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)
THE GRILL
USES OF THE GRILL
CAUTION - ACCESSIBLE PARTS MAY BECOME HOT WHEN THE GRILL IS IN USE. CHILDREN SHOULD BE KEPT AWAY.
SELECTING THE GRILL
Ensure the handle is correctly located. It is grilling.
THE GRILL PAN AND HANDLE
The grill pan is supplied with a removable handle. To insert the handle, press the button on the handle with the thumb and pivot the handle slightly upwards inserting the lip into widest part of the bracket. Move the handle towards the left, lower into position and release the button. Ensure the handle is positively located. When removing the handle, press the button on the handle with the thumb and pivot the handle slightly upwards and towards the right to remove from the bracket. Ensure your hand is protected when removing the grill pan handle as the grill element can become very hot. ALWAYS REMOVE THE GRILL PAN HANDLE DURING GRILLING.
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To operate the grill open the grill door and turn the grill control in either direction. The highest number represents the hottest setting and the lowest the coolest setting. Setting 5 represents the grill on Full. At lower settings the grill may turn on and off over time and you may prefer to use these settings for keeping food warm.
THINGS TO NOTE
THE GRILL DOOR MUST BE LEFT OPEN DURING GRILLING. Closing the grill door will cut OFF the power to the grill element preventing incorrect use. Some smoke from fat splashes may be evident as the grill cleans itself.