All those changes would very likely have been made at the factory and other changes would probably also have been made to accommodate them. Sometimes the designers make a mistake and/or a circuit behaves differently to their calculations so these kinds of changes are made, to achieve a performance, function, or stability goal. The changes above are definitely NOT applicable to other situations in this equipment, or in any other equipment.But 10uF 16V substituted for 0.47uF 50V? How can that part work there?
In my opinion using a bipolar electrolytic instead of a polar electrolytic is a bad idea, but a solution nevertheless. (if the reason is that you just don't have a polar one available). Film capacitor replacements for polar or bipolar electrolytics is always a good idea, space permitting.
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