Re: Sony Tapecorder TC-260
Don't worry too much about the grease. A light lithium will do - general car grease is too thick unless used for where a lever travels along a metal surface. 3-in-1 oil is handy for pivots, and a bottle of sewing machine oil for bearings is invaluable.
I don't THINK there's a screw you're missing. Often placing two pieces of insulated wire below the knob, one each side of the spindle, allows you to lift it up with even force so no damage can happen to the knob of the trim.
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