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5.14
Upper
pin
is held
by a set
through
the
casting.
Loosen
set
screw
screw
to allow
lens bracket
assembly
to
slide.
With
projector
operating,
speaker
plugged
in and volume
at approximately
"10:00
o'clock",
slide
assembly
to a
position
where
no sound
is heard.
Too
far in one
direction
will
produce
a
low
tone
; too
far in other
direction
will
produce
a high
tone.
After
proper
position
is
reached,
tighten
set
screw
and
seal
with
paint
or
sealing
wax.
SOUND DRUM AND FLYWHEEL
ASSEMBLY
SOUND
DRUM
ASSY
OB-608Z
312-41011
\
.—— o
313-41301 (assy)
312-41041
x _P-3512
xP-3510
he Giese
ST-41031
/
312-41051
ST-41061
£
D
XT-40085
Function
:
The
sound
drum
shaft
is mounted
in the
shaft
housing with ball bearings.
The set
collar
should
be installed
with
minimum
clearance.
Shaft
must
not bind
in rotation.
S.15
18
Flywheel
is held
on
shaft
with
plate
spring
ST-41061
and
screw.
This
arra-
ngement
allows
the
flywheel
to
slip
on sound
drum
shaft
at the moment
the
4
film is started
in either
"FORWARD"
or "REVERSE"
direction.
This assures
minimum
film damage.
Torque
required
to
turn
flywheel
on
shaft
in
forward
direction
should
be approx.
100-110
cent.grams,
or
1.5
in
oz.
Check
:
To check
torque,
use
convenient
scale
and
string
which
may
be
secured
to
outer
circumference
of flywheel
with
scotch
tape.
Install
film
in projector
and
turn
switch
to "FORWARD".
With
projector
operating,
string
atta-
ched
to
flywheel
and
scale,
a reading
of approx,
20-25
grams(1
ounce)
should
be observed.
3112-41051
a
XT-40088 |
ST-41061
Adjustment
:
To adjust,
remove
spring
and
bend
to
provide
correct
tension.
Be sure
the
edge
of spring
does
not
dig
into
the
surface
of flywheel.
Replace
spring
if necessary.
Insufficient
tension
results
in longer
delay
of
sound
sta-
bilization.
REVERSE RUBBER ROLLER ST-41201
Function
:
When projector
is operated
in "REVERSE",
roller
ST-41201
is
carried
toward
set
collar
by the main
drive
belt.
The
rubber
roller
rotates
the
sound
drum
and
pulls
the
film
from
No.2
sp-
rocket.
This
maintains
the
lower
loop
under
the
film
gate.
When projector
is operated
in "FORWARD",
roller
is
carried
away
from
set
collar,
thus
allowing
it
to
rotate
freely.
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