3 - 10
7.4
Chroma Gain Adjustment
[For TYPE S/SE] (Figs. 7-2, 7-3, 7-4)
Incompleted Phenomenon:
Color of the picture is denser than that of the subject.
Color of the picture is lighter than that of the subject.
Test Point:
Video Out (PG1601-6)
Equipment/Jig:
Oscilloscope or Vectorscope
C12 light balance filter
Condition:
Attach a C12 light balance filter to lens
Point the at a color bar chart.
Procedure:
1)
Input 4 to PC on the adjustment menu screen.
2)
The chroma gain adjustment screen will appear.
3)
When using an oscilloscope (Fig. 7-2):
Press the D or U key to set the red level on waveform to approx. 620
mVp-p.
Then, while holding down the Ctrl key, press the D or U key to set the
red level on waveform to approx. 620 mV ± 20 mVp-p.
When using a vectorscope (Figs. 7-3, 7-4):
Press the D or U key to set the red vector to approx. 220% of burst
vector.
Then, while holding down the Ctrl key, press the D or U key to set the
red vector to approx. 220% ± 5% of burst vector.
4)
Press the Enter key: The PC display will switch from the chroma gain data
write screen to chroma gain adjustment complete screen.
5)
Press any key to restore the adjustment menu screen.
Chroma gain adjustment
***********************************************************
ADJUSTMENT
***********************************************************
[1]
AUTO IRIS CONTROL
[2]
MATRIX
[3]
WHITE BALANCE
[4]
CHROMA GAIN
[ESC] RETURN TO MAIN MENU
Please select [1] - [3] or [ESC]
Adjustment menu
<< ADJUSTMENT OF CHROMA GAIN >>
ROUGH ADJUSTMENT
FINE ADJUSTMENT
[Crt] + [U]
CHROMA GAIN UP
[Crt] + [D]
CHROMA GAIN DOWN
[ENTER]
SAVE & RETURN TO MENU
[ESC]
QUIT
[U]
CHROMA GAIN UP
[D]
CHROMA GAIN DOWN
<< ADJUSTMENT OF CHROMA GAIN >>
DATA WRITING INTO EEPROM
Chroma gain data write
<< ADJUSTMENT OF CHROMA GAIN >>
ADJUSTMENT FINISHED
PRESS ANY KEY
Chroma gain adjustment complete
Input 4.
When using an oscilloscope
Set the red level on waveform to 620 mV
± 20 mVp-p.
When using a vectorscope
Set the red vector to 220 % ± 5 % of
burst vector.
Press Enter key.
Press any key.
RED
620 mV
± 20 mV
Fig. 7-2
Fig. 7-3 [For TYPE S]
Fig. 7-4 [For TYPE SE]
RED
220 %
± 5 %
BURST
100 %
RED
220 %
± 5 %
BURST
100 %
