Installa On Procedures; Upright Piano Installa On - Recommenda Ons - QRS Music Technologies QRS PNO3 Installation Manual

Installa on Procedure
Upright Piano Installa on ‐ Recommenda ons...
This sec on outlines the differences between the installa on of the QRS kit in an upright piano versus a grand. The
differences are rela vely small, and an installer familiar with the installa on procedure for a grand piano should have no
difficulty installing the system in an upright. The differences are as follows:
On a grand piano the slot cut into the keybed is determined by the loca on of the keytails. The posi on of the ac on
determines where to cut the slot and you mount the rail to the bo om of the keybed accordingly. On an upright piano,
with limited space for the components, the slot loca on is determined the posi on of the key solenoid rail assembly.
Begin by determining how close can you mount the rail to the plate and s ll have the plungers strike the bo om of the
keys. And remember, you want the plungers as close to the back‐end of the keys as possible.
On a grand piano we usually cut one long slot in the keybed for the key solenoid rail. We want to cut three slots in the
upright to keep the wood at the break‐points to support the ac on bracket studs. We suggest adding a piece of angle‐
iron to support the keybed. This is mounted at the back side of the balance rail.
Since the mechanism is hidden from view, a key solenoid rail cover is not necessary.
Sostenuto and Sustain Pedal Trapwork aren't used on the upright. We do recommend installing the pedal solenoid for
be er playback. The sustain pedal mechanism on an upright is very different from that of a grand piano and requires the
installer to fabricate a moun ng system specific to the individual piano.
As of August, 2013 QRS includes the Ver cal Pedal Solenoid Li er assembly in the upright kit.
In most cases, the back rail and back rail cloth must be relocated toward the back edge of the piano keys.
IMPORTANT: Care must be taken to first measure the key dip at the back end of the keys before any work begins. Sec‐
ondly, a er the back rail has been relocated, you must ensure that the key dip is exactly the same as it was before
star ng. If it is not, you must either trim the back rail or shim it up to its original measurement.
Special upright driver board moun ng brackets are required for moun ng the driver boards to the solenoid rail. These
brackets are longer which allow the driver boards to hang below the solenoid rail to save space. Since the upright key‐
bed is thinner than a grand, longer key solenoid rail moun ng brackets are supplied with the upright kit.
SPECIAL NOTE: The driver boards are usually oriented differently on an upright which will change the order that the
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keys play. You can reverse the key order by selec ng "Invert Keybed" in the "Playback Parameters" sec on of PNO .
All of the electronic components are mounted inside the piano in a place convenient for the installer.
Smaller speakers are supplied with the upright kit.
You may need to cut a 1" hole directly through the soundboard of the piano towards the bo om of the piano at the end
where the power supply is usually mounted. This will allow the main power plug to easily be plugged into a wall outlet.
This hole will not affect the sound of the piano in any way.
Alignment of the solenoid rail is made by laying a wooden s ck at the top back edge of the keys and carefully transfer‐
ring the centerline of each key onto the wooden s ck. This s ck will become your guide to posi on the key solenoids on
the rail. Remember that a standard installa on is 80 notes. Start with note #5 and end with note #84 and slide each pair
of solenoids in direct alignment with your marks on the alignment s ck and ghten the 11/32" nuts.
We've included some pictures on the next few pages to help you with the upright piano installa on.
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