Hi,
@neotko this is this post https://ultimaker.com/en/community/19803-probleme-ventilo-et-solution?page=last but Zizon have deleted the thread and now pictures are out.
this is the original picture.
@aelric23 do you have a multimeter ?
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neotko 1,417
Umo+ bc817 transistor for me it's broken when:
- Fan stays full power at any setting
- Fan at 255 goes slower than at 100
Best way to check it for me it's to plug a led light 24v (I use the ones that ultimaker uses on um2).
Other test it's just to plug the fan on the led pwm and turn the lights on. To do so install amedee custom firmware builder that will add a 'led' controller on your ulticontroller. This way you can check if the fan works.
Btw it's very important to check the +/- before pluging a led/fan to a um2.1.x board because if you plug them inverted the transistor dies almost instantly.
Search on google bc817 neotko transistor ultimaker for many post that I did about how I fix my transistor 6-7 times already.
Ofc one think. I remember that there was a post in french where @electromu was talking with someone about how to test if the transistor was or not dead. But I can't remember where was that post since it was on french. @electromu do you remember that post?
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