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Using color

Paper handling

Maintenance

Troubleshooting

Administration

Printing

Index

Solving printing problems

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Lexmark C720

You cannot print the menu
settings page.

Make sure the selected paper source holds A4, letter, or legal size
paper. Make sure the Paper Type setting for the selected source is
Plain Paper.

You cannot print using the
LocalTalk port.

Make sure neither LocalTalk Port nor LocalTalk Buffer is set to
Disabled in the LocalTalk Menu.

Verify the printer is set up correctly in the Macintosh Chooser.

Paper does not feed properly. Make sure you’re using recommended media. If you are using 16 lb

paper, make sure it has been placed in tray 1 only. Do not use 16 lb
paper with the duplex unit.

Make sure the adjustable guides in the paper tray are adjusted
properly for the media you loaded.

Make sure the stack of media does not exceed the maximum stack
height indicated on the tray.

Other printing problems (continued)

Problem

Action

Содержание C720 SERIES

Страница 1: ... The printer is turned on The electrical outlet is not turned off by any switch or breaker The printer front top and rear doors are completely closed All printer options are properly installed Once you ve checked each of these possibilities turn the printer off and back on This often fixes the problem If a message appears on the operator panel display see Understanding printer messages for more in...

Страница 2: ...e You may have a printer part that requires adjustment or replacement Toner cartridge problems Problem Action You cannot insert a toner cartridge into the printer Make sure the toner cartridge is aligned properly and is being installed in the correct location See Replacing toner cartridges for more information Toner accumulates inside the printer Replace the toner cartridge that matches the color ...

Страница 3: ...ke sure you re using recommended paper or other media Use media from a new package Make sure you have selected the correct Paper Type setting for the media you re using If you suspect a toner cartridge is low on toner remove the appropriate cartridge and gently shake it back and forth to distribute the toner evenly Reinsert the cartridge and try printing the job again Replace the toner cartridge t...

Страница 4: ...e toner cartridge that matches the color of the lines streaks or smudges on the page See Replacing toner cartridges Clean the photo developer discharger See Cleaning the photo developer charger Make sure the the drum cleaner is fully seated See Replace the drum cleaner The page has 100 coverage of one color Replace the toner cartridge that matches the color on the page See Replacing toner cartridg...

Страница 5: ...ridges If the lines are black you may need to replace the fuser See Fuser and air filter for more information Light lines or voids appear from the top of the page to the bottom of the page Remove the photo developer cartridge and clean the dust from the photo developer cartridge discharger See Cleaning the photo developer charger Reinsert the photo developer cartridge and try printing the job agai...

Страница 6: ... is missing Replace the toner cartridge that matches the missing color on the page See Replacing toner cartridges Toner smears or rubs off the page Make sure you re using recommended paper or other media Make sure you have selected the correct Paper Type setting for the media you re using Make sure the rear door is completely closed Print quality problems continued Problem Action ...

Страница 7: ...fuser See Fuser and air filter for more information Printed materials delivered by the postal service arrive with ghosting or mirror images of the text visible on the page When preparing printed materials for mailing Use 24 lb 90 g m2 paper Avoid rough paper select paper with a smoothness from 100 to 150 Sheffield points Fold sheets with the text facing outward Meter envelopes or use precanceled s...

Страница 8: ...ing the recommended Lexmark transparencies See Transparencies for more information When printing transparencies always set Paper Type to Transparency Avoid getting fingerprints on transparencies before printing Print on the page is skewed Make sure the width guides in the paper tray fit snugly against the media you loaded See Loading media for more information Print quality problems continued Prob...

Страница 9: ...720 Quality of printed images is inadequate If you re printing low resolution images using PostScript 3 emulation set Image Smoothing On See PostScript Menu for more information A white gap is noticeable between color fills Make sure the three printer foot pads are resting on a level surface Print quality problems continued Problem Action ...

Страница 10: ...olving printing problems 10 www lexmark com Lexmark C720 Colors do not print as you expect Make sure you have selected the appropriate Color Correction and Print Quality values for the job you re printing See Color Menu for more information Print quality problems continued Problem Action ...

Страница 11: ...on Make sure the printer is not displaying a Toner Empty message If it is you cannot print until you replace the specified toner cartridge If you re using a parallel interface make sure you re using an IEEE 1284 compliant parallel cable We recommend Lexmark part number 1329605 10 ft or 1427498 20 ft for the standard parallel port If you re using a Lexmark internal or external network adapter verif...

Страница 12: ...ure neither LocalTalk Port nor LocalTalk Buffer is set to Disabled in the LocalTalk Menu Verify the printer is set up correctly in the Macintosh Chooser Paper does not feed properly Make sure you re using recommended media If you are using 16 lb paper make sure it has been placed in tray 1 only Do not use 16 lb paper with the duplex unit Make sure the adjustable guides in the paper tray are adjust...

Страница 13: ...riate Paper Type setting before sending a job to print If the Paper Type is set to Transparency the printer adjusts the fuser temperature and slows printing to improve the print quality After printing on this media the printer requires additional time to warm the fuser after you select another Paper Type setting such as Plain Paper or Letterhead Reduce the complexity of your print job Eliminating ...

Страница 14: ...information You get unexpected page breaks Increase the Print Timeout value in the Setup Menu Transparencies curl excessively Make sure you re using the recommended Lexmark transparencies See Transparencies for more information Transparencies jam Fan transparencies before loading Make sure you load transparencies only in tray 1 See Loading transparencies for more information If you just turned the...

Страница 15: ...ing Paper may jam at the rear of the paper tray remove the tray and look inside for jammed paper Then open and close the rear door and top door and press Go See Clearing printer paper jams The page that jammed does not reprint after you clear the jam Set Jam Recovery to Auto or to On in the Setup Menu See Auto Continue for more information Part of the printed page was clipped or is cut off Make su...

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