Lexmark C935dn User Manual

							Flash memory card
Make sure the flash memory card is securely connected to the printer system board.
Hard disk with adapter
Make sure the hard disk is securely connected to the printer system board.
Internal print server
If the internal print server does not operate correctly, these are possible solutions. Try one or more of the following:
CHECK THE PRINT SERVER CONNECTIONS
Make sure the internal print server is securely attached to the printer system board.
Make sure you are using the correct (optional) cable and that it is securely connected.
MAKE SURE THE NETWORK SOFTWARE IS CONFIGURED CORRECTLY
For information about installing software for network printing, click View Users Guide and Documentation on the
Software and Documentation CD.
Memory card
Make sure the memory card is securely connected to the printer system board.
USB/parallel interface card
Check the USB/parallel interface card connections:
Make sure the USB/parallel interface card is securely connected to the printer system board.
Make sure you are using the correct cable and that it is securely connected.
Solving paper feed problems
Paper frequently jams
These are possible solutions. Try one or more of the following:
CHECK THE PAPER
Use recommended paper and other specialty media. For more information, see the chapter about paper and specialty
media guidelines.
MAKE SURE THERE IS NOT TOO MUCH PAPER IN THE PAPER TRAY
Make sure the stack of paper you load does not exceed the maximum stack height indicated in the tray or on the
multipurpose feeder. Troubleshooting161
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							CHECK THE PAPER GUIDES
Move the guides in the tray to the correct positions for the paper size loaded.
HAS THE PAPER ABSORBED MOISTURE DUE TO HIGH HUMIDITY?
Load paper from a fresh package.
Store paper in its original wrapper until you use it.
Print jobs are not routed to the booklet‑maker bin
These are possible solutions. Try one or more of the following:
CHECK THE PAPER
Make sure the paper is loaded in a 520‑sheet tray or the multipurpose feeder. If the paper is loaded in the
multipurpose feeder, make sure it is loaded short‑edge first.
Note: Do not load A4‑ or letter‑size paper in the multipurpose feeder.
IS THE LETTER‑ OR A4‑SIZE PAPER LOADED IN A 520‑SHEET TRAY?
The finisher will not accept letter‑ or A4‑size paper from the multipurpose feeder. Load letter‑ or A4‑size paper in
the short‑edge orientation in a 520‑sheet tray.
MAKE SURE THE PAPER SIZE IS SUPPORTED BY THE BOOKLET‑MAKER BIN (BIN 2)
Use one of the following paper sizes supported by Bin 2: A3, A4, B4, folio, legal, letter, or tabloid (11 x 17 in.).
Paper jam message remains after jam is cleared
The paper path is not clear. Clear jammed paper from the entire paper path, and then press .
Page that jammed does not reprint after you clear the jam
In the Setup menu, Jam Recovery is set to Off. Set Jam Recovery to Auto or On:
1Press .
2Press  until Settings appears, and then press . Troubleshooting162
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							3Press  until Setup Menu appears, and then press .
4Press  until Print Recovery appears, and then press .
5Press  until Jam Recovery appears, and then press .
6Press  until On or Auto appears, and then press .
Solving print quality problems
The information in the following topics may help you solve print quality problems. If these suggestions do not correct
the problem, contact Customer Support. You may have a printer part that requires adjustment or replacement.
Isolating print quality problems
To help isolate print quality problems, print the print quality test pages:
1Turn the printer off.
2Load letter‑ or A4‑size paper in the tray in the long‑edge orientation.
3From the control panel, press and hold  and  while turning the printer on.
4Release both buttons when Performing Self Test appears.
The printer performs its power‑on sequence, and then Config Menu appears.
5Press  until Prt Quality Pgs appears, and then press .
The pages are formatted. Printing Quality Test Pages appears, and then the pages print. The message
remains on the display until all the pages print.
6After the print quality test pages print, press  until Exit Config Menu appears, and then press . Troubleshooting163
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							Blank pages
The printer may need to be serviced. For more information, contact Customer Support.
Characters have jagged or uneven edges
If you are using downloaded fonts, verify that the fonts are supported by the printer, the host computer, and the
software program.
Clipped images
These are possible solutions. Try one or more of the following:
CHECK THE PAPER GUIDES
Move the guides in the tray to the correct positions for the paper size loaded.
CHECK THE PAPER SIZE SETTING
Make sure the Paper Size setting matches the paper loaded in the tray.
Dark lines
ABCDE
ABCDE ABCDE
One or more of the photoconductors may be defective. Troubleshooting164
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							If an 84 Color pc unit life warning, 84 Black pc unit life warning, 84 Replace color
pc units, or 84 Replace black pc unit message appears, replace the photoconductor(s).
Gray background
ABCDE
ABCDE ABCDE
REDUCE THE TONER DARKNESS SETTING
From Print Properties, select a different Toner Darkness setting before sending the job to print.
Incorrect margins
ABCD
ABCD
ABCD
CHECK THE PAPER GUIDES
Move the guides in the tray to the correct positions for the paper size loaded.
CHECK THE PAPER SIZE SETTING
Make sure the Paper Size setting matches the paper loaded in the tray.
CHECK THE PAGE SIZE SETTING
Before sending the job to print, specify the correct page size in Print Properties or the software program. Troubleshooting165
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							Light colored line, white line, or incorrectly colored line
These are possible solutions. Try one or more of the following:
CLEAN THE PRINTHEAD LENSES
The printhead lenses may be dirty.
A TONER CARTRIDGE MAY BE DEFECTIVE
Replace the defective toner cartridge.
ARE THE PHOTOCONDUCTORS DEFECTIVE?
Replace the photoconductor(s).
Note: The printer has four photoconductors: cyan, magenta, yellow, and black. The cyan, magenta, and yellow
photoconductors must all be replaced at the same time. The black photoconductor can be replaced separately.
Paper curl
These are possible solutions. Try one or more of the following:
CHECK THE PAPER TYPE SETTING
Make sure the Paper Type setting matches the paper loaded in the tray.
HAS THE PAPER ABSORBED MOISTURE DUE TO HIGH HUMIDITY?
Load paper from a fresh package.
Store paper in its original wrapper until you use it.
Print irregularities
These are possible solutions. Try one or more of the following: Troubleshooting166
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							HAS PAPER ABSORBED MOISTURE DUE TO HIGH HUMIDITY?
Load paper from a fresh package.
Store paper in its original wrapper until you use it.
CHECK THE PAPER TYPE SETTING
Make sure the Paper Type setting matches the paper loaded in the tray.
CHECK THE PAPER
Avoid textured paper with rough finishes.
IS THE TONER LOW?
When 88  toner low appears, order a new cartridge.
Print is too dark
These are possible solutions. Try one or more of the following:
CHECK THE DARKNESS, BRIGHTNESS, AND CONTRAST SETTINGS
The Toner Darkness setting is too dark, the RGB Brightness setting is too dark, or the RGB Contrast setting is too high.
From Print Properties, change these settings.
Note: This solution applies to Windows users only.
From the Quality menu, change these settings.
A TONER CARTRIDGE MAY BE DEFECTIVE
Replace the toner cartridge. Troubleshooting167
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							Print is too light
These are possible solutions. Try one or more of the following:
CHECK THE DARKNESS, BRIGHTNESS, AND CONTRAST SETTINGS
The Toner Darkness setting is too dark, the RGB Brightness setting is too dark, or the RGB Contrast setting is too high.
From Print Properties, change these settings.
Note: This solution applies to Windows users only.
From the Quality menu, change these settings.
HAS THE PAPER ABSORBED MOISTURE DUE TO HIGH HUMIDITY?
Load paper from a fresh package.
Store paper in its original wrapper until you use it.
CHECK THE PAPER
Avoid textured paper with rough finishes.
CHECK THE PAPER TYPE SETTING
Make sure the Paper Type setting matches the paper loaded in the tray.
MAKE SURE COLOR SAVER IS SET TO OFF
Color Saver may be set to On.
IS THE TONER LOW?
When 88  toner low appears, order a new cartridge.
A TONER CARTRIDGE MAY BE DEFECTIVE
Replace the toner cartridge. Troubleshooting168
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							Repeating defects
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DO MARKS OCCUR REPEATEDLY ONLY IN ONE COLOR AND MULTIPLE TIMES ON A PAGE?
Replace the photoconductor(s) if the defects occur every:
44 mm (1.7 in.)
94 mm (3.7 in.)
Note: The printer has four photoconductors: cyan, magenta, yellow, and black. The cyan, magenta, and yellow
photoconductors must all be replaced at the same time. The black photoconductor can be replaced separately.
Skewed print
C
HECK THE PAPER GUIDES
Move the guides in the tray to the correct positions for the paper size loaded.
CHECK THE PAPER
Make sure you are using paper that meets the printer specifications.
Solid color pages
The printer may need to be serviced. For more information, contact Customer Support.
Toner fog or background shading appears on the page
A 
TONER CARTRIDGE MAY BE DEFECTIVE
Replace the toner cartridge. Troubleshooting169
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							ARE THE PHOTOCONDUCTORS WORN OR DEFECTIVE?
Replace the photoconductor(s).
Note: The printer has four photoconductors: cyan, magenta, yellow, and black. The cyan, magenta, and yellow
photoconductors must all be replaced at the same time. The black photoconductor can be replaced separately.
IS THERE TONER IN THE PAPER PATH?
Contact Customer Support.
Toner rubs off
These are possible solutions. Try one or more of the following:
CHECK THE PAPER TYPE SETTING
Make sure the Paper Type setting matches the paper loaded in the tray.
CHECK THE PAPER TEXTURE SETTING
Make sure the Paper Texture setting matches the paper loaded in the tray.
Toner specks
These are possible solutions. Try one or more of the following:
A TONER CARTRIDGE MAY BE DEFECTIVE
Replace the toner cartridge.
IS THERE TONER IN THE PAPER PATH?
Contact Customer Support. Troubleshooting170
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