White Balance Adjustment; Chroma Gain Adjustment - Hitachi DZMV238EAU Service Manual

6.5 White Balance Adjustment

Phenomenon due to incomplete adjustment:
The original color of subject is different from that of output image.
White subject is not seen as white.
Status during adjustment:
Attach a C12 light balancing filter.
Set the zoom to wide end, and point at a grayscale chart.
Procedure:
1) Input 4 or 5 to PC on the camera adjustment menu screen. (*1)
2) The R-B offset screen will appear: Input the 2-digit R-B offset code,
referring to Table 6-3, and then press the Enter key.
3) The Mg-G offset screen will appear: Input the 2-digit R-B offset code,
referring to Table 6-3, and then press the Enter key.
4) Follow the instructions on PC display thereafter. (The adjustment will be
complete when the camera adjustment menu screen is restored.)
*1: The number to be input will differ depending on the model (B matrix
adjustment necessary or not): Input the number, following the camera
adjustment menu screen that appears on actual PC display.
Table 6-3 R-B/Mg-G Offset Codes
Model
DZ-MV230A/MV230A(K)
DZ-MV200A/MV200A(K)
DZ-MV238E(AU)/MV238E(SW)
DZ-MV230E/MV230E(UK)
DZ-MV208E(AU)/MV208E(SW)
DZ-MV200E/MV200E(UK)
6.6 Chroma Gain Adjustment (Figs. 6-2, 6-3, 6-4)
Phenomenon due to incomplete adjustment:
The color of output image is denser than that of subject and/or lighter than
that of subject.
Test equipment/jig:
Oscilloscope (or vectorscope)
Test point:
Video output
Status during adjustment:
Attach a C12 light balancing filter.
Point at a color bar chart.
Procedure:
1) Input 5 or 6 to PC on the camera adjustment menu screen. (*1)
*1: The number to be input will differ depending on the model (B matrix
adjustment necessary or not): Input the number, following the camera
adjustment menu screen that appears on actual PC display.
R-B offset code Mg-G offset code
0 (zero) A 0 (zero) 0 (zero)
12
0 (zero) A 0 (zero) 0 (zero)
0 (zero) A 0 (zero) 0 (zero)
0 (zero) E
0 (zero) E
Camera adjustment menu screen
***********************************************************
***********************************************************
[1]
[2]
[3]
[4]
[5]
[6]
[ESC] RETURN TO MAIN MENU
Please select [1] - [6] or [ESC]
Input 4 or 5 to PC (*1)
R-B offset screen
<< WHITE BALANCE ADJUSTMENT >>
INPUT DATA OF OFFSET FOR R-B --> 00
Input the corresponding 2-digit R-B
offset, referring to Table 6-3, and press
Enter.
Mg-G offset screen
<< WHITE BALANCE ADJUSTMENT >>
1B
INPUT DATA OF OFFSET FOR Mg-G --> 00
1F
Input the corresponding 2-digit Mg-G
1F
offset, referring to Table 6-3, and press
Enter.
Follow the instructions on PC display
thereafter. (Adjustment will be complete
when the camera adjustment menu
screen is restored.)
Camera adjustment menu screen
***********************************************************
***********************************************************
[1]
[2]
[3]
[4]
[5]
[6]
[ESC] RETURN TO MAIN MENU
Please select [1] - [6] or [ESC]
Input 5 or 6 to PC (*1)
<Continued on next page>
CAMERA ADJUSTMENT
SAMPLING PULSE
AUTO IRIS CONTROL
SHUTTER
B MATRIX
WHITE BALANCE
CHROMA GAIN
CAMERA ADJUSTMENT
SAMPLING PULSE
AUTO IRIS CONTROL
SHUTTER
B MATRIX
WHITE BALANCE
CHROMA GAIN
3 - 21