Remove the circlip around the centre of the turntable and lift off the turntable.
Remove the single screw holding the turntable idler and lift off the idler wheel.
Remove the two screws holding the larger cycle change wheel and lift it off. Note some force may be needed, its usually very tight. take care not to damage it.
Remove the single nut on the switch and lift off the cover.
Carefully unsolder the yellow wire
The green wire will also need to be removed but you have to unscrew it from the connector block underneath first.
Remove the operating and speed change knobs.
The operating knob pulls off, the speed change knob is held by a circlip.