Following this guides shows you how to remove the cassette lid from the device. Removing the cassette lid allows you to install a new one and enables you to remove the mechanism deck
Using a spudger, apply pressure towards the back corner of the cassette compartment to the plastic tab directly behind the gold cone.
Pushing the tab allows the hinge to be separated from the body of the device.
Next, use a plastic opening tool to pull the metal latch towards the speaker.
The latch should be clear of the slot in the cassette lid.
Carefully lift the cassette lid, making sure the tab and latch are free from connection.