8 PianoDisc Installation Guide
228CFX - PianoCD - iQ
Step 1: Disassemble the Piano
A. Remove the music desk and the fallboard. On many pianos, the
fallboard can be easily removed by lifting it upward and outward. On others,
it is attached to cheek blocks at the ends of the keyboard. These blocks
must be removed first, usually by loosening the long screws beneath the
keybed.
B. Measure the key height. An important measurement must be taken here –
that of the key height for the particular piano on which you are working.
Carefully measure the distance from the top of the keybed to the top of the
(white) key covering. Record this measurement for later use. (Note: the
height of a black key is measured from the top of an adjacent white key.
This height is about ½” (13 mm). These measurements are also available
from piano manufactures and the Piano Technicians Guild.
Mark the location of the Keyframe on the keybed.
C. Remove the action. Be especially careful that your fingers do not push the
keys down while pulling out the action. The slightest pressure on a key will
lift its hammer, thereby causing the hammer to catch on the pinblock and
may cause damage when the action is pulled out of the piano. Place the
action on a table. If the piano arrives at your workshop already on its side,
you will need to tilt it in order to remove the action. New pianos shipped in a
crate, usually have the hammers tied down. If this is the case, the action
can be pulled out with the piano on its side.
D. Removal of the lid is optional. If left in place, secure it with a rubber inner
tube. If it is removed, put it in a safe location. To guard against losing the
hinge pins, tape each pin to its hinge.
E. Place the piano on its bass side on a carpeted piano board. With a soft
lead pencil, draw the outline of the right and left legs on the bottom of the
keybed. Remove the legs. With a permanent marker, number each leg and
the keybed point from which it came. These marks will be indispensable
later when some portions of the legs may need to be cut away.
F. Remove the pedal lyre and all trapwork. Remove the lyre and secure it in
a safe place. Remove all trapwork saving only the shift lever.
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