Upper Manual - Hammond M Series Service Manual

C j
)
Locate nine coded wires coming from busbars inside manual,
Tehse
are
found
at
right rear
of
manual.
Trace
this troup
of
wires
to
upper manual
preset tabs and unsolder. Note location and routing
as shown on wiring
diagram
and in console-
(k)
Take out four hex head machine screws from drawbar assembly.
(1)
Entire control panel, drawbar assembly, line
box,
pedal volume control
and
matching transformer
can
now rest
on generator cover.
(m)
Reinsert
two
bolts which held
the
control assembly
to
the
manual assembly,
(n)
Remove
two screws
which
pass through angle brackets into upper manual.
Co)
Prop
up
front
of
upper manual
so that its
terminal strip
is
accessible.
Be
careful when raising
and
lowering manual that
its
terminal strip
is
not damaged by rubbing lower manual keys-
(p)
Unsolder manual cable from terminal
strip. Lower manual
into
normal
position-
(q)
Carefully
lift
manual assembly
out of console.
t
TO REMOVE LOWER MANUAL
(Mi
M'2» M-3)
(a)
Remove music rack
by
unscrewing thumb
screw,
unhooking brace, and lifting
it
from console.
(b)
Remove music rack base by taking out
two
screws in upper manual
end blocks.
(c)
Remove dust cover over generator
by taking out
seven screws from edge
of
generator shelf and loosening four screws in cover just below upper
manual
assembly.
(d)
Loosen wood screw holding friction clip
of pedal volume control (Figure
3) to
top of
console,
Ce)
Remove upper manual mounting bolts
"A" and "B"
under keyboard.
(Figure
33)
(f)
Prop
up front
of
upper manual
as
far
as
possible.
Be
careful when raising
and lowering upper manual
that its
terminal strip
is not
damaged
by
rugging
lower manual keys.
(g)
Remove
two
hexagonal head mounting bolts from rear
end
of
lower manual
chassis mounting blocks.
(h)
Remove three screws
X, Y, Z
under keyboard (Figure
33).
(i)
Remove lower manual
end blocks by taking out screws
C,
D,
E,
and
F
under
keyboard
(Figure
33)
(j)
Unsolder manual cable wires from terminal
strip,
(k)
Lift manual
out
through front
of console, being careful not
to
damage
woodwork.
M'lOO
(a)
Remove screws holding four plastic clamps containing wires,
on rear of
upper manual.
(b)
Locate nine coded wires coming from busbars inside
of
lower manual- These
are found at right rear
of
manual. Trace this group
of
wires
to
lower
manual preset
tabs and unsolder.
Note location and routing
as
shown
on
wiring diagram and
in
console.
(c)
Prop upper manual from front, being careful
it
does not slip back.
(d)
Remove both lower manual
end
blocks, by removing
two screws through man-
ual frame and one screw through bracket
in
check block.
(e)
Remove lower manual terminal
cover, hedl by four screws under keyboard.
(f)
Remove
two
hex bolts which secure lower manual
to
case.
(g)
Loosen
(don't
r^tnove)
four
hex screws holding
front of lower manual
to
front rail of
case.
(h)
Lif
t
out lower
manual
25