Re: Xpander recap strategy
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>>If You are *sure* You need to recap Many years ago, I had posted messages about squirrely sounding?voices (which also failed auto-tune0. PeWe and others referred me to specific?caps, but I never got around to replacing them. It seems like a good idea to do now while I have the time (actually, the space).
All of your tips are good advice-thanks
>>don't forget the IEC mains power socket - replacing that should be the first thing on Your list if Not sure what you're referring to? IEC? I don't remember?hearing of this needing to be replaced, whatever it is ;-)
If You are *sure* You need to recap, it's all about keeping focus. Once You get into a safe routine for the board You are working on - the heat you need to remove the old cap, using whatever method You prefer that will not kill pads or lift traces, all You need to do is make sure you have really good pictures of the component side of the board,? so You can be 100% sure of the polarity of the replacements, then check Your work after each replacement. Do NOT remove all the caps and then try re-populate the board thinking it will save time, just do one at a time, and once it is installed, and confirmed as correct, mark it with a sharpie and move on.
Working out which solder mounds to remove, for what component, is a PITA. Flipping a board over & over trying to guess can be tiresome, but there is no substitute for simple counting - "...5 rows from the edge of the board.." - best just wear surgical gloves, use an anti-static desk mat, and count :) You can put sharpie do
The real trick to this is to get a feel for the board, and to make sure You have all the things You need to make the job work. Everybody has their own workflow that they prefer - Me, i like braid, flux, 350C hot & short contact for removal of solder (since it has plenty of lead) then high-lead content solder for the new part, then a brush with a toothbrush and IPA to finish.
You _can_ get away with just replacing the larger caps, and any tants - testing them with a meter upon removal will usually tell you if You are doing the right thing. You do not really need to replace every single cap ever, no matter what the internet or Youtube tells You.
Also, don't forget the IEC mains power socket - replacing that should be the first thing on Your list if You are having suspected cap-related instability/boot issues.
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