Print Quality Problems - Epson AcuLaser C4000 Reference Manual

The color looks different from what you see on the computer
screen
Cause
Printed colors do not exactly
match the colors on your
monitor, since printers and
monitors use different color
systems: monitors use RGB
(red, green, and blue), while
printers typically use CMYK
(cyan, magenta, yellow, and
black).
For Macintosh, the System
Profile setting is not in use.
PhotoEnhance4 may be
selected in the printer driver.

Print quality problems

The background is dark or dirty
Cause
There may be a problem with
the photoconductor unit.
304 Troubleshooting
What to do
Although it is difficult to match colors
perfectly, selecting the printer driver's
ICM setting (for Windows XP, Me, 98,
95, or 2000) or ColorSync setting (for
Macintosh) can improve color matching
between different devices. For details,
see "Using the predefined settings" on
page 48 for Windows, and "Using the
predefined settings" on page 131 for
Macintosh.
To apply ColorSync properly, your
input device and the application must
support ColorSync, and a System
Profile must be used for your monitor.
The PhotoEnhance 4 feature corrects the
contrast and brightness of the original
image data, and so may not be suitable
for printing vivid images.
What to do
Replace the photoconductor unit. See
"Photoconductor unit" on page 256.