I have "collected" from the recycle centre this mid size CD player Sony CDP-M33. Considering where I found it, it is in excellent cosmetic conditions and also internally is very clean. It has problems though and it is driving me crazy: it randomly skips back and forth in the first three tracks of many CD's.
The pick-up is a classic KSS-240A (still Sony original) but the control loops are "digital" and do the auto calibration. I have thoroughly cleaned the sledge rails, both the steel rod and the white plastic rail; I have cleaned the sledge motor and gears and the pick-up slides on the rails smoothly and with minimal effort. I tried replacing the pick-up with a new replica, but I always get the same result, it skips in the first 10 minutes of playback; after that it plays flawlessly until the outer edge of the disc.
All electrolytic caps are Elna, but none appears to have the slightest hint of leakage; the control board does not have caps at all.
What could be the problem ? I know this player is worth nothing, it is just fun playing with it.
The pick-up is a classic KSS-240A (still Sony original) but the control loops are "digital" and do the auto calibration. I have thoroughly cleaned the sledge rails, both the steel rod and the white plastic rail; I have cleaned the sledge motor and gears and the pick-up slides on the rails smoothly and with minimal effort. I tried replacing the pick-up with a new replica, but I always get the same result, it skips in the first 10 minutes of playback; after that it plays flawlessly until the outer edge of the disc.
All electrolytic caps are Elna, but none appears to have the slightest hint of leakage; the control board does not have caps at all.
What could be the problem ? I know this player is worth nothing, it is just fun playing with it.
the spindle motor appears to be fine, I have added a drop of watch oil in the bearing and it is very silent and smooth. Moreover the skipping occurs typically after 3 minutes of playback, not at the very beginning.
Just to be on the safe side I have re-soldered all voltage regulators and the socket for the pickup cable on the control board.
I will keep it monitored and see if that *magically* fixed the problem
thanks !
Just to be on the safe side I have re-soldered all voltage regulators and the socket for the pickup cable on the control board.
I will keep it monitored and see if that *magically* fixed the problem
thanks !
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