Storck
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PROBLEM SOLVED:
I was about to give up, but as a last desperate attempt I removed the RAFOC-unit. I didn’t wanna do this at first since I didn’t wanna mess with the angle setting.
Anyway, after removing it, cleaning it, and dipping the two bearing balls in silicone oil it works like a charm!
Thank you so much for your suggestions and help Die Bogener and Dillen.
The search continues…
It works more or less reliably in vertical positions.
I found one video with the same problem, but he just replaced the focus unit.
I removed and cleaned all ribbon cable connections, also ohm-measured from the servo board to the solder points on the swing arm with good results.
I tried to remove the clamp – same problem.
It’s not a issue with the Disc drive motor. In service mode 3 the disc spins perfect and quietly regardless of how and where i push/move/angle the unit.
The noise must come from the swing arm/laser.
I just can’t see what possibly could be effected by pushing the back of the unit down, nothing seems to touch anything, and the swing arm moves without friction either way.
I just did some more troubleshooting,
The tracking force seems to be right, 1,19g (measured with a jewelers scale).
It randomly skips/repeats the groove, maybe every 20-30 seconds. I can’t see any obvious reason why and the tonearm seems parallel to the sensor arm the whole time, even when it skips.
New problem: Twice now it stops playing by itself and resets the arm and turns the beomaster to standby. First time after 3min and second time after 10 min.
