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 6 (click to view)
insert in the base of the plug. In no circumstances must the plug be used without a correct fuse cover/carrier fitted. If the plug supplied on the mains lead is not suitable for the socket in your home, it should be cut off and disposed of safely, or destroyed, to avoid any possible shock hazard resulting from the plug being inserted into a 13 amp socket elsewhere in the house. A suitable replacement plug should then be fitted as given below. General guide to fitting any plug Ensure the lengths of wire inside the plug are prepared correctly. Connections should be firmly made after all conductor strands are entered into the terminal posts. When preparing the cable ends take care not to damage the outer sheath, or the insulation surrounding the inner conductors. Tighten all screws. Replace the top cover of the plug and secure. Other versions Your refrigerator has a 3-wire mains lead which is intended for connection to a 3-pin plug and a properly earthed socket outlet. IMPORTANT: The wires in the mains lead of this appliance are coloured in accordance with the following code: GREEN-AND-YELLOW: EARTH BLUE: NEUTRAL BROWN: LIVE As the colours of the wires in the mains lead may not correspond with the coloured markings identifiying the terminals in your plug, proceed as follows: the wire which is coloured GREENAND-YELLOW must be connected to the terminal in the plug which is marked with the letter E or by the earth symbol or coloured green or green-and-yellow. The wire which is coloured BLUE must be connected to the terminal which is marked with the letter N or coloured black. The wire which is coloured BROWN must be connected to the terminal which is marked with the letter L or coloured red. WARNING - THIS APPLIANCE MUST BE EARTHED! If a 13 amps (B.S. 1363) fused-plug is used, it should be fitted with a 3 amp fuse. In other cases, the circuit to which the refrigerator is connected should be fitted with a 5 amp fuse. To turn on (Fig. 1) - 3-way-switch (D) should be in position 230V.