Question about Sony SA-WMSP1 Subwoofer Speaker
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Posted on Jan 02, 2017
If it hums on the audio side on all channels it might be the 60hz mains hum getting through. This is caused by the failure of the large Electrolytic capacitors in the power supply.
Another cause of hum (not in the audio) is the transformer. Also parts that hum should be replaced. If you can't pin down a huming part IE where it is. Then use a drinking straw as a stethoscope, by putting one end in your ear and the other over the PC board.
Posted on Feb 16, 2010
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