Wiring diagram for the power supply stage of the CBM 8050. Between live and neutral wires I drew a capacitor in red.
https://assets.chaos.social/media_attachments/files/112/480/373/623/582/994/original/5cf7bfc8566c406b.png
As a quick sketch: What Commodore did was to put the filter in front of the fuse and switch. Had it put the filter behind the fuse, the fuse would have blown, and no smoke... Or at least LESS smoke.
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