Hitachi CP-SX1350 P5SX+, Service Manual

Page: 7 / 78

7
CP-SX1350(P5SX+)
4-6 White balance adjustment (visual inspection)
Preparations
1. Perform these adjustments after the NRSH
adjustment described in Section 4-5.
2. Reset gamma correction before adjustment.
Place the cursor on [GAMMA] in the FACTORY
M E N U , p r e s s t h e [ R E S E T ] k e y a n d s e l e c t
[DEFAULT].
Adjustment procedure
1. First, adjust the G color.
2. S e l e c t G A M M A , S B - C N T, a n d G : i n t h e
FACTORY MENU. If the background is white
solid, press the [ENTER] key on the Remote
control transmitter to change to [G] monochrome
in the 33-tone grayscale.
3. A d j u s t G A M M A , S B - C N T, a n d G : i n t h e
FACTORY MENU so that brightness of 33 steps
is best.
4. Don’t adjust GAMMA, SB-BRT, and G: in the
FACTORY MENU. Because we want to keep
the best contrast ratio.
5. Then adjust colors R and B.
6. Select GAMMA, SB-CNT, and G: in the FACTORY
MENU. If the background is white solid, press the
[ENTER] key on the Remote control trasmitter to
change to [W] monochrome in the 33-tone
grayscale.
7. Adjust GAMMA, SB-BRT, R: and B: in the
FACTORY MENU so that white balance in the
low-brigtness tones is best.
8. Adjust GAMMA, SB-CNT, R: and B: in the
FACTORY MENU so that white balance in the
middle-brightness tones is best.
9. Repeat steps 7 to 8 above, and adjust so that
white balance in the whole brightness tones is
best.
4-5 NRSH adjustment (vertical stripe adjustment)
Signals for internal adjustment Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-4 E-POS adjustment.
2. Use DAC-P - NRSH - R: in the FACTORY
MENU to adjust so that the vertical lines spaced
every 6 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
FACTORY MENU to adjust vertical stripes of G
color.
4. In the same way, use DAC-P - NRSH - B: in the
FACTORY MENU to adjust vertical stripes of B
color.
5. After completing this adjustment, return to Flicker
adjustment in 4-3 and make sure NRSH adjustment
has not affected Flicker performance. If it has
become worse, readjust the Ficker and the NRSH
adjustments.
64
/255
88
/255
112
/255
136
/255
160
/255
Press ENTER key
160
/255
136
/255
112
/255
88
/255
64
/255