BenQ SP920 Product Service Manual page 56

2. Overfill adjustment
1. "Full White Pattern" is suggested for this alignment.
2. Adjust 2 LP-alignment Screws (upper side / lower front side of Optical Engine) behind Color
Wheel.
3. Alignment Criteria is to adjust these 2 screws until "No Dark Edges＂ and " No
Shadows＂ can be observed in image.
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