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 17 (click to view)
Door Reversal
1. Disconnect the appliance from the electricity supply. 2. Gently lay the fridge/freezer on its back with the top held away from the floor by 5-8 cm (2-3 inches) of packaging. 3. Prise out the two white screw covers from the ventilation grille at the bottom of the appliance. 4. Remove the two securing screws and remove the grille. 5. Unscrew the bottom hinge. 6. Remove the door by releasing it from the middle hinge. 7. Unscrew the middle hinge. 8. Slide out the fridge door from the pin, unscrew the pin and then screw it into the hinge blade provided on the opposite side. 9. Refit the fridge door on the opposite side and replace the middle hinge to the left hand side. 10. Replace the door and bottom hinge on the opposite side. 11. Remove the plug from the ventilation grille in the direction of the arrow (1) and insert it on the opposite side (2). 12. Refit the ventilation grille. Secure with the two screws and push in the screw covers. 13. Return the appliance to its upright position. Important After completion of the door reversing operation, check that the door gasket adheres to the cabinet. If the ambient temperature is cold (i.e. in Winter), the gasket may not fit perfectly to the cabinet. In that case, wait for the natural fitting of the gasket or accelerate this process by heating the part involved with a normal hairdryer on a low setting.