt out, grrrr, VERY dangerous). I am so done with it, I am upgrading the mainboard to the newer MK3.  See my post here:
MK3S+ Hot End on a MK2.5S. Which firmware? – Hardware, firmware and software help – Prusa3D Forum

This post was modified 3 weeks ago 2 times by dapug
Posted : 02/11/2024 7:20 am
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