Rambo board or thermistor problem causing mintemp error?
 
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thejonathankane
(@thejonathankane)
New Member
Rambo board or thermistor problem causing mintemp error?

Hi all. I have a Prusa MK3S

I started getting a mintemp error where the temperature for the hotend was approximately 10°C lower than the ambient temperature for the heatbed. I was also getting an error where prints were failing on the second layer due to thermal loss. 

So I ordered a new thermistor from somewhere here in Australia. I've tried to install it, but it's still not working. I have a new hotend on the way from Prusa, and I've tried a new hotend heating element. I'm pretty sure the error lies with the thermistor. 

I got a multimeter and started testing things. When I check the voltage of the 2 pins where the thermistor should go, I get no reading. Every other connector reads about 5 volts. 

I think I've stuffed the Rambo board. Most likely from trying to pull out the connector from the thermistor. 

Just to clarify, there's no way to fix the Einsy Rambo board is there? If one of the connectors doesn't send power to it's part, it needs to be replaced?

Thanks for your help guys. First time posting, and much appreciate all of your knowledge. 

Jonathan

Posted : 13/01/2021 6:05 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Rambo board or thermistor problem causing mintemp error?

For this one, I would contact the support Chat.  This is especially true if you are in the Warranty period.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 13/01/2021 12:05 pm
thejonathankane
(@thejonathankane)
New Member
Topic starter answered:
RE: Rambo board or thermistor problem causing mintemp error?

@cwbullet

Okay thank you for the advice. I will do that.

I'm pretty sure I'm outside my warranty period though. 

Posted : 13/01/2021 12:08 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Rambo board or thermistor problem causing mintemp error?

@thejonathankane

They may still be able to provide guidance.  I have had to replace on controlled board.  For $100, it is not worth burning down my house.  I chose to replace rather than repair.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 13/01/2021 12:12 pm
thejonathankane
(@thejonathankane)
New Member
Topic starter answered:
RE: Rambo board or thermistor problem causing mintemp error?

@cwbullet

Okay, thank you for the advice Chuck. I've messaged Prusa support. Should I update this post with their response?

Posted : 13/01/2021 12:35 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Rambo board or thermistor problem causing mintemp error?

@thejonathankane

I would.  Did you use the chat or email?  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 13/01/2021 2:03 pm
thejonathankane
(@thejonathankane)
New Member
Topic starter answered:
RE: Rambo board or thermistor problem causing mintemp error?

@cwbullet

I used the contact us page here: https://shop.prusa3d.com/en/contact-us

Where is the chat feature? I couldn't find it on the website. 

Edit - Nevermind, I found it!

This post was modified 10 months ago by thejonathankane
Posted : 13/01/2021 11:27 pm
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