Hi.
To smack the camera is an interesting solution. But some camera can be damaged, if you smack them too hard. I had the same problem whit my Sony CCD-TR840E. I try the “smack method” but its only work for few minutes. I find another solution, since a smack help a little I suggest It must be something loose in the camera. I take out the cassette, powered off the camera, and touch very carefully a little white cylindered wheel away from the black wheel. I also open up “Bend out” the slides for the cassettes, so the cassettes smock smoothly into the camera. All irritating sound disappears and the camera is working very silent without any fault.
Good luck!
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