56 PianoDisc Installation Guide
228CFX - PianoCD - iQ
Step 33: Action installation
The design of the PianoDisc spring loaded solenoids requires the keys to be
depressed, or the action to be lifted as the action is moved into position. This is
necessary to ensure that the action clears the rubber tips of the plungers,
thereby preventing damage to the plunger stems.
It is also necessary to depress the sustain pedal to allow the key tails to clear
the underlever assembly. The key slip can be used to depress the keys.
NOTE: For the current key solenoid design (no spring) it is not necessary to
raise the back of the keys to clear the solenoid. The springless key solenoids
were released in Jan. 2005.
Step 34: Key solenoid rail adjustment
NOTE: Before raising the solenoid rails to their final position, check the
hammer line and make any necessary adjustments.
A. The proper height of the rails is achieved when the rail is as high as
possible without lifting the hammers. The total travel of the solenoid
is.460 (12 mm) and most grand piano keys travel about 3/8” to 7/16” (9.5
to11.5 mm). The proper rail adjustment is essential in order for the piano to
play correctly. Adjust the rail height by moving the 5/16” nuts on the hanger
studs.
B. Make a final check of the alignment of the plunger tips relative to the keys. If
the rail needs to be moved in order to center the plungers to the keys,
remove the solenoid rail, loosen the brackets and make the adjustment.
(See Fig. 38 – 39)
NOTE: To check the key to plunger tip alignment from the top, side the
action out 1” and look thru the strings to observe the alignment.
Figure 38
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