Xerox Phaser 3330, Service Manual

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Image Quality
Xerox Internal Use Only Phaser 3330 and WorkCentre 3335/3345
Service Manual
3-23
Test Prints
The Test Pattern pages are available for troubleshooting print quality defects and to confirm proper
printer operation. Printing the Test Pattern is useful for stimulating asynchronous (dynamic) events
related to the print process, or as a test for media path and media related problems. Some other key
features of test prints:
•
They are the only diagnostic utility to exercise the entire print cycle.
• They are isolated from the operating system, and are run from firmware.
• Captures static (artifacts that do not change) or dynamic (artifacts that do change position)
events.
• Helps to isolate events that cause print artifacts or prevent printing.
Some Test Patterns are essentially the same but for different media sizes (Letter/A4). The test print
provides a variety of different line styles in both process and cross-process directions. The pattern is
used to check registration, dot size, and image density.
Pattern
Number
Description Purpose
1 Letter page size test
pattern. Light density uniformity, deletions, lines, bands, streaks,
smears, solid area reproducibility, motion quality (LSU).
2 A4 page size test pattern. Light density uniformity, deletions, lines, bands, streaks,
smears, solid area reproducibility, motion quality (LSU).