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 5 (click to view)
� When the hood is used in its extractor function, the following rules must be followed to obtain optimal operation: - short and straight outlet ducting - keep bends in outlet ducting to a minimum - never install the ducts with an acute angle, they must always follow a gentle curve. - keep the duct as large as possible (preferably the same diameter as the outlet hole). � Failure to observe these basic instructions will drastically reduce the performance and increase the noise levels of the extractor hood.
