Download Print this page

Focus Adjustment - Hitachi H972 Service Manual

High resolution color display monitor
Hide thumbs

Advertisement

X=0.281  0.008, Y=0.311  0.008
(Either Red color or Green color must be set to the maximum (FFh) )
(5) Register the readings of R/G/B BKG and Color dada (Color 1) to the microprocessor.
3.4 White balance adjustment (Color 3)
(1) Receive a signal of 94A with a 100100 mm window pattern.
(2) Set Brightness Control to the center (7Fh) and C-Cont to the minimum (00h).
(3) Adjust the light output to 80 cd/m
Color 2 mode.
(4) Set Red color to the maximum (FFh).
(5) Adjust the white balance of high light output by Green and Blue color adjustments to read CIE coordinate of
X=0.336  0.008, Y=0.352  0.008
(6) Register the readings of R/G/B BKG and Color data (Color 3) to the microprocessor.
3.5 White balance adjustment (DMS)
(1) Register Color 1 data(R/G/B BKG and Color data) to the microprocessor as DMS Color data.
3.6 Brightness adjustment
(1) White balance adjustment must have been done before Brightness adjustment.
(2) Receive signal of 94A with a blank signal pattern.(Black video)
(3) Set Brightness and Contrast, C-Cont Control to their maximums.
(4) Ambient light on the surface of the CRT should show lower than 20 lux.
(5) Select Color Select to Color 1.
(6) Adjust the light output to 1.2 cd/m
(7) Register the readings of Sub Brightness to the microprocessor (Sub Brightness data).
(8) Set Brightness Control to the center (7Fh) and C-Cont to the minimum (00h).
(9) Receive a signal 94A with a window pattern (100  100 mm)
(10) Adjust the light output to(*1) 150 cd/m
Contrast Control.
(11) Register the readings of Sub Contrast to the microprocessor (DMS Sub Contrast data).
(12) Adjust the light output to (*1)125 cd/m
Control.
(13) Register the readings of Sub Contrast to the microprocessor (Sub Contrast data).
(14) Receive a signal of 94A with a full white pattern.
(15) Adjust the light output to (*1) 110 cd/m
(16) Register the readings of ACL to the microprocessor (ACL data).

4 Focus adjustment

(1) Receive signal 94A with a full screen "E" characters.
(2) Set user Contrast control to its maximum.
(3) Set user Brightness control so that the back ground raster is just diminished.
(4) Adjust S-Focus control on the FBT so that focus at the middle points between the center of the screen to its
best.
(5) Adjust D-Focus control on the FBT so that focus at four corners of the screen to its best.
2
(23.3ft-L) at the center of screen by adjusting Sub Contrast Control in
2
(0.35 ft-L) at the center of screen by adjusting Sub Brightness Control.
2
(43.8 ft-L) at the center of screen by adjusting Sub
2
(36.5 ft-L) at the center of screen by adjusting Sub Contrast
2
(32.1 ft-L) at the center of screen by adjusting ACL Control.
D-FOCUS ( FOCUS 1 )
S-FOCUS ( FOCUS 2 )
SCREEN
 23 

Advertisement

loading

  Related Manuals for Hitachi H972

This manual is also suitable for:

Sm0401Cm772etCm772uCm771uCm771et