EK-620U/EK-621W
4-5
4. Wheel Index Adjustment
Note: After replacing main board,engine,filter wheel,combiner
or update FW please execute phosphor and filter wheel
index adjustment.
(1) Phosphor Wheel Index Adjustment:
Procedure - Project the 64 Gray RGBW pattern.
- Test timming:WUXGA 1920 x 1200 @60Hz
- Enter Service Mode,Click Phosphor wheel Index.
- Adjust the index upwards until blue does
not appear smooth,record the a index value.
- Adjust the index downwards until blue does
not appear smooth,record the b index value.
- Set the index value to (a+b)/2.
Criteria
- Blue Color in 64 Gray RGBW appear sharp
and clear,no noise is visible on the screen.
(2) Filter Wheel Index Adjustment:
Procedure - Project the 64 Gray RGBW pattern.
- Test timming:WUXGA 1920 x 1200 @60Hz
- Enter Service Mode,Click Filter wheel Index.
- Adjust the index upwards until blue &red does
not appear smooth,record the a index value.
