Bell and Howell 1598, Руководство пользователя

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P a n chromatic TQIII & TQIII Specialist User Manual
Page
26
12. the projector is set to run, the automatic loop former 43c will distribute this extra
length correctly between the upper and lower loops.
13. Close the main access door. Project as normal
Unthreading
Unthreading is almost the reverse of manual threading and can therefore be more briefly
described.

Open the main access door and pull on the lens to open the gate. Open (as in Stage 37)
the three sprocket guards.

Unscrew the knob 46a securing the exciter lamp cover and pull the cover carefully away
from the projector.

Holding the film at 47a and b, and bringing your hands slightly together, ease it Out of the
horizontal exit channel. Holding it at 47c and d, and again bringing the hands together to
disengage the perforations from the sprocket teeth, lift it away from the upper sprocket
wheel.

Slide the film clear of the film gate and the slot 48a. Hold it as shown and disengage it
front the upper part of the lower sprocket wheel at 48b and the sound drum at 48c.

Finally, again holding the film as shown and bringing the hands together, disengage it from
the lower part of the sprocket wheel. Remove the two loaded spools, for safety winding up
all surplus film.

Replace the exciter lamp cover, ensuring that it is correctly seated all round, and tighten
the securing screw. Close the lens mount and main access door. There is no need to close
the sprocket guards. This will be done automatically next time the automatic threading
lever is used.
Caring for your projector
This Bell & Howell projector is easy to maintain. There are no bearings to be lubricated, no
thermionic valves to become less efficient with time and no special adjustments requiring tools.
The only routine tasks, in fact, are regular cleaning and the occasional replacement of lamps.