User guide

Installaon Procedure
15
Modifying the Keyframe ‐ Grand...
If you are installing a QRS PNOscan II record system you should incorporate it’s installaon while modifying the pi‐
ano acon. The PNOscan II has it’s own installaon manual.
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TheKeyframewillprobablyrequiremodificaontoaccommodatetheKeySolenoidRailAssembly.Thekeytailsmust
protrudeoverthebackoftheaconframe,sotherearofthekeyframemustbecutaway.
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Toolsneede dforthischapter:pencil,
paper,woodchisel,straightedge,jigsaw, palmsander&sand paper, ulityknife,
woodglueandanassortmentofscrewdrivers.
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Atthis pointin theinstallaon, thepianois on itslegs,thefall board,keyslip, andcheek blockshavebeen removed,
andthelyreissllin
place.Thepiano hasbeenmeasuredtoverifythattheNoteRailAssemblywillfit.
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Measure the distance the acon shis when the le (una corda) pedal is pressed.(If a hammer li rail is installed,
measurethedistancethehammerslifora givenmovementofthe
sopedallyrelirod.) Measurethedistancethe
so shi (una corda) pedal li rod  travels when the pedal is depressed.Write these meas urements down for later
trapworkinstallaon.
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Removetheenregrandoruprightpianoaconfromthepianoandplaceitonaclean,
levelworkbench.Donotde‐
pressthekeyswhileslidingtheaconinoroutofthepiano,orbrokenhammerswillresult.
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Examinetherela onshipsofthekeytailstotherearedgeofthekeyframe.Eachkeytailmusthaveatleast1‐1/4"ex‐
posedbeyond
therearedgeofthekeyframe.Ifthisisnotthecase,thenthekeyframemustbemodified.Ifmodifica‐
onsarerequired,followthesesteps:
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IMPORTANT:Before removing the hammer acon from the key frame acon you must first measure the distance
from the boom of the key frame acon to the boom of the piano key. Next, depress the key and measure once
again, from the boom of the key frame acon to the boom of the key. Write these measurements down for later
use.
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Withascrewdriverremovethewoodenkey
stoprailfromthekeyframe.
Withascrewdriverremovethehammeraconfromthekeyframe,beingcertaintonoteanyscrewlengthdifferences
inthe8or10woodscrewsusedtosecuretheacontothekeyframe.Itisalways advisabletoputthesame
screwinto
thesamehole.
Verifythatthekeysareproperlynumberedbeforeremovingthem.Removeallkeysexceptkeynumbers5,84,andthe
breakkeys.Withapencil,mark1‐1/4"infromtheendsofthekeytailsontothekeyframe.Allowanaddional1/4"at
either
endofeachsecon.Withas traightedgetoguideyou,connectthemarks ineachsecon.Removaloftheback
railfeltmayberequiredbeforethisstep.(Figure1)
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Thebackrailfeltrestsbeneaththekeytails,andcanberemovedbyusingasharpu
lityknifeorinsomecasesa wood
chisel.Placetheremovedbackrailfelttothesideforfutureusewhenrelocangandre‐gluinginitsnewposion.