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6
Function Mode and Adjustment
104
6.9.6 b6: Shading Correction
This adjustment is necessary after the replacement of PWB-A or PWB-
BB.
1. Checks the surface of the 1st to 3rd scan path mirror and if dirty clean
it.
2. Place Projection Lens TYPE 2 in position and set a lens zoom ratio of
20X.
3. Load film and bring the image into focus.
(Do not move the focus ring after this operation).
4. Remove the Projection Lens and the Film Carrier.
5. Remove the Optical Cover and Prism from the machine.
6. Cover the entire Screen with a black sheet of paper to prevent an
extraneous light from striking the Screen.
7. Turn on the Power Switch and waits for 5 minutes and stabilizes
temperature of IC on PWB-A.
8. Set the function mode into "b6" and depress the Mode Memory key to
perform the Shading Correction.
9. The execution time of a Shading Correction is 10 minutes from about
6 minutes.
A Display changes as follows during Shading Correction execution.
H1→H2→H3→.....→H9→H0→1(E1)
When a display was set to "1" or "E1", Shading Correction was
completed.
(Displays "E1", when a printer is not connected)
10. When a Shading Correction carries out an unusual end on the way and
displays "C3", perform once again from Procedure 1.
11. After Shading Correction is completed, attach the Film Carrier and
Prism.