Yamaha PSR-F50 Service Manual page 8

PSR-F50
5. Disassembling Keyboard Assembly
(Time required: About 13 minutes)
5-1 Remove the center panel assembly. (See procedure 1.)
5-2 Remove the side panel assembly L, R. (See procedure 3.)
5-3 White Keys and Black Keys
5-3-1 White and black keys for one octave unit are integrated
as a set. There are fi ve sets in total. Only the C6 white
key, unlike the other keys, is not integrated in a set. (Fig.4)
5-3-2 To remove a set, remove the two (2) each screws marked
[110A]. The white and black keys in the set can then be
removed. (Fig.4)
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When removing, unfasten the two (2) hooks at the back
of the black keys upward, and lift the white and black
keys while pulling them toward you a little. (Photo.1)
5-3-3 To remove the white key C6, remove the screw marked
[110B], unhook as described in Procedure 5-3-2, and pull
out toward you. (Fig.4)
* When all white and black keys were removed, fi rst attach the
white and black keys from C3 to B3 aligning them with the
boss, and then attach the remaining white and black keys.
(Fig.4)
Fig.4
Photo.1