If you are lucky, this part may be skipped.

As you lift the frame you may fine that the stainless steel rods that act as axles/pivots to the levers and cogs come with it. Take note, you need to reverse this late, and the jigsaw puzzle is easier if you have a reference.

You will need to pay careful attention to the pieces, in particular the hooked "cam follower" lever (green rectangle) which you'll need to ensure is correctly positioned once the spring (see next step) has been reattached.

Once you can get to the small lever shown with the yellow circle, you are ready to start the actual repair.