EEVblog Electronics Community Forum
Electronics => Repair => Topic started by: guix on October 15, 2024, 10:50:07 pm
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Hello,
I have this broken smd cap for a stepper motor driver on a 3d printer motherboard, unfortunately one leg is broken, and I don't have a similar capacitor at hand.
But I have thru hole capacitor of the same value (also marked "low esr, -40+105°C"), so can I use it instead or is it not recommended ?
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It should work: how would you secure it mechanically?
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It will work fine if you can figure out how to attach it. I have done it by cutting the leads to leave just enough clearance to get a soldering iron tip to the pad, which is not the best mechanically, but good enough in most repair applications.
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The pads on the board are also broken :)
I plan to place the capacitor laying on its side (like it is on the picture), solder the + to the diode just below and the - to the nearest ground (or I remove the silkscreen near the "creality" logo), making the legs as short as possible, then hot glue so it can't move
Thanks :)
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Yes you can, but besides the capacitance beware its temperature and voltage rating. Also, some caps are low ESR for a reason.
I usually just use high temperature silicon to keep them in place.
For the broken pads you just need to scrape off some solder mask to find new copper.
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you have some pads left, search where they go and solder a cap on the part destination, nearby diode etc ....
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That should do it :)
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Bodge's your uncle.
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This is how you do it.
Replacing the copper pads only for the looks of it - waste of time