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 9 (click to view)
GB
Maintenance
Defrosting
Bleeding part of the moisture of cooling chamber in form of frost and ice goes with the operation of the refrigerator. Thick frost and ice has an insulating effect, so it reduces cooling efficiency as the temperature increases, it needs more energy, at a certain thickness it does not allow the door of the frozen food compartment to open, possibly the door can be broken. We recommend to defrost the frozen food compartment once a week and when the frost is more than 4-5 mm. Empty the frozen food compartment. Put the drip tray into closed position, and switch off the appliance by removing plug from the mains socket. Defrosting usually takes several hours, at the end you can remove the collected water from the drip tray by placing another tray under it then pull out the plastic cork at the bottom. When the thaw water came out, replace the cork and plug the appliance to the mains socket.
Regular cleaning
It is recommended to wash the inside of the refrigerator in 3-4 weeks time. Household cleaner or soap must not be used. After you made it no-current wash the appliance using lukewarm water and wipe it. Clean the magnet door rubber profile with clean water. After cleaning plug the appliance to the mains socket. It is practical to clean and defrost the frozen food compartment at a time and when it is empty. Dust and dirt collected on the back of the refrigerator, condenser is recommended to be removed once or twice a year.
When the refrigerator is not in use
Break the circuit of the appliance. Remove foods from the refrigerator. Defrost and clean it as written before.
In case the appliance will not be used for a long time follow these steps:
Leave the door open to avoid a build up of air inside.
