B (Blue) Matrix Adjustment - Hitachi DZMV238EAU Service Manual

6.4 B (Blue) Matrix Adjustment (Fig. 6-1)
Caution:
The B matrix adjustment applies only to the following models:
The adjustment name will appear on the camera adjustment menu
screen only for models that need this adjustment.
DZ-MV200A/MV200A(K)
DZ-MV208E(AU)/MV208E(SW)
DZ-MV200E/MV200E(UK)
Be sure to complete the B matrix adjustment before performing the
white balance adjustment.
Phenomenon due to incomplete adjustment:
Color reproduction is degraded.
Test equipment/jig:
Oscilloscope
Test point:
Video output
Status during adjustment:
Attach a C12 light balancing filter.
Point at a color bar chart.
Procedure:
1) Input 4 to PC on the camera adjustment menu screen.
2) The B matrix adjustment screen will appear.
3) Press the U key on PC to minimize the yellow (YEL) level on waveform.
4) Press the D key on PC so that the ratio between the yellow (YEL) and
blue (BLU) levels on waveform is as shown in Table 6-2 (rough
adjustment).
Then, while holding down the Ctrl key on PC, press the D and U keys so
that the ratio between the yellow (YEL) and blue (BLU) levels on
waveform is as shown in Table 6-2 (precise adjustment).
5) Press the Enter key on PC: The screen on PC display will switch from
data writing to adjustment complete.
6) Press any key on PC to restore the camera adjustment menu screen on
PC display.
Table 6-2 B Matrix Adjustment Value
Model
DZ-MV200A/MV200A(K)
DZ-MV208E(AU)/MV208E(SW)
DZ-MV200E/MV200E(UK)
YEL
3 - 20
YEL : BLU
3 : 10
1 : 4
1 : 4
YEL
BLUE
BLUE
Fig. 6-1
Camera adjustment menu screen
***********************************************************
CAMERA ADJUSTMENT
***********************************************************
[1] SAMPLING PULSE
[2] AUTO IRIS CONTROL
[3] SHUTTER
[4] B MATRIX
[5] WHITE BALANCE
[6] CHROMA GAIN
[ESC] RETURN TO MAIN MENU
Please select [1] - [6] or [ESC]
Input 4 to PC
B matrix adjustment screen
<< ADJUSTMENT OF BLUE MATRIX >>
ROUGH ADJUSTMENT
[U] UP
[D] DOWN
FINE ADJUSTMENT
[Crt] + [U] UP
[Crt] + [D] DOWN
[ENTER] SAVE & RETURN TO MENU
[ESC] QUIT
Press the U or D key on PC to minimize
the yellow (YEL) level on waveform.
Press the D key on PC so that the ratio
between the yellow (YEL) and blue
(BLU) levels on waveform is as shown in
Table 6-2 (rough adjustment).
Then, while holding down the Ctrl key
on PC, press the D and U keys so that
the ratio between the yellow (YEL) and
blue (BLU) levels on waveform is as
shown in Table 6-2 (precise adjustment).
Data writing screen
<< ADJUSTMENT OF BLUE MATRIX >>
DATA WRITING INTO EEPROM
Adjustment complete screen
<< ADJUSTMENT OF BLUE MATRIX >>
ADJUSTMENT FINISHED
PRESS ANY KEY
Press any key on PC to restore the
camera adjustment menu screen:
The adjustment is now complete.