User`s manual

A-Chain Alignment Procedures
Notes
4-3
a. Preliminary Procedures
If a stereo solar cell is already installed on Projector No. 1, inspect the surface of
the cell for cracks, chipping, or other damage. If the cell appears to require
replacement, remove the mounting bracket from the projector and replace the
cell and mounting block assembly.
Clean the lens surfaces with a cotton swab moistened with glass cleaner. But
keep in mind that you may find during optical preamplifier adjustment, that it
will be necessary to remove and inspect the lens if the high-frequency response
is not correct.
If the lens is removed, clean the lens as indicated above and look through the
lens at a bright light. Repeated alternate heating and cooling of the lens can
cause oil or other contaminants to enter the lens barrel. Verify that there is a
clear, unobstructed light path through the lens and that the edges of the slit are
sharp without cracks or corrosion. Fit a new lens assembly if you are unable to
clear the optical path through the slit.
Inspect the lateral film guides for evidence of cuts, cracks, surface defects, and
any foreign materials that could impair the film guiding. Clean as required or
replace the guides, as necessary. Make sure the guide roller rotates freely and,
if it is spring mounted, make sure that lateral movement and return is not
obstructed. If the roller has a felt or rubber insert, check for a flat spot and
replace the roller if necessary.