Service manual

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]