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M E C H A N I C A L A N D E L E C T R O N I C A D J U S T M E N T S
This section describes the overall mechanical configuration of the projector and details adjustments that may be required
as the result of repair or parts replacement. All necessary mechanical and electronic adjustments are made before the
projector is shipped from the factory.
Figures 4.1 and 4.2 illustrate the features of the film path side and the mechanical side, respectively, of the 35/70
Projector.
General Approach to Adjustments
The adjustments and replacement procedures described in this section are ordinarily performed individually as the result
of a repair, or because a part has been accidentally disturbed. The order and grouping of the adjustments in this section
represents the typical approach to the projector, and is related to the diagnostic approach embodied in the following
chapter on troubleshooting.
The starting point is to ensure that the system will come into a READY state, and that the shutter and optical system are
performing satisfactorily. Next, the constant velocity system and the film handling loops and gate are set up, and the film
is correctly threaded on the machine. With the film handling in place, the reeling system is set up, allowing the film to be
transported in slew modes. Finally, the pulldown system is set up to allow cine motion and the projection of the image.
In many cases, the adjustment sequence must be repeated to obtain optimum performance. Coarse adjustments are first
made to get the system operating; then finer adjustments are made, often by observing the projected image.
CHRISTIE
CHRISTIE
35/70 Service/PM Manual
March, 1997
6 : M e c h a n i c a l a n d E l e c t r o n i c A d j u s t m e n t s
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