33
July 2013
Moun ng & Connec ng the Electronic Components
Mount the Key Solenoid Rail
At
this
point,
the
rail
has
solenoid
assembly
pairs
corresponding
to
ac ve
keys
at
either
end
of
each
ac on
sec on
and
the
rail
has
been
previously
cut
to
length.
The
piano
is
standing
on
its
side;
all
of
the
electronics,
moun ng
hardware
and
trapwork
are
in
place
and
func
‐
oning.
Since
the
piano
is
res ng
on
its
le
side,
you
can
install
the
key
solenoid
rail
easily
by
res ng
the
bass
‐
most
(that
is,
the
lowest)
por on
of
the
rail
on
the
lowest
end
of
the
lowest
slot
and
then
bringing
the
treble
‐
most
part
of
the
solenoid
rail
into
the
higher
slots.
The
external
parts
of
the
rail
assembly
will
take
the
brunt
of
the
weight
of
the
key
solenoid
rail
and
spare
the
more
fragile
internal
structures.
You
can
use
a
heavy
‐
duty
screwdriver
in
‐
serted
between
the
bass
‐
most
aspect
of
the
lowest
slot
and
the
lowest
part
of
the
rail
assembly
as
a
simple
wedge
‐
lever
to
fi
ne
‐
tune
the
rail's
precise
alignment
within
the
slot
‐
system.
Look
inside
the
keyboard
compartment
to
ob
‐
serve
the
alignment
of
the
solenoid
plungers
alignment
with
their
respec ve
key
‐
tails.
If
these
are
not
sa sfactory,
you
will
have
to
remove
the
key
solenoid
rail
assembly
and
place
it
back
on
the
workbench
in
front
of
the
keyframe
‐
with
‐
keys
to
correct
any
misalignment.
Once
you
are
sa s
fi
ed
with
these
adjustments
and
the
rail
is
properly
aligned
within
the
keybed
slots,
take
a
spring
‐
loaded
center
punch
or
a
sharp
awl
and
carefully
mark
the
centers
of
the
four
corner
brackets,
in
the
larger
of
the
two
holes
in
each
bracket.
Next,
fasten
the
four
alignment
screws
with
the
large
washers.
This
will
allow
you
to
move
the
solenoid
rail
1/4"
in
all
direc ons
for
fi
ne
alignment.
NOTE:
The solenoid rail can be installed easily and more accurately when the piano is on its legs and the ac on is in
place. However, an assistant may be required to hold the rail while it is being fastened to the keybed for this step.
In
the
case
of
uneven
keytails,
a
lost
mo on
adjustment
can
be
made
for
each
individual
key.
Each
solenoid
has
a
5/8"
nylon
cap
at
the
bo om
of
the
solenoid.
With
the
5/8"
socket
wrench
turn
the
nylon
cap
clockwise
to
raise
the
plunger
p
or
counter
clockwise
to
lower
the
plunger
p.
Mount and Connect the Driver Boards
Now
it
is
me
to
turn
your
a en on
to
the
installa on
of
the
fi
ve
printed
circuit
driver
board
chassis
and
note
driver
boards.
There
have
been
fi
ve
Note
Driver
Moun ng
Brackets,
5
Lock
washers
&
5
Truss
head
screws
provided
in
the
kit.
These
brackets
are
mounted
in
the
center
hole
of
each
chassis.
The
lock
wash
‐
ers
are
to
be
placed
between
the
Note
Driver
Moun ng
Bracket
and
the
Note
driver
Chassis.
The
note
driver
board
chassis
will
be
mounted
to
the
Key
Sole
‐
noid
Locking
nuts.
Upon
placement
of
each
chassis
be
sure
that
all
solenoid
con
‐
nectors
will
reach
their
respec ve
header
pins
on
the
driver
board.
Each
16
‐
note
driver
board
has
16
pairs
of
header
pins,
one
header
pair
for
every
note.
Start
with
the
lowest
key
solenoid
plug
and
plug
it
onto
the
lowest
(that
is,
the
le
most)
header
pair.
The
next
key
solenoid
plug
should
be
the
opposite
wire
color
and
it
goes
onto
the
next
higher
header
pair.
Con nue
this
process
for
all
16
pair
‐
posi ons
on
each
board
(Note:
if
there
is
a
single
solenoid
at
a
break,
there
may
be
a
wire
color
change.).
At
this
point,
all
boards
have
been
mounted
and
connected
to
their
respec ve
key
solenoid.
Also,
all
electronic
compo
‐
nents,
solenoid
rail,
and
trap
work
have
been
mounted
to
the
piano.
Mount
toward
the
back
of
the
piano
Summary of Contents for PMII
Page 26: ...Installa on Procedure 26 July 2013 Installing the Steinway Sostenuto Assembly Order 70897 ...
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