Lexmark C 540n, Service Manual

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Service Manual
5025-2xx, 4xx
My color transparencies seem dark when they are projected. Is there anything I can
do to improve the color?
This problem most commonly occurs when projecting transparencies with reflective overhead projectors. To
obtain the highest projected color quality, transmissive overhead projectors are recommended. If a reflective
projector must be used, then adjusting the Toner Darkness setting to 1, 2, or 3 will lighten the transparency.
Make sure to print on the recommended type of color transparencies.
What is manual color correction?
When manual color correction is enabled, the printer employs user-selected color conversion tables to process
objects. However, Color Correction must be set to Manual, or no user-defined color conversion will be
implemented. Manual color correction settings are specific to the type of object being printed (text, graphics, or
images), and how the color of the object is specified in the software program (RGB or CMYK combinations).
Notes:
•
Manual color correction is not useful if the software program does not specify colors with RGB or CMYK
combinations. It is also not effective in situations in which the software program or the computer operating
system controls the adjustment of colors.
•
The color conversion tables—applied to each object when Color Correction is set to Auto—generate
preferred colors for the majority of documents.
To manually apply a different color conversion table:
1.
Press Menus ( ) to open the Admin menus.
2.
Select Settings , and press Select ( ).
3.
Select Quality , and press Select ( ).
4.
Select Color Correction , and press Select ( ).
5.
Select Manual , and press Select ( ).
The printer is in manual mode, and you need to select a color conversion table.
6.
Press Back ( ) to return to the Quality menu, select Manual Color , and press Select ( ).
7.
Select the appropriate color conversion table for the affected object type.
Object type Color conversion tables
RGB Image
RGB Text
RGB Graphics • Vivid —Produces brighter, more saturated colors and may be applied to
all incoming color formats.
• sRGB Display —Produces an output that approximates the colors
displayed on a computer monitor. Black toner usage is optimized for
printing photographs.
• Display — True Black —Produces an output that approximates the colors
displayed on a computer monitor. Uses only black toner to create all
levels of neutral gray.
• sRGB Vivid —Provides an increased color saturation for the sRGB
Display color correction. Black usage is optimized for printing business
graphics.
• Off —No color correction is implemented.
CMYK Image
CMYK Text
CMYK Graphics • US CMYK —Applies color correction to approximate the SWOP
(Specifications for Web Offset Publishing) color output.
• Euro CMYK —Applies color correction to approximated EuroScale color
output.
• Vivid CMYK —Increases the color saturation of the US CMYK color
correction setting.
• Off —No color correction is implemented.