Panasonic DLP PT-52DL52 Service Manual page 37

adjust so that each end of its horizontal and vertical line comes on
to the screen frame midpoint marker.
10. When tightening 3 screws (3), make sure that the adjusted screen
position is not affected. If affected, repeat the procedure again.
Specification
Deviation of vertical and horizontal line ends from midpoint markers within ± 1.0mm.
9.4. Lens array position adjustment
1. Enter serviceman mode and select TEST (WHT).
2. Loosen screw (7).
3. While watching white pattern, turns screw (8) or slide the slide
adjuster (9) and adjust the position to obtain the best overall
illumination area.
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