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  • Jonathan Perkinjperkin
    Aug 29, 2026, 6:34 PM

    Today's fun: trying to fix my treadmill. I think I've narrowed it down to three options:

    * Take a punt on a new power board (~£200)
    * Buy a new treadmill
    * Diagnose possibly faulty 25V capacitors on a board containing scary 400V capacitors

    I'm not sure I like any of those options.

    Photograph of my treadmill's power circuitry.
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  • Dennis Boonedrb@h-net.social
    Aug 29, 2026, 11:11 PM

    @jperkin If the power supply is sanely designed, it has bleed resistors to discharge the caps, and just leaving it to sit a while will take care of that problem. (Deciding if you trust its sanity is left as an exercise...) Alternately, short the terminals of the caps through a resistor (at least 680k should keep power dissipation under a quarter watt) for a while.

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