Table 2-64 Image defects table (continued)
Problem Sample Cause Solution
Light or missing toner.
NOTE: Orientation of the defect
depends on which way the page
travels through the paper path.
In this example, the long edge of
the page is the leading edge.
The toner in the first 2-3 mm (.
08-.12 in) on the entire leading
edge of the page has a blotchy
appearance with toner missing.
NOTE: This is a color example of
this defect. The defect can also
effect mono print jobs.
The image is placed to close to
the leading edge of the page. As
the transfer bias rises in this
region of the page, poor
transfer results.
Use the print driver to increase the
margins on the page.
Print is too dark.
The CPR/density (RD) sensor is
defective.
Replace the CPR/density sensor.
Page is blank.
The high-voltage power-supply
lower is defective (no
developing bias output).
Replace the high-voltage power
supply.
474 Chapter 2 Solve problems ENWW
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