Sony VPH-D50Q Manuel D'installation page 21

7
Move the red lens right and left to adjust the CRT conversion angle so
that the vertical line of the red HATCH pattern converges with that of
the green pattern.
8
When the HATCH pattern aligns with the green pattern correctly,
tighten the four CRT fixing screws loosened in step 6.
9
Repeat steps 6 to 8 to loosen the four blue CRT fixing screws (black),
adjust the blue CRT conversion angle and tighten the four CRT fixing
screws.
21
Installation (EN)