Kodak DryView 8300 Service Bulletins page 83

6. Vertical Streaks Down the Length of the Film (Processor Related)
Problem
Thin (1 to 5 mm) vertical streaks down the entire length of the film. To confirm that the streaks are not
optics-related, remove a sheet of film from the film tray and expose it to ambient light for only about 2-3
seconds. Then reinsert it into the film tray. Run the transport test, which sends film through the imager with
the optics module deactivated. If the streaks appear on the processed film, they are processor (drum)
related.
Cause
The streaks are actually a difference in density from the rest of the image, caused by a scored drum surface.
The drum gets scored when small deposits of faz accumulate on the under side of the stripper assembly.
This sometimes is the result of the operator powering the imager off at night, which allows the faz to cool
and harden.
Solution
Replace the drum if its scored surface is causing the streaks. To prevent such streaks from occurring again,
clean the underside of the stripper assembly when you are doing a PM. In addition, advise the operator that
it is recommended that the power to the imager be left on 24 hours a day.
7. Vertical Streaks Down the Length of the Film (Optics Related)
Problem
Wide vertical streaks down the film that are most obvious on the mid-tone bands of the film calibration
sheet. The streaks are generally near the center third of the film. To confirm that the streaks are optics-
related, remove a sheet of film from the film tray and expose it to ambient light for only about 2-3 seconds.
Then reinsert it into the film tray. Run the transport test, which sends film through the imager with the
optics module deactivated. If the streaks still appear on the processed film, they are processor (drum)
related, not optics related. (In this case, see the preceding paragraph.)
Cause
Dust off the final deflection mirror in the optics module.
Solution
Remove the optics module and use canned air to blow the dust off the deflection mirror, as viewed through
the aperture. Make sure to hold the can upright and sweep across the mirror with smooth but definite
motion. If you do not use this technique, the air may sputter, causing liquid spots on the mirror. Reinstall
the optics module and run several films to verify that the mirror is now clean.
8. Mini Moire
Problem
The artifact called "Mini-Moire" is a very subtle pattern across the width of the film that appears as swirled
pixels. Its thickness can range from a few scan lines up to an inch (2.54 cm) in height.
Cause
This artifact is the result of a stability problem in the optics module galvanometer.
Solution
Replace the optics module.