PWM FAN0, 1, & 2 always on?
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@jallen810 said in PWM FAN0, 1, & 2 always on?:
Another zoomed in a little more:
TR9 and TR5 are clearly damaged, they are for Fan 1 and 2 respectively.
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@bearer Can I replace those myself? I have a pointy soldering iron and would rather try to fix it
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@jallen810 said in PWM FAN0, 1, & 2 always on?:
@bearer Can I replace those myself? I have a pointy soldering iron and would rather try to fix it
Its possible. A very pointy iron might not be the best for removing them, but TR5 has most of the die exposed so it'll be easier to heat up and remove.
To remove small SMD parts with an iron you usually just put a blob of solder on the tip and try to engulf both or all three pins, and when the heat is enough to melt the solder joints on the part it will come off when you lift the iron. Easier with a slightly bigger and flat tip though.
(The only risk you run is to apply too much heat to the board which will damage the traces making repairs more difficult)
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@bearer okay is there a resource for me to go and find which components I need to purchase???
Also, I tried FAN2 with M106 and it's MOSFET (TR1) doesn't look damaged but it's not working correctly either... would that change things? I'm guessing I should replace it too?
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Depends on you location, all the major distributors like digikey, mounser, farnell etc will carry the parts. PMV40UN2R is the part number Duet3d used, but I'm sure there are lots of compatible parts with the same footprint and similar characteristics.
And yes, TR1 for fan 0 can be damaged without any visible damage, you'll probably pay more for postage than parts so just get an extra.
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@bearer Does this Digikey part look right?
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@jallen810 Thats the same as the oringinal yes.
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@bearer Perfect ill order 10 bc I am going to mess it up at least once lol Thank you for your help.
I just found this article on the forum, is this still a valid and applicable troubleshooting and repair guide?
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@jallen810 looks legit yeah.
it aslo covers the more intrusive method of physically cutting the legs off the part to be removed to make it easer, even if you just cut the two in "front" it'll be much easier to desolder the last one. just be careful not to cause any forces that would be lifting on the traces.
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It's been a while but I thought I would update this for the sake of others that may stumble upon this.
I got the mosfets in to try and fix my first board and ended up getting my F0 port to work but only that one so I ordered a new Genuine Duet2 Wifi and got it in tonight and plugged everything back in and now all of my fans work as intended.
Thank you to @bearer and @Phaedrux for all of your help with everything. I learned a very good lesson this week: Don't buy crap quality knock-off products.
