Lexmark C720 User's Guide - Page 139

Other printing problems Problem Action Your job did not print or incorrect characters printed. Make sure Ready (or Power Saver) appears on the first line of the operator panel display before you send a job to print. Press Go to return the printer to the ready state. If Ready Hex appears on the operator panel display, you must exit Hex Trace mode before you can print your job. To exit Hex Trace mode, reset the printer or turn the printer off and back 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, verify it is set up properly and the network cable is securely connected. Refer to the documentation that came with your adapter, or the network documentation on the drivers CD for more information. You cannot print color. Make sure the Color Correction menu item is not set to Black and White. Make sure you're using a color printer driver. Make sure color printing is selected from the printer driver. 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. The printer seems slow to print. If Photo Enhance is On, it may take longer to print some complex jobs or jobs formatted for larger paper. You can set Photo Enhance to Off and select the 600 dpi setting if you need the job to print faster. See Photo Enhance for more information. Make sure you select the appropriate 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 the number and 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 for more information. 139