Oki LP-1040 Maintenance Manual page 586

Rotating the flat head screws on the right and left of the LED head by 1/4 of a rotation
changes the print of pattern 14 as shown below.
1/4 of a rotation further
counterclockwise
(Total of 1/2 a rotation)
1/4 of a rotation
counterclockwise
Focal point is aligned
1/4 of a rotation
clockwise
1/4 of a rotation further
clockwise
(Total of 1/2 a rotation)
10-54
Focal point is not aligned.
(The printout is light)
Print direction
Focal point is not aligned.
(The printout is slightly light)
Print direction
Focal point is aligned.
Print direction
Focal point is not aligned.
(The printout is slightly light)
Print direction
Focal point is not aligned.
(The printout is light)
Print direction