image-quality Troubleshooting
Phaser® 3500 Laser Printer Service Manual
3-5
Resolution
Observe the three resolution check points on several test prints.
■ Ensure that the 2 pixel horizontal, vertical, and diagonal lines are clear and
continuous. The diagonal lines might appear to be narrower than the others.
■ Characters in the text paragraphs should be uniform and equal in density.
■ The halftone patches should be uniform in appearance.
If the image does not meet the criteria, see Non-Uniform Image on page 3-9 or Character
Defects on page 3-10.
Registration and Skew
Fold the paper from two consecutive test prints in half (first side edge to side edge and then top
edge to bottom edge). Observe the fold lines with reference to the crosshairs of the printed
target. The fold line should be aligned perpendicular to the target crosshairs and should be
within ±2.0 mm of the target crosshairs (each line on the target is 1.0 mm). If the image does
not meet the criteria, see Skewed Image on page 3-11.
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