White Balance Adjustment; Video Color Temperature Adjustment (High); Video Color Temperature Adjustment (Medium) - Hitachi P50H401 Service Manual

5 WHITE BALANCE ADJUSTMENT

General Notes for White Balance
(1) If the incident illumination is more than 20 lux,
change the environment (location, lighting, etc.) and
ensure it to be less than 20 lux.
(2) At least one of the color drive codes must stay at its
maximum value, FF
5.1 VIDEO COLOR TEMPERATURE ADJUSTMENT
(HIGH)
Preparation 1
(1) Set the output of signal generator to white raster.
(Ratio:100%)
(2) Component signal (480i)
Video level:
SYNC:
Set-up level:
(3) Input white raster signal into COMPONENT input
terminal of the PDP set.
(4) Set user control to Day(Dynamic) mode. (Picture Mode)
(5) Confirm that the mode is set as "Factory Setting
Mode".
(6) Aspect: 4:3 Expanded
Adjustment
(1) Perform the following adjustment with the remote
control.
(2) Set the CRT color analyzer (CA-100) at the center of
the panel.
(3) Set color temperature to "HIGH".
(4) Ensure that Adjustment R/G/B DRIVE (HIGH) are all
set as FF.
(5) After receiving White raster signal, step down the two
(or one) among Adjustment R/G/B DRIVE (HIGH)
and adjust the value shown in the following:
Specification
Video Color temperature (HIGH)
x = 0.266 ± 0.005
y = 0.270 ± 0.005
(Color temp: 14000K+0MPCD)
At least one of the data should be FF.
BACK TO ADJUSTMENTS
.
H
0.700Vp-p
0.300Vp-p
0V
Remarks
(1) Color temperature should be adjusted under the
condition in which the screen is the brightest, thus
the initial value for adjustment is set to its maximum.
(2) Adjustment is made by reducing brightness only.
Reduce a bright color for adjustment.
(3) Video color temperature & Adjustment No. are the
same, but addresses in the memory are different,
thus there's no problem.
5.2 VIDEO COLOR TEMPERATURE ADJUSTMENT
(MEDIUM)
Preparation
(1) Same as "Video Color Temperature adjustment:
(HIGH)".
Adjustment
(1) Perform the following adjustment with the remote
control.
(2) Set the CRT color analyzer (CA-100) at the center of
the panel.
(3) Set color temperature to "MEDIUM" .
(4) Ensure that Adjustment R/G/B DRIVE (MEDIUM) are
all set as FF.
(5) After receiving White raster signal, step down the two
(or one) among Adjustment R/B/G DRIVE (MEDIUM)
and adjust the value shown below.
Specification
Video Color temperature (MED)
x = 0.285 ± 0.005
y = 0.293 ± 0.005
(Color temp: 9300K )
At least one of the data should be FF.
Remarks
(1) Color temperature should be adjusted under the
condition in which the screen is the brightest, thus
the initial value for adjustment is set to its maximum.
(2) Adjustment is made by reducing brightness only.
Reduce a bright color for adjustment.
(3) Video color temperature & Adjustment No. are the
same, but addresses in the memory are different,
thus there's no problem.
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DW3U