12-03-2015, 05:02 PM
I can now see the idea behind the plastic cogs. Pushing the cassette forwards activates the switch. If you then push the cassette downwards this brings that friction pulley into contact with its driver pulley. Turning the plastic cog slowly by hand against spring pressure will finally result in a clicking noise and the cassette locks in. To unlock, you need to rotate again in the same direction just a bit and the lock snaps out and the cassette is free. The spring seems a bit clumsy to me.
How that plays out with regard to the motor I'm not yet sure. The motor is supposed to do the same thing as I did with my fingers but I can see the drive isn't very good at all. A bit of play and wear in the teeth seems to be one obstacle. The motor cog only just meshes with the other cog and also I'll be forced to re-tyre one of the pulleys.
The transistor PN junctions also seemed suspect.
Plenty of work to do yet.
The player that has the non-working motor is in far better condition and I imagine a new motor will be as far as I'll need to go in that case.
How that plays out with regard to the motor I'm not yet sure. The motor is supposed to do the same thing as I did with my fingers but I can see the drive isn't very good at all. A bit of play and wear in the teeth seems to be one obstacle. The motor cog only just meshes with the other cog and also I'll be forced to re-tyre one of the pulleys.
The transistor PN junctions also seemed suspect.
Plenty of work to do yet.
The player that has the non-working motor is in far better condition and I imagine a new motor will be as far as I'll need to go in that case.
