Hitachi C11XM25, Service Manual

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6
CP-X444(C11XMB)/CP-X440(C11XM25)
4-3 Ghost adjustment
Signals for internal adjustment
30%
112/255
30%
0/255
Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-2.
2. Choose Advance menu > OPTION > SERVICE
> GHOST > R,G and B, and set them to zero.
3. Open the FACTORY MENU and choose DAC-P
> GHOST > R,G and B to display each color of
test patterns for adjustments.
Confirm if there is ghosting on the both sides of
black pattern. If visible, perform this adjustment
as following procedure.
4. Use DAC-P - GHOST - R: in the FACTORY MENU
to adjust so that R color ghost is at a minimum.
(Set the adjustment value to default, and then
raise the value. When a ghost appears to the left
of a vertical line, reduce the value by 3 steps.
Then, if a ghost image is visible on the right of
an original image, raise the number by 1 step.)
5. In the same way, use DAC-P - GHOST-G: in
the FACTORY MENU to adjust so that G color
ghost is at a minimum.
6. In the same way, use DAC-P - GHOST-B: in
the FACTORY MENU to adjust so that B color
ghost is at a minimum.
4-2 Convergence adjustment
Signal pattern for internal adjustment
Adjustment procedure
Perform this adjustments only when the conver-
gence is not good.
1. O p e n F A C T O R Y M E N U a n d t h e n s e l e c t
OPTION > CNV-V. Use R and/or B so that
three colors of images can be converged at
center, top and bottom of the screen.
2. In the same way, select OPTION > CNV-H and
use R and/or B so that three colors of images
can be converged at center, left and right of the
screen.