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 you for your manual It has the basic things to and i use the Oszi for Longer Time.
THX
Text excerpt from page 9 (click to view)
Defrosting
Regular defrosting is necessary to ensure efficient operation of the refrigerator. WE RECOMMEND YOU DEFROST THE FREEZER COMPARTMENT FORTNIGHTLY TO ENSURE EFFICIENT OPERATION. Frost will build in the frozen food compartment. This is due to moisture in the air which enters the refrigerator when the door is open and moisture from the stored food. Empty the frozen food compartment. Push the drip tray into the closed position. Push the defrosting button in the centre of the knob of the thermostat control. Leave the refrigerator door open. The frost will melt away and the defrost water will collect in the drip tray. Place a container beneath the tray, and remove the plastic bung. (Remember to replace the bung when the water has drained away.) Wipe out the interior of the frozen food compartment.
Changing the Light Bulb
Should the light fail to work you can change it as below: Disconnect the appliance from the electricity supply. Remove the lamp cover retaining screws, then take the lamp cover off in the direction of arrow and the bulb can be changed. (Type of the bulb: 230 V, 15 W, E 14 thread) After changing bulb replace the lamp cover, and retaining screws and reconnect the appliance to the electricity supply.
When the appliance is not in use
When the appliance is not in use for long periods disconnect from the electricity supply, empty all of the food and clean the appliance, leaving the door ajar to prevent unpleasant smells.