Toshiba TLP-X4500 Service Manual page 8

4-4 NRSH adjustment (vertical stripe adjustment)
Signals for internal adjustment
24 48 72 96
/255 /255 /255 /255
4-5 White balance adjustment (visual inspection)
Preparations
1. Perform these adjustments after the NRSH
adjustment described in Section 4-4.
Adjustment procedure
1. First, adjust the G color.
2. Select GAMMA, SB-CNT, and G: in the FACTORY
MENU. If the background is white solid, press the
[ENTER] key on the Remote control transmitter to
change to [G] monochrome in the 29-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 29 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.
TLP-X4500(P5XMLA)
120 144 168 192
/255 /255 /255 /255
Adjustment procedure
1. Make this adjustment after completing the
adjustment in 4-3 Flicker 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
a d j u s t m e n t i n 4 - 3 a n d m a k e s u r e N R S H
adjustment has not affected Flicker performance.
If it has become worse, readjust the Ficker and
the NRSH adjustments.
2. Reset gamma correction before adjustment.
Place the cursor on [GAMMA] in the FACTORY
MENU, press the [RESET] key and select
[DEFAULT].
6. 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 trasmitter to change to [W] monochrome
in the 29-tone grayscale.
7. Adjust GAMMA, SB-BRT, R: and B: in the
FACTORY MENU so that low-brigtness white
balance is best.
8. Adjust GAMMA, SB-CNT, R: and B: in the
FACTORY MENU so that middle-brightness
white balance is best.
9. Repeat steps 7 to 8 above, and adjust so
that brightness white balance of 29 steps is
best.
7