Eiki EK-815U Service Manual page 48

2. Phosphor Wheel Index Adjustment
Note: After replacing main board,combiner or upgrading firm-
ware, the phospher wheel Index adjustment should be done.
Equipment - Video generator
Test signal - 1080P 1920 x 1080 @60Hz
WUXGA 1920 x 1200 @60Hz
Test pattern - 64 Gray RGBW
Inspection item - Check if each color level is well-functioned.
- Color saturation.
Criteria - Blue colors in 64 Gray RGBW test pattern
appear sharp and clear.
- No noise is visible on the screen.
Procedure - Project the 64 Gray RGBW pattern.
- Enter into service mode.
- Click wheel index (3x) or select wheel
index (2x).
- Click phosphor wheel index.
- Set up for the phosphor index value.
Only confirm the blue color level as the other
color levels are not taken into account.
a. Adjust the index upwards until red does
not appear smooth. Record the a index
value.
b. Adjust the index downwards until red
does not appear smooth. Record the b
index value.
c. Set the index value to (a+b)/2.
EK-815U
Confidential
4-5