Epson AcuLaser C8600 Reference Manual page 323

Image Optimum
There is insufficient memory to print the page at the specified
print quality. The printer automatically lowers the print quality
so that it can continue printing. If the quality of the printout is not
acceptable, try simplifying the page by limiting the number of
graphics or reducing the number and size of fonts.
To clear this error, select
Reset Menu. See "How to access the control panel menus" on page
167 for instructions.
Turn the
Menu if you do not want the printer to automatically lower the
print quality to continue printing.
You may need to increase the amount of printer memory to be
able to print at the desired print quality for your document. For
more information on adding memory, see "Memory module" on
page 351.
Install Photoconductor
There is no photoconductor unit installed or the photoconductor
unit is not installed properly. Turn off the printer and install the
photoconductor unit if it is not installed.
If a photoconductor unit is already installed, turn off the printer,
open cover A, then open cover D. Remove the photoconductor
unit, then reinstall it properly. Close covers D and A. The error
clears automatically if the photoconductor unit is properly
installed.
Install Waste T Box
The waste toner collector is not installed, or is installed
incorrectly. If there is no waste toner collector installed, install one
in the printer. If there is a waste toner collector already installed,
try removing it and reinstalling it. See "Replacing the waste toner
collector" on page 268 for instructions.
setting off on the control panel's Printing
from the control panel's
Troubleshooting
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