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.
Press the R button Note: Press the SURROUND button to directly turn the surround effect On and Off. (see page 11) Bass, Treble and Surround settings are memorized separately for each Sound mode (Normal, Auto).
Helpful Hint (
N
/
Normalise
Normalisation)
While the �Sound� menu is displayed, if either the N button on the remote control is pressed at any time or the (ACTION button) is pressed during �Normalise�, then all adjustment values are returned to the factory settings.
Mute
Useful when answering the phone or receiving unexpected visitors.
Press this button to mute the sound. Press again to reactivate sound. Sound is also reactivated when power is turned off or volume level is changed.