FIGURE 12
SHUTIER
LOCK
Operating Tips
The perforations in the film should be toward you as film comes off
the bottom of the supply reel. If they are not, the film has not been
rewound or was twisted while being rewound.
If the gate is left open, the projected picture will be out of focus.
If the picture is unsteady, check the upper and lower loops; these
must be maintained. The lower loop should not touch the master con
trol cover nor the loop-forming roller. The sprocket teeth must show
through the film perforations. Make sure that the gate and the
sprocket clamps are closed.
If loss of loop occurs:
sound
film-quickly press down the loop
forming roller as far as it will go while the projector is running and
then release the roller;
silent film-stop
the motor immediately and
re-form the loops.
If the projector is stopped during the projecting of a reel of s
�
o nd
film, turn the trial thread knob several revolutions clockwise
.
to take
up any slack between the lower sprocket and the sound drum.
If there is no sound, check to make sure that:
Speaker cord is connected.
Amplifier is turned on-depress amplifier power button and/or cir
cuit breaker.
Sound track is overriding edge of sound drum properly.
Film is between the flanges of sound drum pressure roller.
Exciter lamp is not burned out and is seated on all three studs.
Sound input switch is at FILM.
If the sound quality is not up to par, check to make sure:
Speed selector is at proper position.
Lower loop is of the proper size.
Film is snug around sound drum and drum is clean.
Volume is not too high.
Tone balance is correctly adjusted.
Fidelity lever is adjusted for correct sound optics focus.
Film sound track is of good quality.
Sound optics unit has been properly seated after cleaning.
Sound is synchronized with the picture. If it is not, the cause may be
an improperly formed lower loop. To re-form the loop, press down
the loop-forming roller while the projector is running.
13
