Prepared By: Peter Brandt Version: 08 – 20080415
Page
20 of 26
40-6640 Service Manual
4.2.1
Linearity (or curvature) error.
Either the horizontal or vertical line is not straight (i.e. there is curvature).
Adjustment required:
Adjust the needed screws in the diagram below depending on which laser lines show
curvature. [NOTE: The housing needs to be removed. For the vertical linearity adjustment, the Main
Circuit Board will also need to be detached to provide access to the screws.]
Fig. 4-2-B
Fig. 4-2-C
for horizontal linearity
for vertical linearity
Adjustment screws
Adjustment screws
-
other screw is on other side
Vertical
Reference Line
(COD)
Fig. 4-2-A Linearity (or curvature)
Horizontal
Reference Line
(AOB)
