Epson Elp-3500, Service Manual, Page: 91 / 114

EPSON ELP-3500 Service Manual
5-6
adjustment menu
Figure 5-6.
3. Use the right and left arrow keys to adjust the image so that the two patterns on the
right side are brightest and are of equal intensity.
* When you press the left arrow key, an adjustment value from "0(00) to 64(40)"
appears in the lower left corner of the screen.
4. Press
Enter, and a 16-level green-scale pattern should appear on the screen.
5. Just as in step 3, adjust so that the two blocks on the right are brightest.
6. Press
Enter, and a 16-level blue-scale pattern should appear on the screen.
7. Just as in step 3, adjust so that the two right blocks are brightest.
8. Press
Enter, and the following message appears on the screen:
9. Look at the white balance on the screen. If the hue of 16-level grayscale pattern
seems reddish, greenish, or bluish, you must type N and run the sub-contrast
adjustment again. If the white balance is satisfactory, type Y.
10. Use the eighth raster in the 16-grayscale pattern on the projection screen to check
the white balance. Type Y if the sub contrast adjustment is satisfactory. Type N to
rerun the sub contrast adjustment.
11. Check for the brightest raster in 16-level grayscale pattern. Put a color meter on the
projector screen, and measure the chromatophore X and Y. Then plot a
measurement value on the diagram below. The plot point should be in the range A-B-
C-D of the diagram. If the point is out of range, you should type N, and redo steps 3
to 11. Type Y if the sub contrast adjustment is satisfactory. Type N to rerun the sub
contrast adjustment.
Are you sure? [Y/N]