I am replacing most or all of the capacitors on the mainboard of my old Roland XP-50 synthesizer (my original thread is here, not that it’s necessary for context). I have replaced several successfully, but in my inexperience along with my horribly cheap tools and likely cheap/expired adhesive on the board I have managed to snap off a few surface-mount pads. I did try watching videos and reading threads and articles for advice but nothing seems to apply to the particular situation I’m having.
Be forewarned, these photos are probably cringe-worthy for the more seasoned guys here haha, but I don’t have the budget or desire to outsource this and I had already written off this unit at the outset, so there's nothing to lose by getting my hands dirty and using this as a learning experience.
So here is the first of the two trouble spots. These are composite images because I was using a macro lens that can only focus on a small area. I drew a red line where I believe the pad connects to the trace and where it ends.
How would you recommend I fix this? I want it to be secure but it doesn’t necessarily have to be pretty. Could I, for example, run a wire from the leg of the capacitor straight to resistor R18 (with the code 222)?
Note that I'm replacing the surface mount capacitors with through-hole capacitors by bending feet and soldering them to the pads, if that makes a difference in how to best go about this. (I went with these because they looked easier to solder with the equipment I have, they were cheaper, and the vendor didn't seem to have the same size SMD's as the originals so I was worried they wouldn't fit.)
Here is the other spot, which looks trickier to me:
In this case both pads are missing. The negative pad on the left looks like it goes into the hole diagonally next to it. The positive pad goes over to the hole at the right. Can I solder wires directly from the feet of the capacitor to these holes? If so, this area is insanely tiny so I’m not sure how to best solder the wires there with the cheap soldering iron I have. Any advice on that would be helpful. Also I would need a way to physically secure the capacitor if both legs are solely connected to wires rather than mounted on the board. I'd rather not have it rattling around in there...
Or, is there a whole other way you would recommend going about these repairs?
Again, sorry for the cringey photos and just know that I’m fully aware how bad I’ve butchered this. (In my defense I did about six other capacitors without a hitch, maybe not the cleanest work but I’m getting better as I go!) I’m going to invest in a soldering station with a heat gun and better precision tips since the iron I have now is one of those bottom-of-the-barrel $7 abominations -- e.g. the point of the tip doesn’t get as hot as the sides so I have to lay it down across any joints I’m soldering (maybe just a tip issue?). Anyway I’m sure a replacement is a good first step. Any recommendations on which tools and accessories to buy or techniques I can employ for the issues above is very much appreciated!
EDIT: I still have the three pads that fell off, they're just a bit bent up. I could flatten them and reglue them to the board, and somehow reconnect them to their respective traces if that's possible. I'm just not sure of how to best do that, especially reconnecting them to the traces.
Be forewarned, these photos are probably cringe-worthy for the more seasoned guys here haha, but I don’t have the budget or desire to outsource this and I had already written off this unit at the outset, so there's nothing to lose by getting my hands dirty and using this as a learning experience.
So here is the first of the two trouble spots. These are composite images because I was using a macro lens that can only focus on a small area. I drew a red line where I believe the pad connects to the trace and where it ends.
How would you recommend I fix this? I want it to be secure but it doesn’t necessarily have to be pretty. Could I, for example, run a wire from the leg of the capacitor straight to resistor R18 (with the code 222)?
Note that I'm replacing the surface mount capacitors with through-hole capacitors by bending feet and soldering them to the pads, if that makes a difference in how to best go about this. (I went with these because they looked easier to solder with the equipment I have, they were cheaper, and the vendor didn't seem to have the same size SMD's as the originals so I was worried they wouldn't fit.)
Here is the other spot, which looks trickier to me:
In this case both pads are missing. The negative pad on the left looks like it goes into the hole diagonally next to it. The positive pad goes over to the hole at the right. Can I solder wires directly from the feet of the capacitor to these holes? If so, this area is insanely tiny so I’m not sure how to best solder the wires there with the cheap soldering iron I have. Any advice on that would be helpful. Also I would need a way to physically secure the capacitor if both legs are solely connected to wires rather than mounted on the board. I'd rather not have it rattling around in there...
Or, is there a whole other way you would recommend going about these repairs?
Again, sorry for the cringey photos and just know that I’m fully aware how bad I’ve butchered this. (In my defense I did about six other capacitors without a hitch, maybe not the cleanest work but I’m getting better as I go!) I’m going to invest in a soldering station with a heat gun and better precision tips since the iron I have now is one of those bottom-of-the-barrel $7 abominations -- e.g. the point of the tip doesn’t get as hot as the sides so I have to lay it down across any joints I’m soldering (maybe just a tip issue?). Anyway I’m sure a replacement is a good first step. Any recommendations on which tools and accessories to buy or techniques I can employ for the issues above is very much appreciated!
EDIT: I still have the three pads that fell off, they're just a bit bent up. I could flatten them and reglue them to the board, and somehow reconnect them to their respective traces if that's possible. I'm just not sure of how to best do that, especially reconnecting them to the traces.
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