Lexus SC 430 2004 Manual page 383

ELECTRICAL COMPONENTS
Adjusting the vertical aiming
64sa24d
" 1 For vertical movement adjusting bolt 1
(Inside screw)
2 For vertical movement adjusting bolt 2
(Outside screw)
364
64sa22b
1. Turn the Phillips- head screwdriver five turns or
multiple-of-5 turns in either direction for turning the vertical
movement adjusting bolt 1 (inside screw). At this time, keep
the turning direction and number of turns in mind.
Every 5 turns adjust an aiming position to up or down by about
0.2_.