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.
Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
Text excerpt from page 15 (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
Please note: EOD980gr screening will differ from that show in the diagram.
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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 number the coolest setting. Setting 6 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.
Slide the handle to the left and over the central bump on the grill pan.
THINGS TO NOTE
THE GRILL DOOR MUST BE LEFT OPEN DURING GRILLING. Closing the grill door will automatically cut OFF the power to the grill element after a period of time preventing incorrect use. Some smoke from fat splashes may be evident as the grill cleans itself.
Ensure the handle is correctly located. It is not necessary to remove the grill pan handle during grilling.
THE GRILL PAN AND HANDLE
The grill pan is supplied with a removable handle. To attach the handle, place the wirework under the cut out in the pan so that the metal hooks over the top of the grill pan.
To remove the handle, slide the handle to the right and lift the handle away from the cut out on the grill pan.
Place the grill pan on the shelf so that the pan is positioned centrally beneath the grill.