Lexmark C720 Troubleshooting Manual

Troubleshooting guide

Hide thumbs Also See for C720:

Service manual (442 pages)

User reference manual (299 pages)

Setup manual (117 pages)

page of 15

/ 15
Bookmarks

Quick Links

Download this manual See also: Service Manual, Reference Manual

Printing

Using color

Paper handling

Maintenance

Troubleshooting

Administration

Index

Some printer problems are very easy to solve. If your printer is not responding, first make

sure:

•

The printer cable is securely attached to the printer and the host computer.

•

The power cord is plugged into the printer and a properly grounded electrical outlet.

•

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

for more information. If the message indicates the printer has a paper jam, see

paper

jams.

If you are having trouble determining the source of the problem, see

for other suggestions.

www.lexmark.com

Solving printing problems

Lexmark C720

Understanding printer messages

Clearing

Print quality problems

Need help?

Do you have a question about the C720 and is the answer not in the manual?

Questions and answers

Summary of Contents for Lexmark C720

Page 1: Solving Printing Problems
If the message indicates the printer has a paper jam, see Clearing Troubleshooting paper jams. If you are having trouble determining the source of the problem, see Print quality problems for other suggestions. Administration Index www.lexmark.com Lexmark C720...
Page 2 See Replacing toner cartridges more information. Maintenance Toner accumulates inside the Replace the toner cartridge that matches the color of the toner that printer. has accumulated inside the printer. See Replacing toner cartridges. Troubleshooting Administration Index www.lexmark.com Lexmark C720...
Page 3 Reinsert the cartridge and try printing the job again. Replace the toner cartridge that matches the color on the page that Troubleshooting is too light or not present in the void areas. See Replacing the toner cartridge. Administration Index www.lexmark.com Lexmark C720...
Page 4 Make sure the the drum cleaner is fully seated. See Replace the drum cleaner. Maintenance The page has 100% Replace the toner cartridge that matches the color on the page. See coverage of one color. Replacing toner cartridges. Troubleshooting Administration Index www.lexmark.com Lexmark C720...
Page 5 The toner cartridge may be low on toner, remove the cartridge, shake it, and reinsert it. If the problem still occurs, replace the toner cartridge. See Replacing toner cartridges. Replace the photo developer cartridge. See Replacing the photo Administration developer cartridge. Index www.lexmark.com Lexmark C720...
Page 6 Toner smears or rubs off the Make sure you’re using recommended paper or other media. page. Make sure you have selected the correct Paper Type setting for the media you’re using. Troubleshooting Make sure the rear door is completely closed. Administration Index www.lexmark.com Lexmark C720...
Page 7 • Fold sheets with the text facing outward. • Meter envelopes or use precanceled stamps. Administration • Place envelopes in trays and deliver to the post office; do not drop envelopes into mail boxes or chutes. Index www.lexmark.com Lexmark C720...
Page 8 Solving printing problems Printing Print quality problems (continued) Problem Action Using color Quality of printed Make sure you’re using the recommended Lexmark transparencies. transparencies is inadequate. Transparencies for more information. When printing transparencies, always set Paper Type to Transparency. Paper handling Avoid getting fingerprints on transparencies before printing.
Page 9 Image Smoothing On. See PostScript Menu for more information. Paper handling Maintenance A white gap is noticeable Make sure the three printer foot pads are resting on a level surface. between color fills. Troubleshooting Administration Index www.lexmark.com Lexmark C720...
Page 10 Using color Colors do not print as you Make sure you have selected the appropriate Color Correction and expect. Print Quality values for the job you’re printing. See Color Menu more information. Paper handling Maintenance Troubleshooting Administration Index www.lexmark.com Lexmark C720...
Page 11 Troubleshooting 1329605 (10 ft) or 1427498 (20 ft) for the standard parallel port. If you’re using a Lexmark internal or external network adapter, verify it is set up properly and the network cable is securely connected. Refer to the documentation that came with your adapter, or the Administration network documentation on the Drivers CD for more information.
Page 12 Make sure the adjustable guides in the paper tray are adjusted properly for the media you loaded. Troubleshooting Make sure the stack of media does not exceed the maximum stack height indicated on the tray. Administration Index www.lexmark.com Lexmark C720...
Page 13 Troubleshooting size of fonts, the number and complexity of images, and the number of pages in a job may increase print speed. Set Page Protect Off from the Setup Menu. See Page Protect more information. Administration Index www.lexmark.com Lexmark C720...
Page 14 You get unexpected page Increase the Print Timeout value in the Setup Menu. breaks. Transparencies curl Make sure you’re using the recommended Lexmark transparencies. excessively. Transparencies for more information. Troubleshooting Transparencies jam. Fan transparencies before loading. Make sure you load transparencies only in tray 1.
Page 15 Make sure auto sensing is On unless you have a legal tray installed or are using a paper size that is not supported in auto sensing. Administration Index www.lexmark.com Lexmark C720...