HP 2820 - Manual (Page 266)

Solving scan-quality problems
Problem Cause Solution
Blank pages The original might have been
loaded upside down. In the automatic document
feeder (ADF), put the top end
of the stack of originals into the
ADF input tray, with the media
stack face-up and the first page
to be scanned on top of the
stack.
On the flatbed scanner, place
the original document face-
down with the upper-left corner
of the document at the lower-
right corner of the glass.
Too light or dark The resolution and color levels
may be set incorrectly. Verify that you have the correct
resolution and color settings.
See
Scanner resolution and
color .
Unwanted lines Ink, glue, correction fluid, or an
unwanted substance might be
on the glass. Clean the flatbed scanner
surface. See
To clean the
scanner glass .
The ADF glass might be dirty. Clean the ADF glass. See To
clean the scanner glass .
Black dots or streaks Ink, glue, correction fluid, or an
unwanted substance might be
on the glass. Clean the flatbed scanner
surface. See
To clean the
scanner glass .
Unclear text The resolution and color levels
may be set incorrectly. Verify that you have the correct
resolution and color settings.
See
Scanner resolution and
color .
250 Chapter 14 Troubleshooting ENWW