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RE: Fried capacitors

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Lytic caps will blow up with wrong polarity DC, which is probably what you did in your experiment. These are storage caps, and the little blue film caps are indeed bypass caps for them. Since the lytics are toast, the little film caps, which are NOT polarized and thus not subject to explosion, are all that are now storing the energy that the lytics are supposed to store and provide. Obviously, it's much lower capacitance, but evidently enough to power the circuit. There may be a lack of dynamics or bass energy due to being underpowered, depending on the load on the outputs.

Replace the lytics with same or higher voltage, same or slightly higher capacitance. Nichicon KZ is suitable, as is Panasonic FM. Use what fits. You need to know overall diameter, height, lead spacing. Observe polarity of the originals and duplicate it.

Recheck the test umbilical for proper polarity before reconnecting, or use one that you know is good.

Peace,
Tom E


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Topic - Fried capacitors - Duster 12:06:22 12/12/17 ( 20)