How to repair the voice coil degumming of horn unit?

The voice coil can be used normally as long as it does not fall off the paper basin as a whole.

1 Apply the dust cap with rosin water and connect it.

Insert a piece of paper into the voice coil so that the magnetic axes are equally spaced apart.

3. Stick the damaged part with varnish, and be careful that the varnish cannot drip into the voice coil in the magnetic shaft; Dry it, stick it on and remove the note.

4 Audition, after normal, stick the dust cap.