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  1. S

    Tek 2235A Scope - Lost Vertical after cap replacement

    UPDATE: After hours of studying the circuitry, verifying power supply function, and very confusing continuity testing, I isolated the short to a trace in the volts/div switching circuitry on the attenuator board. I didn't see any issues until my flashlight caught a glint. It looked like a fine...
  2. S

    Tek 2235A Scope - Lost Vertical after cap replacement

    Thanks for the tips, I will see if it helps. Start simple, right? I have some Deoxit
  3. S

    Tek 2235A Scope - Lost Vertical after cap replacement

    Thank you for responding. I checked the suspicious diode which showed it was not shorted, and it's forward voltage drop was correct and consistent with the other untouched diode (500mV). I used my kill-a-watt to check the current draw from the mains, which showed about 0.41A at 124VAC -- well...
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    Tek 2235A Scope - Lost Vertical after cap replacement

    I have this scope for my interest in restoring vintage audio equipment. The mains mylar safety capacitor exploded while I was using it. Little flakes everywhere. The trace wasn't affected, but I shut it off as fast as I could. Which wasn't super fast because a piece of the debris blocked the...
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