6-32
VariQuest
®
Perfecta
®
2400STP
User’s Guide
Troubleshooting Scan and Copy Issues
Troubleshooting Scan and Copy Issues
This section describes the most common copy & scan defects and failure modes,
sorted by relevance and frequency of appearance. A defect is a common image
artifact that usually appears when using any CIS scanner. These are due to
incorrect settings, product limitations, or easily solvable mistakes. A failure mode
is due to malfunctions of some of the scanner components.
Scanner cleanliness is paramount to ensure good image quality. Before
proceeding with any troubleshooting, please make sure the glass scan bars are
clean and in good condition and the pressure sliders (wide, white plastic parts) are
also in good and clean condition.
Some of the corrective actions proposed here require the use of the Scanner
Diagnostic Plot, which you can print and scan as indicated in The scanner
diagnostic plot on page 167. When copying, to be sure that the defect does not
come from the printing function, use this diagnostic plot to detect any scanning
issue.
CAUTION!
CAUTION!
Do not use any printed version of this guide to test the scanner, as the resolution
of the images included here is insufficient. Use the diagnostic plot when
recommended in response to any of the errors described in this chapter.
