Kodak FS-10-N Operation & Maintenance Manual page 8

B
A
SOUND
Focusing the beam from the exciter lamp on the sound
track of the film is extremely important and is accomplished
by moving the FIDELITY lever up or down. The position of
the sound track on the film base will vary depending upon
whether you are using (a) l o-rnrn sound-on-film originals,
l o-rnm prints from 35·mm originals, or (b) l o-rnrn duplicates
of l o-mrn originals, block-end-white or Kodachrome.
The sketches illustrate the position of the beam upon the
two tY,f>esof_film: ~ne threaded with emulsion side of film
toward the projector lens (a), and the other with emulsion
side away from the projection lens (b).
Regardless of which type film you are using, focusing is
extremely simple. Turn the TONE control knob clock-
wise as far as it will go; then move the FIDELITY lever
up or down to the position giving the most complete range
of sound. When the bearp is sharply focused on the sound
track, you will obtain brilliant reproduction of music, and
speech will be crisp and distinct. After the fidelity lever
has been set, adjust the TONE and VOLUME controls in
the conventional manner.
REWINDING
At the completion of projection, turn the control switch
to OFF and pull out on the
REWIND LEVER.
Attach the film to the upper reel by inserting the end of
the film into the reel slot. Give the reel a few turns toward
the Kodascope to make sure that the end of the film is
secure. See that the film is not twisted between the two
reels.
Turn the control switch to MOTOR and permit the film to
rewind. Exert a slight retarding pressure on the lower
reel to keep the film from unwinding too rapidly.
After the film is rewound, turn the control switch to OFF
and return the rewind lever to its original position.
TO PROJECT SILENT PICTURES
Thread the film through the feed sprocket, the gate,.
and through the sound sprocket as shown in the illustration
on the next page: Be sure to allow an upper and a lower
loop.
Turn the EXCITER LAMP CONTROL knob to OFF unless
VI