I was given a busted Ryobi SDS drill that I've been looking at fixing. It seems to receive power but the minute the trigger is pulled, it makes a 'poof' sound and I see a brief spark from the brush area. It doesn't trip the power or anything.
I disassembled it and gave it a good clean. The bottom bearing was a bit stiff but after working it with some Q20 and packing it with grease it moves freely again. The brushes still look good, but the commutator was full of carbon so I went at it with an emery cloth and got it nice and clean again. I packed the reciprocating rod on top full of grease (she was empty) but the same issue seems to persist. The motor moves freely, so I doubt it's a mechanical failure. I'm thinking the starter cap is busted, or there is a short somewhere, not that I could see one.
Is it worth fixing seeing as a new one can be had for around R2000? It's similar to this one, but probably an older model as it doesn't have speed control.
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