[White Balance Adjustment]
1. Outline of the white balance adjustment and calibra-2. Preparation for Adjustment
tion of the color analyzer that is used for the white2.1 Connect the 480/60i (525) WINDOW signal to the
balance adjustment are described first.ANALOG Y/G input connector.
1,1 The parameter that converts the RGB drive voltage of2.2 Connect the RS-232C connector of a color analyzer
a CRT to the chromaticity coordinate is acquired.CA-100 with the OPTION connector of a monitor
using the cable that is shown by section O3-1. Set-Up
This monitor has the copy function of the color temperatureAdjustment When CRT is Replaced - Required tools
data between two or more monitors.and measuring instruments, item 8�.
However, the CRT drive voltage are unique in every2.3 Set up the CA-100 as described below. Attach the
monitor because it is different depending on each CRT.measurement probe of the CA-100 to the center of the
Therefore, the same color temperature cannot be obtained inCRT screen.
multiple monitors even though the same drive voltage isDisplay modexyY mode
given to them. It means that the data that is used to copy theBaud rate9600
color temperature, must be the xyY chromaticity coordinate
or similar data that does not depend on each CRT, unlike the3. White Balance Adjustment
CRT drive that depends on each CRT.3.1 White Balance Adjustment (1)
When the D93 MANUAL adjustment is implemented using1. Press the SHIFT ON button [to turn on the LED (orange)
the MAINTENANCE/SYSTEM/COLOR TEMP menu ofon top of the SHIFT button]. Press the 16:9 ON button
the SYSTEM CONFIG menu, the parameter that converts[to turn on the LED (orange)] to select the 16:9 mode.
the CRT drive voltage to the chromaticity coordinate is2. Press the MONO ON button to select the B/W mode.
created while the adjustment is implemented. This parame-[The green LED turns on.]
ter is used when copying the color temperature data to other3. Select MAINTENANCE menu of the SYSTEM
monitors as shown.CONFIG menu.
4. Select VIDEO menu of the MAINTENANCE menu.
5. Take note of the SUB CONTRAST data. Then set 100
to the SUB CONTRAST data.
6. Select SYSTEM/COLOR TEMP menu of the MAIN-
TENANCE menu.
7. Select D93 of the SYSTEM/COLOR TEMP menu. Then
CRT drive voltageCRT drive voltage
cover the entire CRT screen surface with a black blind cloth.
Select the MANUAL adjustment item and adjust the white
balance until the following value is obtained.
x = 0.283
Chromaticity coordinateChromaticity coordinate
y = 0.297
Data transmission
8. Select D65 of the SYSTEM/COLOR TEMP menu.
Fig. 1-17
Then cover the entire CRT screen surface with a thick
black blind cloth. Select the MANUAL adjustment
1.2 D65 color temperature adjustment
item and adjust the white balance until the following
1.3 Copying the color temperature data to the STD color
value is obtained.
temperature, COLOR1 color temperature and COL-
x = 0.313
OR2 color temperature.
y = 0.329
..... On calibration of the color analyzer
9. Select the SYSTEM/COLOR TEMP/COPY/OTHER
When color temperature of any monitor is measured by
VALUE menu.
two or more color analyzers, these color analyzers show
10. After selecting the STD item of the COLOR TEMP menu,
different measurement values even though the object of
select D93. Copy the D93 color temperature data to STD.
measurement is the same. Also the measurement value
11. After selecting the COLOR1 item of the COLOR
of color analyzer changes as time elapses.
TEMP menu, select D65. Copy the D65 color temper-
Therefore, any color analyzer must be calibrated so that
ature data to COLOR1.
it shows the correct measurement value of the following
12. After selecting the COLOR2 item of the COLOR
chromaticity coordinate before using the analyzer.
TEMP menu, select D93. Copy the D93 color temper-
2
xyy (cd/m)ature data to COLOR2.
13. Select VIDEO menu of the MAINTENANCE menu.
D650.3130.3292.7
14. Return the SUB CONTRAST data to the original data.
0.3130.329120
15. Press the MONO button to the OFF position to cancel
D930.2830.2972.7
the B/W mode. [The green LED turns off.]
0.2830.297120
3-12BVM-D14H1U/D14H5U/D14H1E/D14H5E/D14H1A/D14H5A |
ACEC
SONY
