Canon MultiPASS MP390 User Manual page 142

Cause
The hard disk does not have
enough available memory.
The resolution is low.
The image is not displayed at
100% magnification in the
application.
There is moire when you scan
printed material.
The monitor display colors are set
too low.
The scanning area is not specified. In ScanGear MP, click [Multi-Scan] to automatically specify the
The scanned area does not cover
the entire document.
The color tone displayed in the
preview screen differs from that of
the original.
A cause other than the above is
suspected.
140
Troubleshooting
Check that the hard disk has enough available memory, in particular
when scanning large documents at a high resolution. For example, a
letter-size document scanned at 600 dpi, color requires a minimum
of 300 MB of memory. If you do not have enough available memory,
scan the document at a lower resolution.
If the image looks pixilated, increase the scan resolution.
(See Software Guide, located on your Setup CD-ROM)
Display the image at 100% magnification. Some applications do not
display a small image very well.
In ScanGear MP, click [Descreen]. (See Software Guide, located on
your Setup CD-ROM)
In [Display Properties] of your computer, set the display colors to
16-bit color, 24-bit color or higher.
scan area.
If there are white margins around documents such as photographs, or
if you want to trim a document (i.e. you want to scan only one part
of a document), specify the area of the scan manually. (See Software
Guide, located on your Setup CD-ROM)
Place the document approximately 1/8 in. (3 mm) away from the
front and right edges of the platen glass.
Perform calibration to scan the image with the correct color tone.
(See Software Guide, located on your Setup CD-ROM)
Restart the computer.
Action
Chapter 13