The F, E, and D keys need to close the F# key cup located directly above the F. On a modern saxophone like a Chateaux you will find small adjusting screws in the "back bar" attached to the F# that allows the F to be regulated to close the F# completely. The cause of the problem can either be the cork or other buffering material on the top of the foot of the F key has fallen off, or the adjustment has just gone out of "regulation".
To adjust, take a small screwdriver the exact size of the head of the screw in the back bar and turn it clockwise until there is a positive closing of the F# key cup. Be careful not to go too far or the F key itself will not close. It is always a good idea to do these types of regulation adjustments with a leak light for more accuracy.
To adjust, take a small screwdriver the exact size of the head of the screw in the back bar and turn it clockwise until there is a positive closing of the F# key cup. Be careful not to go too far or the F key itself will not close. It is always a good idea to do these types of regulation adjustments with a leak light for more accuracy.
