Korg KR-55 - Vintage Analog Drum Machine SN 365079

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"Functionally everything works, except the Tom Tom/Conga circuit produces a slight hum in the audio. If you turn down the Tom volume, it removes the hum, and none of the rest of the sounds are affected.

Otherwise, all the knobs are working and not scratchy, the buttons perform their functions, and the switches and LEDs are all immediately responsive. The trigger output is also working..."