I have found a Sony CDP-591 CD player that doesn't work properly. If I insert a CD the player will do nothing - as in CD not spinning and making no sounds - for 5 - 10 minutes, before suddenly starting to play. When it plays it sounds fine.
Other symptoms are that the drawer will open fine but it needs to be pushed halfway in before a button press will close it. It is also very sensitive while playing - lightly tapping the table will make it skip 30 seconds or so.
Cannot find other people with similar problems.
Other symptoms are that the drawer will open fine but it needs to be pushed halfway in before a button press will close it. It is also very sensitive while playing - lightly tapping the table will make it skip 30 seconds or so.
Cannot find other people with similar problems.
Try re-seating the connectors. Check any belts, etc.
Does it seem to be thermally related - does it do this after running for a while, and then inserting a new CD?
Does it seem to be thermally related - does it do this after running for a while, and then inserting a new CD?
If I change CD's or even just push a CD out and insert again it will also take some minutes of doing nothing.
Try and fix the drawer first. Micro switch issues are common. It is also worth checking for dries around any regulators and 'heavy' PSU parts where the solder might not be so good.
https://www.diyaudio.com/community/threads/sony-cdp790-and-kss240-restoration-project.226288/
https://www.diyaudio.com/community/threads/sony-cdp790-and-kss240-restoration-project.226288/
See if the CD would start spinning if you give it a little push with your finger. Sometimes the commutator gets shorted from many years of use, and the rotor's initial torque capability drops substantially - hence the struggle to break the equilibrium.
Take the spindle motor out, put it in a jar with methylated spirits, close it... and then shake shake shake (but not stir 🙂), and see if that works...
Or, take a syringe with a needle, fill it up with the methylated spirits, and inject the methylated spirits into the holes close to the rotor commutator.... the above 007 thing works much better, though.
Also, if there's a cold joint somewhere, the current would drop substantially... the heat would be generated... After some time the heat builds up, the crack expands and allows for sufficient current to start flowing again.... but I think you may have the case of insufficient starting torque due to shooting commutator contacts.
Good luck
Take the spindle motor out, put it in a jar with methylated spirits, close it... and then shake shake shake (but not stir 🙂), and see if that works...
Or, take a syringe with a needle, fill it up with the methylated spirits, and inject the methylated spirits into the holes close to the rotor commutator.... the above 007 thing works much better, though.
Also, if there's a cold joint somewhere, the current would drop substantially... the heat would be generated... After some time the heat builds up, the crack expands and allows for sufficient current to start flowing again.... but I think you may have the case of insufficient starting torque due to shooting commutator contacts.
Good luck
