PWM fan controller possibly destroyed - advise requested
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See https://duet3d.com/wiki/Connector_and_spare_part_numbers#Fan_mosfet for info on replacing the PWM fan mosfets.
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Thanks David! I just ordered some mosfets. We'll see if I end up actually doing it, or whether I decide to cut my losses and just the the Duet Wifi as presently configured, since it is in fact working now.
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I just wanted to say that I just replaced my fan1 mosfet as I must have shorted some wires during installation. I don't have a hot air station and I'd never done any surface mount soldering before, but I did get it replaced and with no collateral damage. Had I known the package with the mosfets was getting delivered that day, I would have waited until afterwords for my normal coffee break as the hands were a bit jittery after that caffeine injection.
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Fabulous, had the same problem, ordered the part, question though.
I still measure 24v coming from the wire .
Would you still measure voltage if its the mofset blown?
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Im not bad at soldering with an iron, but dont have a hot air gun solder station is it going to be possible to change the mosfet with a temp controlled iron, magnifyer, a steady hand and nerves of steel?
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The tricky part is removing the old mosfet without lifting the PCB traces. I've never tried that without using hot air to heat all 3 joints at the same time. I found this video on removing SOIC ICs without hot air: https://www.youtube.com/watch?v=tlSY1uaw0GA. Maybe it would work for small mosfets too.
The new mosfet can be soldered in place using tweezers and a soldering iron with a fine-tipped bit.
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that video makes it look too easy, We will see I guess possibly this week end then I get get my Printer to be quiet again, Thanks Admin Great board.
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Did it in 20 min with my intermediate soldering skills. Fan started working right away. Thanks guys for the clear info on what , where , and making possible the components to be replaced.
Cheers
Stav -
The tricky part is removing the old mosfet without lifting the PCB traces. I've never tried that without using hot air to heat all 3 joints at the same time. I found this video on removing SOIC ICs without hot air: https://www.youtube.com/watch?v=tlSY1uaw0GA. Maybe it would work for small mosfets too.
The new mosfet can be soldered in place using tweezers and a soldering iron with a fine-tipped bit.
I cut the legs and de-soldered each one. I was not comfortable using my hot air station there as it's pretty dense.
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My worry has always been that if I try to cut the legs, the PCB pads would lift. I guess it's OK if your cutters are sharp enough!
