Hitachi ED-X31EP Service Manual page 9

4-5 E-POS adjustment (vertical bars adjustment 2)
Test pattern for the adjustment
112/255
4-6 White balance adjustment (visual inspection)
Preparations
1. Perform these adjustments after the adjust-
ments described in Section 4-5.
Adjustment procedure
1. First, adjust the G color.
2. Select GAMMA, SUB-CNT, and G: in the FACTORY
MENU. If the background is white solid, press the
[ENTER] key on the Remote control transmitter to
change to [G] monochrome in the 33-tone grayscale.
3. Adjust GAMMA, SUB-CNT, and G: in the FAC-
TORY MENU so that brightness of 33 steps is
best.
4. Don't adjust GAMMA, SUB-BRT, and G: in the
FACTORY MENU because we want to keep the
best contrast ratio.
5. Then adjust colors R and B.
ED-X31E / ED-X33E (C14B-20)
Adjustment procedure
1. Make this adjustment after completing the ad-
2. Use DAC -P - E-POS - R in the FACTORY MENU
3. In the same way, select DAC-P - E-POS - G
4. In the same way, select DAC-P - E-POS - B
2. Reset gamma correction before adjustment.
6. Select GAMMA, SUB-CNT, and G: in the FACTORY
7. Adjust GAMMA, SUB-BRT, R: and B: in the
8. Adjust GAMMA, SUB-CNT, R: and B: in the
9. Repeat steps 7 to 8 above, and adjust so that
9
justment in the section 4-4.
and use it so that vertical bars are minimized.
and use it so that vertical bars are minimized.
and use it so that vertical bars are minimized.
Place the cursor on [GAMMA] in the FACTORY
MENU, press the [RESET] key and select RESET.
MENU. If the background is white solid, press the
[ENTER] key on the remote control to change to [W]
monochrome in the 33-tone grayscale.
FACTORY MENU so that low-brightness white
balance is best.
FACTORY MENU so that middle-brightness
white balance is best.
brightness white balance of 33 steps is best.