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P N O s c a n
P N O s c a n
P N O s c a n
I I
I I
I I
I n s t a l l a t i o n M a n u a l
I n s t a l l a t i o n M a n u a l
I n s t a l l a t i o n M a n u a l
QRS Music Technologies, Inc. / Technical Support - 800-247-6557 / www.qrsmusic.com
Manual Rev. 1.18
Once the height of the scan rail assembly is fixed you will need to dress the interconnecting cables.
Check that the three wave cables used to connect the Key Scan Circuit Boards lay flat against the boards
and don’t touch any keys that are depressed.
See Figure 19.
1. Use blunt nose tweezers to squeeze the cable to lay flat against the board. Squeeze in the middle of a
wave will keep the cable straight. Once the cables are properly tightened and adjusted they should be
laying flat against the circuit board. See
Figure 19
.
If you have problems getting the cables to lay completely flat you can use a thin piece of tape or a single
drop of super glue under one wave of the cable near the middle. As a last resort you can unplug the
wave cables and stretch them to remove the waves. Reconnect and fold the cables so they lay flat
against the boards. Tape or glue if necessary.
Tap on the key frame and listen for noise. from the wave cables against the boards and for the boards
rattling within the metal tracks.
1. For optimum performance, darken the sides of all keys to reduce light reflections. Centered on the line
you scribed on the keys, create a 1" long x 1/2" high fill using a extra large permanent marker or paint
pen. We suggest a jumbo size magic marker. Use care not to get paint on the bottom of the keys and
not to color too high up the key as to make it viable when adjacent keys are depressed.
Figure 21
.
Be sure to remove and color the sides of the keys originally left on the key frame.
2. With the key sensor rail adjusted and secured place the piano keys back onto the key frame.
H ] Dressing the Key Scan Assembly Cables
I ] Preparing the Keys
3. With all keys darkened and reinstalled onto the frame, the action
stack can be placed back on the key frame. Place the key/action
assembly back into the piano case.
2.
Prepare the 12" cable [20” for upright pianos] exiting the treble end of the Key Scan Assembly with an
immediate 90 deg fold pointing frontward and
then wrapping down and around the front edge of
the track. Continue routing under the track
followed by an immediate 90 deg bend pointing
right. Once the cable is positioned use a couple
pieces of tape to hold in place. This orients the
cable in the proper direction and keeps the cable
clear of key's and sensors.
See Figure 20.
Figure 20
Figure 21
Figure 19
Fold or Pinch
