Installing The So -Shi Lever - QRS Music Technologies QRS PNO3 Installation Manual

Installa on Procedure
Installing the So ‐Shi Lever
The So Shi (una corda) pedal mechanism usually includes a long, cast‐iron bell crank lever whose short arm pro‐
trudes though the keybed to engage a groove cut in the bo om of the keyframe somewhere beneath the treble sec‐
on. The shi pedal in this configura on does not have to pass through the solenoid rail and, therefore, may o en be
le untouched. However, on some pianos you may have to move the so shi toward the front of the piano to accom‐
modate for the width of the rail. For the pianos that need modifica on, brackets have been included in the kit for easy
readjustment. It is a good idea to leave one of the original wooden blocks a aching the so shi lever to the key
bed, and only use one of the brackets supplied. This will make adjus ng the So Shi lever much easier. The brack‐
ets can be a ached to the keybed with four #10 x 1" moun ng screws. The pedal must shi the ac on the same dis‐
tance as before with the same pedal movement. Refer to the measurements taken when the trapwork was removed to
verify that this behavior has been retained (See "Modify the Piano Ac on" sec on).
Measuring from the front edge of the slot there should be 2‐1/4 inches to the front edge of the so ‐shi hole.
Slot
2-1/4"
Lyre Brace
21