Laser Beam Pitch Adjustment - Gestetner G056 Service Manual

LASER UNIT

Laser beam pitch adjustment

1. Print out the following test patterns – cross-stitch pattern and grid pattern.
2. Check these test patterns. If the laser beam pitch is not correct, the images are
as follows.
• Cross-stitch pattern: Vertical black strips seem to appear.
• Grid pattern: The density of the diagonal lines is light or the lines have
disappeared.
3. Adjust the LD unit holder position: Tighten or loosen the screw [C] (see the
previous page) until the printout appears as follows.
• Cross-stitch pattern: The thin lines are of uniform thickness (no striping
effect should appear on the printout).
• Grid pattern: The diagonal lines appear clearly and are of normal density.
G056/G058
Feed direction
Adjustment not complete
G056R502.WMF
Adjustment complete
3-8 SM