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 13 (click to view)
Water hose mesh filter
Check and clean periodically. For machines with a straight water supply hose �A� 1.Turn off the tap. 2.Unscrew the hose from the tap. 3.Clean the internal filter. 4.Screw the supply hose back onto the tap. 5.Unscrew the hose from the machine. 6. Remove the filter from the washing machine with pliers and clean it. 7.Replace the filter and screw the hose connection back on to the machine. 8.Turn on the tap and ensure that the connections are completely water-tight. For machines with Water Stop hose �B� 1.Turn off the tap. 2.Unscrew the hose from the tap. 3.Clean the filter. 4.Screw the Water Stop hose back onto the tap. 5.Turn on the tap and ensure that the connection is completely water-tight.