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 26 (click to view)
Bei Nischentiefen 550 werden die Leistungsdaten des Gerätes ebenfalls garantiert
Einbaukühlschrank Nische SINK 12/6 (1524 mm)
Ist der Netzstecker nach dem Aufstellen des Gerätes nicht mehr zugänglich, so ist installationsseitig eine Trennvorrichtung vorzusehen. Als Trennvorrichtung gelten Schalter mit einer Kontaktöffnung von mindestens 3 mm, dazu gehören LS-Schalter und Sicherungen sowie Schütze.
Lüftungsquerschnitt oben und unten min. 200 cm2 555 120
