The owner's manual/operating instructions that I purchased was the original factory document and it was in at least three and maybe more languages. I no longer have it because I sold the tape recorder and included the owner's manual/operating instructions and a service/repair manual that I bought on ebay for the new owner.
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.
Great price, Quick delivery, the document was very usefull A+++++++++++++++
Text excerpt from page 11 (click to view)
Possibilità di inserimento
Su mobile base con portina Nella costruzione del mobile è necessario vengano presi adeguati accorgimenti in modo da evitare possibili contatti con la scatola del piano surriscaldata durante il funzionamento dello stesso. La soluzione consigliata per evitare tale inconveniente è illustrata nella Figura 15. Il pannello sotto il piano dovrà essere facilmente rimovibile per consentire, in caso di intervento dell'assistenza tecnica, il bloccaggio e lo sbloccaggio del piano. Fig. 15
480