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.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 50 (click to view)
,QVHUW WKH FOHDQLQJ VKHHW
z Remove the two pieces of tape from the sheet. z Insert the sheet with the sticky side out (toward you) and down
(going into the sheet feeder). z Adjust the paper guide to the edge of the cleaning sheet.
)HHG WKH FOHDQLQJ VKHHW
z Turn off the printer by pressing the POWER button. z Press and hold the FF and PRINT MODE buttons and press the
POWER button until the printer beeps. z The printer advances the cleaning sheet and starts cleaning. z The printer feeds the sheet and then ejects it. z Use a cleaning sheet once only. Chapter 3