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 22 (click to view)
This unit requires very little attention, but you will be able to extend the life of the unit if you follow the instructions below.
â¢ Do not play the tapes with peeling labels; otherwise, they can damage the unit. â¢ Tighten tapes to remove slack since loose tape may become entangled with the mechanism. â¢ Do not leave a cassette in the cassette compartment after use, as the tape may become slack. The function below is also provided to ensure the longer life of this unit.
To clean the heads
Ignition key-off Release/Ignition key-on play
â¢ When you turn off the ignition key with a cassette in the compartment, the unit automatically releases the tape from its head. â¢ When you turn on the ignition key with a cassette in the compartment, playback automatically starts.
â¢ Clean the heads after every 10 hours of use using a wet-type head cleaning tape (available at an audio store). When the head becomes dirty, you may realize the following symptoms: â Sound quality is reduced. â Sound level decreases. â Sound drops out. â¢ Do not play dirty or dusty tapes. â¢ Do not touch the highly-polished head with any metallic or magnetic tools.
To keep the tape clean
â¢ Always store the tapes to their storage cases after use. â¢ Do not store tapes in the following places: â Subject to direct sunlight â With high humidity â At extremely hot temperatures