Hitachi CP-X880 Service Manual page 6

4-3 Flicker adjustment
Signals for internal adjustment
4-4 NRSH adjustment
Signals for internal adjustment
24 48 72 96 120
/255 /255 /255 /255 /255
CP-X880/CP-X885
(V.COM adjustment)
(vertical stripe adjustment)
144 168 192
/255 /255 /255
Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-2 Ghost adjustment.
2. Use DAC-P - V.COM - R: in the Adjustment menu
to adjust so that the flicker at the center of the
screen is less than the flicker at the periphery.
(When the flicker is about the same across the
whole screen, adjust so that the flicker at the center
of the screen is somewhat less than elsewhere.)
3. In the same way, use DAC-P - V.COM-G: in the
Adjustment menu to adjust the G color flicker.
4. In the same way, use DAC-P - V.COM-B: in the
Adjustment menu to adjust the B color flicker.
Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-3 Flicker adjustment.
2. Use DAC-P - NRSH - R: in the Adjustment menu
to adjust so that the vertical lines spaced every
12 dots are as inconspicuous as possible.
(Reduce the adjustment value when black
stripes appear in the 2nd or 3rd tone from the
black side. Note that when the adjustment value
is lowered, white stripes may appear in the 2nd
or 3rd tone from the bright side. Should this
happen, adjust so that the stripes are as
inconspicuous as possible.)
3. In the same way, use DAC-P - NRSH - G: in the
Adjustment menu to adjust vertical stripes of G
color.
4. In the same way, use DAC-P - NRSH - B: in the
Adjustment menu to adjust vertical stripes of B
color.
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