Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
2. Sollevate il coperchio e togliete il pezzo in polistirolo e il pezzo in plastica che blocca il cesto. Chiudete il coperchio.
3. Svitare e sfilare le due rondelle (A) poste sul lato posteriore, aiutandosi con una chiave.
A
C45Q001
B
4. Le aperture ora visibili devono essere chiuse con tappi (B) contenuti nell�astuccio inserito alla macchina (fig. 4), non dimenticando di premere sulla capsula centrale.