JVC DT-V2000SU Service Manual page 69

DT-V2000SU
WHITE BALANCE ADJUSTMENT
•
640X 480 31.5kHz/60Hz
WHITE BALANCE : LOW LIGHT (COLOR TEMP
=
HIGH 9300K)
Test equipment Signal generator (10 step gray scale pattern)
Test points
Adjustment locations Screen VR(FBT), WA04 (R CUTTOF), WA05 (G CUTOFF), WA06 (B CUTOFF)
1. Set the color temp. to HIGH in the MENU.
2. Set the BRIGHT and CONTRAST VR on the front panel to the click position.
3. Input the VGA(640 x 480) 10 step gray scale signal (31.5kHz/60Hz) to the input C terminal.
4. Turn the screen volume(FBT) gradually, to where the 2nd gray bar faintly visible.
5. Adjust WA04, WADS and WA06 not to the colors on the gray bar.
6. The data of WA04~WA06 write into the data of WB04~WB06. Don't adjust the item of WB04~WB06 .
•
640X480
31.5kHz/60Hz
WHITE BALANCE : HIGH LIGHT (COLOR TEMP=HIGH 9300K)
Test equipment
Signal generator (10 step gray scale pattern)
Test points
Adjustment locations WA01 (R DRIVE), WA03 (B DRIVE)
1. Set the color temp. to HIGH in the MENU.
2. Input the 10 step gray scale pattern signal (31.5kHz/60Hz) to the input C terminal.
3. Adjust the WA01 and WA03 to set the color temperature become given bellow (Not to adjust the WA02).
•
COLOR TEMP. HIGH(9300K) x=0.283, y=0.297 (reference value)
4. Confirm that obtain the color tracking between low temperature and high one on the gray scale pattern signal. If illeagal, readjust same
steps as above (at that time, not to change the value of WADS).
640X 480 31.5kHz/60Hz
WHITE BALANCE : HIGH LIGHT (COLOR TEMP
=
LOW 6500K)
•
Test equipment
Signal generator (10 step gray scale pattern)
Test points
Adjustment locations WB01 (R DRIVE), WB03 (B DRIVE)
1. Set the color temp. to LOW in the MENU.
2. Input the 10 step gray scale pattern signal (31.5kHz/60Hz) to the input C terminal.
3. Adjust the WB01 and WB03 to set the color temperature become given bellow (Not to adjust the WB02).
COLOR TEMP. HIGH{6500K) x=0.313,
y=0.329 (reference value)
4. Confirm that obtain the color tracking between low temperature and high one on the gray scale pattern signal. If illeagal, readjust same
steps as above (at that time, not to change the value of WB0S) .
•
No. 51519B 53