Sanyo WF10 - PLV WXGA LCD Projector, Service Manual

Page: 47 / 133

-47-
Fig.-5
Standard
needs
adjustment
Fig.-6
Fig.-7
LCD Panel convergence adjustment.
Convergence adjustment
1. Enter the mode of “service adjustment” and project a grid pattern on a
screen. (Refer to the item 3 of “before adjustment ” on page 44.)
■
When the Green LCD panel is replaced, project a Cyan or Yellow grid pattern.
■
When the Red LCD panel is replaced, project a Yellow grid pattern.
■
When the Blue LCD panel is replaced, project a Cyan grid pattern.
2. Loosen the 2 screws- D (Figure 3 and 4 on page46), or check that they
are loosening.
To parallel the grid pattern.
3. Adjust the screw-
E
(The adjustment screw “E” turns an image.)
so that the grid
pattern which needs adjustment may be paralleled with a standard
grid pattern. (Figure-5)
To converge the vertical line.
4. Adjust the screw- F
(The adjustment screw F" moves an image horizontally.)
so that the
vertical line of grid pattern which needs adjustment may be converged
with the vertical line of a standard grid pattern. (Figure-6)
5. Tune finely by repeating Steps 3 and 4.
To converge the horizontal line.
6. Adjust the screw-
G
(The adjustment screw "G" moves an image vertically.)
so that the
horizontal line of grid pattern which needs adjustment may be con-
verged with the horizontal line of a standard grid pattern. (Figure-7)
7. Tune finely by repeating steps 3 through 6.
8. Tighten the 2 screws- D (previously loosened in step 2 above) with the
allen wrench.
9. After tightening the screws, check the adjusted convergence condition.
If not aligned repeat steps 2 through 8. (Note : The convergence con-
dition may shift by tightening the screw-
D .)
Before convergence adjustment.
■
Make sure each Red, green and Blue LCD Panel has been cor-
rectly installed, and that focus adjustment has been completed
before preforming convergence adjustment.
■
Screws E, F and G (Figure-3 on page-46.) are for convergence
adjustment.
Caution:
■
Don't replace the Red, Green and Blue LCD panels simul-
taneously!
It becomes impossible to adjust a convergence, if all the LCD
panels are simultaneously replaced. When all the LCD panels
are damaged, replace the whole LCD panel / prism assembly.
■
Don't use the light block sheet.
Don't use the light block sheet. It becomes the cause which
burns polarizer.
Image movement and screw turning.
To make parallel. ;The adjustment screw “ E ” turns an image.
To converge vertical line. ;The adjustment screw “ F ” moves an image horizontally.
To converge horizontal line. ;The adjustment screw “
G
” moves an image vertically.