HP 4620 - Manual (Page 133)

To evaluate the Print Quality Diagnostic Page
This section includes the following topics:
•
Ink Levels
• Good color bars
• Ragged, irregularly streaked, or faded bars
• Regular white streaks in the bars
• Bar colors are not uniform
• Large Black Font Text
• Alignment Patterns
• If you see no defects
Printhead maintenance 129