Lexmark C920 User Manual

Solving option problems
141
Troubleshooting
Solving option problems
If an option does not operate correctly after it is installed or if it quits working:
Turn the printer off, wait for about 10 seconds, and turn the printer on. If this does not fix the problem, unplug the 
printer, and check the connection between the option and printer.
Print the menu settings page and check to see if the option is listed in the Installed Options list. If the option is not 
listed, reinstall it. See Printing the menu...

Solving option problems
142
Troubleshooting
Solving high capacity feeder problems
ProblemSolution
The paper tray does not raise when the 
loading door is closed, or the paper tray does 
not lower when the door is opened and the 
paper tray button is pushed.Check the following:
 The printer is properly attached to the high capacity feeder.
 The printer is powered on.
 The power cord is plugged firmly into the back of the high capacity 
feeder.
 The power cord is plugged into an outlet.
 The outlet...

Solving paper feed problems
143
Troubleshooting
Solving paper feed problems
SymptomCauseSolution
Paper frequently jams. You are using paper that does not 
meet the printer specifications.Use recommended paper and other specialty media.
See the Card Stock & Label Guide available on our 
Lexmark Web site at www.lexmark.com for detailed 
specifications.
See Avoiding jams for information that can help prevent 
jams from occurring.
You have loaded too much paper 
or too many envelopes.Make sure the stack of...

Solving print quality problems
144
Troubleshooting
Solving print quality problems
To help isolate print quality problems, print the Print Quality Test Pages.
1Turn the printer off.
2Press   and  . Hold them while you turn the printer on, and until the Performing Self Test message 
appears.
Config Menu.appears.
3Press  until  Prt Quality Pgs appears, and then press .
The pages are formatted. The Printing Quality Test Pages message appears, then the pages print. The 
message remains on the operator panel...

Solving print quality problems
145
Troubleshooting
Dark Lines A toner cartridge, a 
photodeveloper, or the transfer 
belt is defective.If the problem is on the front (print side) of 
the page:
1Replace the color cartridge causing the 
line.
2If you still have the problem, replace the 
photodeveloper (black alone or all other 
colors at once).
If the problem is on the back of the page, 
replace the transfer belt.
Light colored line, 
white line, or wrong 
colored lineThe LEDs are dirty. See Cleaning the...

Solving print quality problems
146
Troubleshooting
Print too light  The Toner Darkness setting 
is too light, RGB Brightness 
is too bright, or RGB 
Contrast is too high.
 You are using paper that 
does not meet the printer 
specifications.
Color Saver is On.
 Toner is low.
 A toner cartridge is 
defective or has been 
installed in more than one 
printer. Select a different Toner Darkness 
setting, RGB Brightness setting, or RGB 
Contrast setting from the printer driver 
before sending the job to...

Solving print quality problems
147
Troubleshooting
Uneven print density  A toner cartridge is 
defective.
 A photodeveloper is worn or 
defective.
 The transfer belt is worn or 
defective. Replace the toner cartridge.
 Replace the photodeveloper (black 
alone or all other colors at once).
 Replace the transfer belt.
Characters have jagged or uneven edges A downloaded font is not 
supported.If you are using downloaded fonts, verify 
the fonts are supported by the printer, the 
host computer, and the...

Color quality information
148
Troubleshooting
Color quality information
This section helps you understand how operations available on the printer can be used to adjust and customize color 
output.
Quality Menu
Selections available in the Quality Menu provide the user with multiple options that can adjust color characteristics of the 
printer.
Values marked by an asterisk (*) are the factory default settings. Values selected in the printer PostScript or PCL emulation 
drivers for Windows will override...

Quality Menu
149
Troubleshooting
Color SaverTo conserve toner in graphics and 
images yet maintain high quality 
text. The amount of toner used to 
print graphics and images is 
reduced; however, text is printed 
with default toner usage. If 
selected, this setting overrides 
Toner Darkness settings. Color 
Saver is not supported in PPDS, 
and partially supported by the 
PCL emulation driver.On*
Off
RGB BrightnessTo assist in making brightness, 
contrast, and saturation 
adjustments to color output....

Quality Menu
150
Troubleshooting
Manual ColorTo let users customize the RGB or 
CMYK color conversions applied 
to each object on the printed 
page. Color conversion of the data 
specified using RGB 
combinations can be customized 
based on object type (text, 
graphics, or image) through the 
printer operator panel.RGB ImagesRGB Display*: Applies a color 
conversion table to produce output 
that approximates the colors 
displayed on a computer monitor.
sRGB Vivid: Increases color 
saturation for the sRGB...