Kodak pagent 250s, Руководство пользователя

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Sound Optics
The sound track can be on either sur-
face of the film, depending upon what
type of film is being used. Therefore,
focusing the beam of light from the
EXCITER LAMP(Figure 18) is extremely
important; it is accomplished by moving
the sound focus lever. This helps you
obtain the maximum crispness of
sound.
Figure 7 illustrates the proper position
of the beam for each of the two types
of film: one threaded with the emulsion
side on top and away from the sound
optics (A) and the other with the
emulsion side on the bottom and toward
the sound optics (B).
KODAK
SUPER-40 Shutter
The Model 250S Projector is equipped
with the SUPER-40Shutter (Figure 8),
which provides 40 percent more screen
illumination in the 2-blade position than
it does in the 3-blade position.
Action of the SUPER-40Shutter
At the 3-blade position (for silent
speed), there are fifty-four
light inter-
ruptions per second. This position is
maintained
by spring tension. The
tension counteracts the centrifugal
force exerted by a weight that is linked
to the two movable blades.
When the speed selector is moved to
SOUND, the additional
centrifugal force
that results from the faster speed of
the shutter overc<?mes the spring
tension. The movable blades rotate on
their axis and overlap in a position
opposite the fixed blade. Now the
shutter will operate in the 2-blade
position with 40 percent more screen
illumination.
Sound Speed-If the SUPER-40Shutter
in the 2-blade position provides too
much illumination,
it can be locked in
the 3-blade position. When the projector
is operated at SOUND speed, the
shutter will automatically
shift (if
not
locked) from the 3-blade position to
the 2-blade position.
Silent Speed-The SUPER-40 Shutter
will remain in the 3-blade position if
the projector
is started in SI LENT
speed. If the projector is started in
SOUND speed and then shifted to
SI LENT speed, the shutter cannot
return to the 3-blade position unless
the motor is stopped momentarily.
10
~SOUNDTRACK
§SOUNDTRACK
EXCITER LAMP
SOUNDTRACK
SHUTTER LOCK
SOUND PICK-UP
SOUND OPTICS
FIGURE 7
FIXED BLADE MOVABLE BLADE
FIGURE 8
SUPER-40 Shutter
in
2-Blade
Position
SUPER-40 Shutter
in
3-Blade
Position